Конференції, семінари, читання за 2006 рік http://elartu.tntu.edu.ua/handle/123456789/15802 2026-04-18T13:40:02Z 2026-04-18T13:40:02Z http://elartu.tntu.edu.ua/handle/123456789/16841 2017-06-06T07:33:53Z 2006-09-25T00:00:00Z

Назва: Видавнича сторінка

2006-09-25T00:00:00Z http://elartu.tntu.edu.ua/handle/123456789/16840 2017-06-06T07:33:42Z 2006-09-25T00:00:00Z

Назва: Зміст

2006-09-25T00:00:00Z http://elartu.tntu.edu.ua/handle/123456789/16839 2017-06-06T07:33:34Z 2006-09-25T00:00:00Z

Назва: Список авторів

2006-09-25T00:00:00Z Мельничок, Л. С. Mel'nychok, L. S. http://elartu.tntu.edu.ua/handle/123456789/16838 2017-06-06T07:33:22Z 2006-09-25T00:00:00Z

Назва: Стохастична модель дискретного росту втомної тріщини Автори: Мельничок, Л. С.; Mel'nychok, L. S. Короткий огляд (реферат): Proceeding from the analyses of experimental data a stochastic model of a fatigue crack descrete growth has been proposed. It describes qualitatively the mechanism of damage accumulation in the process zone. This model includes characteristics of fatigue crack growth resistance of the materials, which determine the experimental scatter of specimens durability. A procedure of prediction of the probability parameters of structural elements life time under cyclic loading, which is necessary for their reliability assessment has been proposed. The mentioned procedure of life time assessment can be used for expert systems constructions.

2006-09-25T00:00:00Z Сулим, Георгій Теодорович Любін, О. Sulym, H. Lyubin, O. http://elartu.tntu.edu.ua/handle/123456789/16837 2017-06-06T07:33:13Z 2006-09-25T00:00:00Z

Назва: Вплив теплоутворення на контактну взаємодію у з’єднанні “циліндр – зношуваний кільцевийшар” Автори: Сулим, Георгій Теодорович; Любін, О.; Sulym, H.; Lyubin, O. Короткий огляд (реферат): The mathematical model of contact interaction in joint as “cylinder – wearing circular layer” with take into consideration wear and heat development are proposed. Being based on analytical solution of tribocontact problem contact stresses and layer wear are explore. The results of numerical analysis are presented and influence of heat development on contact stresses and wear are investigated too.

2006-09-25T00:00:00Z Сулим, Георгій Теодорович Кундрат, М. М. Sulym, H. T. Kundrat, M. M. http://elartu.tntu.edu.ua/handle/123456789/16836 2017-06-06T07:33:03Z 2006-09-25T00:00:00Z

Назва: Відшарування тонкогожорсткого включення при циклічному навантаженні за умов плоскої задачі термопружності Автори: Сулим, Георгій Теодорович; Кундрат, М. М.; Sulym, H. T.; Kundrat, M. M. Короткий огляд (реферат): Separation of a rigid thin inclusion heated up to the set temperature is investigated in conditions of a plane problem thermoelasticity. Development of localized zones of prefracture (the weakened contact) precedes inclusions separation in a vicinities of its ends. They can correspond to regions of damages, plastic deformation, partial break of connection and another precedes. The analytical solution of the problem is obtained and its numerical analysis is made.

2006-09-25T00:00:00Z Букетов, Андрій Вікторович Стухляк, Петро Данилович Чихіра, І. В. Добротвор, Ігор Григорович Кальба, Е. М. Buketov, A. V. Stuhlyak, P. D. Chyhira, I. V. Dobrotvor, I. G. Kalba, E. M. http://elartu.tntu.edu.ua/handle/123456789/16835 2017-06-06T07:36:11Z 2006-09-25T00:00:00Z

Назва: Дослідження стійкості до спрацювання епоксикомпозитів, що містять модифікований ультразвуком «гібридний» наповнювач Автори: Букетов, Андрій Вікторович; Стухляк, Петро Данилович; Чихіра, І. В.; Добротвор, Ігор Григорович; Кальба, Е. М.; Buketov, A. V.; Stuhlyak, P. D.; Chyhira, I. V.; Dobrotvor, I. G.; Kalba, E. M. Короткий огляд (реферат): Existence of chemical and physical links between active groups of epoxy resin and dispersed particles is determined due. It provides forming interlayers in the filled systems. Influence of nature of dispersed fillers on adhesive resistance and physical-mechanical properties of polymer-composites. Experimentally it is proved, that preliminary processing a ultrasonic field disperse and fibrous store allows to adjust in a wide range operational.

2006-09-25T00:00:00Z Опанасович, В. К. Слободян, М. С. Opanasovych, V. K. Slobodyan, M. S. http://elartu.tntu.edu.ua/handle/123456789/16834 2017-06-06T07:35:36Z 2006-09-25T00:00:00Z

Назва: Згин круглої пластини з радіальноютріщиною, береги якої контактують Автори: Опанасович, В. К.; Слободян, М. С.; Opanasovych, V. K.; Slobodyan, M. S. Короткий огляд (реферат): Bending of the circle isotropic plate with radial crack with contact shores is investigated. For want of solving of a problem was considered, that the shores of a crack come in contact on the upper basis on all it’s length. A solving of a problem constructed with use of methods of the theory of functions of a complex variable and complex potentials. The system of singular integral equations was untied numerically with the help of method of mechanical quadratures. The numerical analysis of a problem is conducted, because of which constructed graphic dependence of contact pressure and moments intensity factor and strain intensity factor.

2006-09-25T00:00:00Z Boyko, A. Kononova, O. Бойко, А. Кононова, О. http://elartu.tntu.edu.ua/handle/123456789/16833 2017-06-06T07:33:59Z 2006-09-25T00:00:00Z

Назва: Расчет прочности котла вагона-цистерны при циклическом нагружении Автори: Boyko, A.; Kononova, O.; Бойко, А.; Кононова, О. Короткий огляд (реферат): В данной работе выполнена оценка усталостной прочности котла вагона- цистерны при циклическом нагружении на основании прочностного расчета, определен характер изменения во времени основных нагрузок и их влияние на появление усталостных трещин котла, выявленных при техническом освидетельствовании вагонов-цистерн. Оценено влияние действия циклических вертикальных (динамика груза), продольных (тяговые, сжимающие) и поперечных (боковая рамная сила) нагрузок на усталостную прочность котла в условиях эксплуатации на Латвийской железной дороге.

2006-09-25T00:00:00Z Borisenko, V. A. Levchenko, V. A. Arhipov, O. G. Борисенко, В. А. Левченко, В. А. Архипов, А. Г. http://elartu.tntu.edu.ua/handle/123456789/16832 2017-06-06T07:33:24Z 2006-09-25T00:00:00Z

Назва: О характере разрушения стали 12Х18Н10Т при пульсирующей нагрузке в условиях производств разделения воздуха Автори: Borisenko, V. A.; Levchenko, V. A.; Arhipov, O. G.; Борисенко, В. А.; Левченко, В. А.; Архипов, А. Г. Короткий огляд (реферат): The results of investigations of nitrogen and oxygen regenerators metal after long period of exploitation with analysis of change of mechanical properties and structural state under the influence of the low temperatures and pulsating load are given in this paper. It is shown the destruction of 12X18H10T steel occurs because of the undiffusion processes of transition of austenite info martensite and of cracking on the borders of grains. The destruction process of apparatus proceeds most intensively on the welded joints where the most structural non-uniformity with presence of welding defects and residual stresses take place.

2006-09-25T00:00:00Z Василюк, П. М. Vasylyuk, P. M. http://elartu.tntu.edu.ua/handle/123456789/16831 2017-06-06T07:32:42Z 2006-09-25T00:00:00Z

Назва: Високотемпературне окиснення та руйнування легованих залізохромових сплавів Автори: Василюк, П. М.; Vasylyuk, P. M. Короткий огляд (реферат): The paper presents the equations of regression on the alloying elements influence on the s-phase formation according to the FACOMP calculating system. The experimentally obtained temperature-time dependencies for such elements as Al, Si, Cr, allow evaluating the change of the alloy chemical composition under work in the temperature interval of 1273-1623 K. It was found out, that under prolonged testing of the alloys, such elements as Mo, W promote the alloyed phases formation, which allows to recommend application of the economicallyalloyed alloys.

2006-09-25T00:00:00Z Андрейків, О. Є. Сас, Н. Б. Andreykiv, O. E. Sas, N. B. http://elartu.tntu.edu.ua/handle/123456789/16830 2017-06-06T07:36:05Z 2006-09-25T00:00:00Z

Назва: Визначення залишкової довговічності тонкостінних елементів конструкцій в умовах високотемпературної повзучості Автори: Андрейків, О. Є.; Сас, Н. Б.; Andreykiv, O. E.; Sas, N. B. Короткий огляд (реферат): A calculation model for evaluation of sub critical crack propagation hightemperature creep in metallic plates is proposed. The model is based on the first low of thermodynamics on energy balance and the balance of energy change velocity in a metallic plate, containing a macro crack and subjected to long-term static loading tension under hightemperature field effect, thus providing the process of stable creep in the process zone near the crack tip. On the basis of above mentioned the equation with original and final conditions are obtained that composed the mathematical model for determining the sub critical crack growth period under high-temperature creep in metallic plates.

2006-09-25T00:00:00Z Heidarov, Sh. G. Гейдаров, Ш. Г. http://elartu.tntu.edu.ua/handle/123456789/16829 2017-06-06T07:35:41Z 2006-09-25T00:00:00Z

Назва: Усталостное разрушение тормозного барабана автомобиля Автори: Heidarov, Sh. G.; Гейдаров, Ш. Г. Короткий огляд (реферат): The problem of fatigue fracture mechanics for a drum of brake system of the car has been considered. It is assumed that at multifold braking the fatigue fracture of materials caused by a contact interaction and accompanied by action temperature takes place with friction. It is considered that there are cracks near the surface of the brake drum, contact. By the methods of analytical functions theory the problem considered is reduced to the system of singular integral equations and to the infinite system of linear algebraic equations. The procedure of defining stress-intensity factors is shown. It is investigated kinetics of fatique cracks of materials brake drum. Calculation of the period subcritical growth of fatique crack is carried out. In the calculations the function describing the ronghness of the drum surface has been assumed to be a stationary random function with a zero average value and known dispersion.

2006-09-25T00:00:00Z Божидарнік, В. В. Максимович, О. В. Максимович, Я. В. Bozhidarnik, V. V. Maksymovych, O. V. Maksymovych, Ya. V. http://elartu.tntu.edu.ua/handle/123456789/16828 2017-06-06T07:35:01Z 2006-09-25T00:00:00Z

Назва: Алгоритм та комплекси програм для розрахунку траєкторій ташвидкості розповсюдження втомних тріщин в пластинках Автори: Божидарнік, В. В.; Максимович, О. В.; Максимович, Я. В.; Bozhidarnik, V. V.; Maksymovych, O. V.; Maksymovych, Ya. V. Короткий огляд (реферат): Developed approach to finding of form of cracks and rate of distribution of tops of crack depending on the amount of cycles of loading, that is built on the method of surveillance, method of the integral evening and upshots to the type Grina. Influencing of size and directions of action of the external distributed loading or concentrated forces, placing, form of initial cracks is explored on the path of distribution of cracks and the rates fatigue cracks growth are expected.

2006-09-25T00:00:00Z Божидарнік, В. В. Опанасович, В. К. Герасимчук, П. В. Bozhidarnik, V. V. Opanasovych, V. K. Gerasymchuk, P. V. http://elartu.tntu.edu.ua/handle/123456789/16827 2017-06-06T07:32:59Z 2006-09-25T00:00:00Z

Назва: Згин пластини з двома рівними симетричними тріщинами по дузі кола з урахуванням контакту їх берегів Автори: Божидарнік, В. В.; Опанасович, В. К.; Герасимчук, П. В.; Bozhidarnik, V. V.; Opanasovych, V. K.; Gerasymchuk, P. V. Короткий огляд (реферат): In this paper the problem of one-sided bend of a plate with two symmetric cracks along the arc of circle by bend moments on infinity including a contact of their sides in the presence of geometric and physical symmetry of a sum has been investigated. By virtue of contact of crack’s sides a task solution is given in the form of solution of two tasks: plane problem and bend (classical theory). Using complex potentials and methods of the theory complex variable quantity function, task solution has been reduced to linear conjugation, on the base of which the equation for finding the contact effort between crack’s sides is got. Evident forms for complex potentials, contact efforts between crack’s sides, coefficients of intensity efforts, moments are got for carrying out the numerical analysis, results of which are shown graphically.

2006-09-25T00:00:00Z Рибак, Тимофій Іванович Підгурський, Микола Іванович Сташків, Микола Ярославович Rybak, T. I. Pidgursky, M. I. Stashkiv, M. Ya. http://elartu.tntu.edu.ua/handle/123456789/16826 2019-12-24T11:02:54Z 2006-09-25T00:00:00Z

Назва: Методи визначення КІН для дефектних елементів замкнутого профілю Автори: Рибак, Тимофій Іванович; Підгурський, Микола Іванович; Сташків, Микола Ярославович; Rybak, T. I.; Pidgursky, M. I.; Stashkiv, M. Ya. Короткий огляд (реферат): The bases of engineering methods of determination of stress intensity factors (SIF) are considered for the elements with cracks of the closed type. Mathematical models are built and SIF is are explored using two methods – through nominal tensions in netto-section and through the change of moment of inertia of the transversal crossing of elements. Correctional functions for thin-walled profiles are given. The analytical and experimental results of SIF’s are compared.

2006-09-25T00:00:00Z Lyashenko, B. A. Trapezon, A. G. Mirnenko, V. I. Rutkovsky, A. V. Ляшенко, Б. А. Трапезон, А. Г. Мирненко, В. И. Рутковский, А. В. http://elartu.tntu.edu.ua/handle/123456789/16825 2017-06-06T07:32:47Z 2006-09-25T00:00:00Z

Назва: Циклическая прочность титанових сплавов с PVD-покрытиями в условиях высокочастотного нагружения при нормальных и повышенных температурах Автори: Lyashenko, B. A.; Trapezon, A. G.; Mirnenko, V. I.; Rutkovsky, A. V.; Ляшенко, Б. А.; Трапезон, А. Г.; Мирненко, В. И.; Рутковский, А. В. Короткий огляд (реферат): Research influence Ti, (TiAl)N, and (Ti)N PVD-coatings on cycle strength of titanium alloy (VT1-0 and VT-20) underby temperature of 350…6400C and frequency loading of 10 kHz are studyed.

2006-09-25T00:00:00Z Kuzukov, A. M. Arhipov, O. G. Kulikov, D. A. Lipko, G. V. Кузюков, А. Н. Архипов, А. Г. Куликов, Д. А. Липко, Г. В. http://elartu.tntu.edu.ua/handle/123456789/16824 2017-06-06T07:36:17Z 2006-09-25T00:00:00Z

Назва: Стойкость сталей аустенитного класса при совместном действии вибрации и коррозии Автори: Kuzukov, A. M.; Arhipov, O. G.; Kulikov, D. A.; Lipko, G. V.; Кузюков, А. Н.; Архипов, А. Г.; Куликов, Д. А.; Липко, Г. В. Короткий огляд (реферат): The results of investigations of influence the vibration on the rate of increasing the intercrystallite corrosion of steel 12X18H10T is shown in given article. Given investigations show that the vibration gives a great influence on the rate of increasing the intercrystallite corrosion.

2006-09-25T00:00:00Z Байло, В. Г. Baylo, V. G. http://elartu.tntu.edu.ua/handle/123456789/16823 2017-06-06T07:36:04Z 2006-09-25T00:00:00Z

Назва: Ергодинаміка втоми Автори: Байло, В. Г.; Baylo, V. G. Короткий огляд (реферат): The main task of the work is development of the analytical means to approximation and forecasting of limiting properties of materials at cyclic deformation. The analysis of the equation accumulation of energy and the equation of durability for a case of cyclic loading is carried out. The received results have allowed to offer a method of forecasting of fatigue strength and durability at cyclic loading and plotting of fatigue curves.

2006-09-25T00:00:00Z Сулим, Георгій Теодорович Кривень, М. В. Sulym, H. T. Kryven, M. V. http://elartu.tntu.edu.ua/handle/123456789/16822 2017-06-06T07:35:59Z 2006-09-25T00:00:00Z

Назва: Двоперідична задача про пластичне відшаровування за поздовжнього зсувужорстких ромбічних призматичних включень у середовищі з затримкоютекучості Автори: Сулим, Георгій Теодорович; Кривень, М. В.; Sulym, H. T.; Kryven, M. V. Короткий огляд (реферат): Plastic interfacial slip of double-periodic system of rigid rhombic fibers under the conditions of shear load of composite is investigated. The medium material is elasto-plastic with yielding delay. Conditions of localizations of plastic deformations only on the inclusionmedium boundary are considered. Dependences of plastic bands lengths on the load level are determined.

2006-09-25T00:00:00Z Грабар, І. Г. Титаренко, В. Є. Grabar, I. G. Tytarenko, V. E. http://elartu.tntu.edu.ua/handle/123456789/16821 2017-06-06T07:35:54Z 2006-09-25T00:00:00Z

Назва: Моделювання та еспериментальні дослідження кінетики втомних тріщин драбинних рам напівпричепів Автори: Грабар, І. Г.; Титаренко, В. Є.; Grabar, I. G.; Tytarenko, V. E. Короткий огляд (реферат): It was developed a system of cyclic trials for investigation of vitality of critic zones of langeron frame ladder constructions and shown the results of tests on low-cycle fatigue of its natural elements in the work.

2006-09-25T00:00:00Z Медвідь, А. Г. Остаф, В. Ю. Остаф, І. Ю. Medvid', A. G. Ostaf, V. Yu. Ostaf, I. Yu. http://elartu.tntu.edu.ua/handle/123456789/16820 2017-06-06T07:35:44Z 2006-09-25T00:00:00Z

Назва: Методика багатофунціональних досліджень впливу фізичних і хімічнних чинників на комплекс фізико-механічних властивостей та механічну втому металевих систем Автори: Медвідь, А. Г.; Остаф, В. Ю.; Остаф, І. Ю.; Medvid', A. G.; Ostaf, V. Yu.; Ostaf, I. Yu. Короткий огляд (реферат): The experimental plant and technique for complex research of influence of the several physical and chemical factors, which operate simultaneously or in certain sequence, on a number of physical properties of samples as plates with thickness 0,5-2 mm, width of 2-15 mm and length of 8-12 mm or cylinder with diameter of 1-5 mm and length of 8-12 mm. The plant allows to investigate influence of corrosion environments, temperatures, a kind of cyclic loadings and character of cracks on endurance of metals and module Jung’s, thermo elastic coefficient, factor of thermo-EMF and electroresistance. Measurement can be spent as during influence of the certain factors on separate samples, and it is more reliable comparative measurements on two identical samples of various influences, or identical conditions on samples of one alloy, but with different initial phase-structural conditions. Influences of crystal-structural factors on a complex of physical-mechanical properties of alloys on an iron - nickel basis are analyzed.

2006-09-25T00:00:00Z Чаусов, Микола Георгійович Пилипенко, Андрій Петрович Параца, В. М. Chausov, M. G. Pylypenko, A. P. Paratsa, V. M. http://elartu.tntu.edu.ua/handle/123456789/16819 2017-06-06T07:35:25Z 2006-09-25T00:00:00Z

Назва: Експериментальне дослідження деформування пластичних матеріалів з урахуванням раптових змін в режимі навантаження Автори: Чаусов, Микола Георгійович; Пилипенко, Андрій Петрович; Параца, В. М.; Chausov, M. G.; Pylypenko, A. P.; Paratsa, V. M. Короткий огляд (реферат): The common laws of fracture kinetics in different classes materials under influence of suddenly changes in the loading mode at different stages of deformation it is established.

2006-09-25T00:00:00Z Піняк, І. С. Pinyak, I. S. http://elartu.tntu.edu.ua/handle/123456789/16818 2017-06-06T07:35:14Z 2006-09-25T00:00:00Z

Назва: Багатоциклове втомне руйнування конструкційних матеріалів при їх пружно-пластичному деформуванні Автори: Піняк, І. С.; Pinyak, I. S. Короткий огляд (реферат): The developed method of recording current values of crack tip opening displacement made it possible to reliably establish the instant when the “material” contact between the borders of a fatigue crack near its tip in a tension half-cycle ceases and the upper time limit after which the phenomenon of contact does not occur again, as well as to develop experimentally fatigue crack growth criteria. The phenomenon of “material” contact is evidenced by the presence of residual compressive stresses on the fatigue crack borders near the tip during fracture, which impede the crack propagation in the passive part of the stress cycle. Analysis of the revealed regularities in the fatigue crack propagation, changes in its kinetic diagrams and the upper time limits of the contact phenomena due to various factors, and existing formulas for crack growth rate calculations combined with the criteria and approaches developed enabled reliable description of the fatigue crack propagation kinetics and determination of the crack growth rate, life, and fracture types, as well as establishing the relation between time-dependent local parameters of stress- and strain-based fracture criteria, which accounts for the effect of any factors, their values lying in a wide range, which cause elastic-plastic deformation of structural materials, on the fracture process.

2006-09-25T00:00:00Z Kornilova, A. V. Корнилова, А. В. http://elartu.tntu.edu.ua/handle/123456789/16817 2017-06-06T07:34:58Z 2006-09-25T00:00:00Z

Назва: Практические аспекты определения допустимой технологической дефектности базовых деталей Автори: Kornilova, A. V.; Корнилова, А. В. Короткий огляд (реферат): Предлагается при оценке технологической дефектности и составлении карты допускаемых дефектов с целью снижения консервативности расчетных схем и подходов разработать базу математических моделей, максимально приближенных к реальным дефектам, присущим результату применения каждой конкретной технологии. Определение долговечности предлагается проводить с учетом прогнозируемой истории нагружения. Окончательное решение о выбраковке детали по обнаруженной технологической дефектности принимать только после проведения расчетного краш - теста детали с выявленными в реальной конструкции и введенными в модель дефектами.

2006-09-25T00:00:00Z Панасюк, В. В. Силованюк, Віктор Петрович Маруха, В. І. Panasyuk, V. V. Sylovanyuk, V. P. Marukha, V. I. http://elartu.tntu.edu.ua/handle/123456789/16816 2017-06-06T07:34:48Z 2006-09-25T00:00:00Z

Назва: Утомне руйнування матеріалів із заповненими тріщинами Автори: Панасюк, В. В.; Силованюк, Віктор Петрович; Маруха, В. І.; Panasyuk, V. V.; Sylovanyuk, V. P.; Marukha, V. I. Короткий огляд (реферат): The formula for calculation of the damages accumulation under cyclic loading in the material has been proposed. The processes of cyclic elasto-plastic deformation at the filled crack tip have been investigated using the above formula. New kinetic dependences of fatigue crack propagation have been obtained. It was established that macrocrack growth rate in a cyclically deformed body is related, apart of the loading parameters and known strength characteristics of the material, with the parameters that account the intensity of damages accumulation and nonstability of the hysteresis loop width with the increase in the loading cycles number.

2006-09-25T00:00:00Z Bagmutov, V. P. Savkin, A. N. Багмутов, В. П. Савкин, А. Н. http://elartu.tntu.edu.ua/handle/123456789/16815 2017-06-06T07:33:51Z 2006-09-25T00:00:00Z

Назва: Оценка долговечности стали на основании нелинейной модели накопления повреждаемости Автори: Bagmutov, V. P.; Savkin, A. N.; Багмутов, В. П.; Савкин, А. Н. Короткий огляд (реферат): В работе приводится сравнительный анализ расчетных методов оценки долговечности стали на основе линейной и нелинейной гипотез суммирования повреждений при случайном внешнем нагружении по нормальному закону распределения, аппроксимированном блоковой нагрузкой.

2006-09-25T00:00:00Z Цибаньов, Г. В. Кураш, Ю. П. Tsyban’ov, G. V. Kurash, Yu. P. http://elartu.tntu.edu.ua/handle/123456789/16814 2017-06-06T07:33:44Z 2006-09-25T00:00:00Z

Назва: Методика і результати дослідження зародження тріщини в умовах фретинг-утоми Автори: Цибаньов, Г. В.; Кураш, Ю. П.; Tsyban’ov, G. V.; Kurash, Yu. P. Короткий огляд (реферат): Technique for determination of crack initiation lifetime under fretting fatigue has developed. It represents a combination of the French’s method and the statistical staircase method. Using this technique, relation between crack initiation and total lifetime for pair of steel 15 kp – steel 45 under fretting fatigue established. Fatigue crack initiation part constitutes about 50 per cent when total lifetime is equal to ~ 106 cycles. Lowering stress amplitude down to fretting fatigue limit leads to increasing the fatigue crack initiation part.

2006-09-25T00:00:00Z Shashurin, G. V. Khrushchov, M. M. Fishgoyt, A. V. Шашурин, Г. В. Хрущов, М. М. Фишгойт, А. В. http://elartu.tntu.edu.ua/handle/123456789/16813 2017-06-06T07:33:39Z 2006-09-25T00:00:00Z

Назва: Диаграмма роста коротких трещин при сложном циклическом нагружении Автори: Shashurin, G. V.; Khrushchov, M. M.; Fishgoyt, A. V.; Шашурин, Г. В.; Хрущов, М. М.; Фишгойт, А. В. Короткий огляд (реферат): На основании представления о структурно-зависимом характере усталостного разрушения получено уравнение верхней границы скорости роста коротких усталостных трещин в припороговой области кинетической диаграммы усталостного разрушения гранулируемых никелевых сплавов. Предложено линейное правило расчета скорости роста трещины в пределах одного цикла нагружения со сложной структурой. Показана принципиальная возможность построения при сложном циклическом нагружении диаграммы роста коротких трещин, которая наиболее простым образом позволяет учесть влияние коротких усталостных трещин на общую долговечность элементов конструкций из гранулируемых никелевых сплавов.

2006-09-25T00:00:00Z Жовдак, В. О. Білоцерківський, О. Б. Тарасова, Л. Ф. Смірнов, М. М. Zhovdak, V. A. Belocerkovscky, A. B. Tarasova, L. F. Smirnov, M. M. http://elartu.tntu.edu.ua/handle/123456789/16812 2017-06-06T07:33:32Z 2006-09-25T00:00:00Z

Назва: Прогнозування втомних пошкоджень візків вагонів електропоїздів Автори: Жовдак, В. О.; Білоцерківський, О. Б.; Тарасова, Л. Ф.; Смірнов, М. М.; Zhovdak, V. A.; Belocerkovscky, A. B.; Tarasova, L. F.; Smirnov, M. M. Короткий огляд (реферат): Theoretical approaches, mathematical models and the software for the decision of the following problems are developed: statistical dynamics and reliability prediction of bogie frames. Prognostication of reliability is conducted on the basis of solution of statistical dynamics problem. The method of reliability prediction of bogie frames on a prototype is developed.

2006-09-25T00:00:00Z Petrova, I. M. Петрова, И. М. http://elartu.tntu.edu.ua/handle/123456789/16811 2017-06-06T07:33:16Z 2006-09-25T00:00:00Z

Назва: Моделирование изменения циклической прочности конструкционных сталей при динамическом нагружении в области длительной долговечности Автори: Petrova, I. M.; Петрова, И. М. Короткий огляд (реферат): The fatigue resistance characteristics under 108…109 cycles life duration are considered. It is emphasized that generally the fatigue curve might have four characteristic zones. Stress concentration change due to loading cycles increase is examined. The comparison of the fatigue tests results under regular and irregular loading under 108…109 cycles was carried out.

2006-09-25T00:00:00Z Крижанівський, Є. І. Побережний, Любомир Ярославович Kryzhanivsky, Ye. I. Poberezhny, L. Ya. http://elartu.tntu.edu.ua/handle/123456789/16810 2017-06-06T07:33:10Z 2006-09-25T00:00:00Z

Назва: Низькочастотна втома та корозійна втома підземних магістральних трубопроводів Автори: Крижанівський, Є. І.; Побережний, Любомир Ярославович; Kryzhanivsky, Ye. I.; Poberezhny, L. Ya. Короткий огляд (реферат): The deformation behavior of pipeline’s steel is studied at step-by-step static and low frequency cyclic loading in air and chloride environment. The complete curve of fatigue and curve of corrosion fatigue is built, which will enable it is better to forecast a resource and remaining resource of main pipelines work.

2006-09-25T00:00:00Z Іваницький, Ярослав Лаврентійович Кунь, Петро Степанович Ivanytskyi, Ya. L. Kun', P. S. http://elartu.tntu.edu.ua/handle/123456789/16809 2017-06-06T07:33:05Z 2006-09-25T00:00:00Z

Назва: Оцінка опірності конструкційних матеріалів втомному руйнуваннюза складного навантаження Автори: Іваницький, Ярослав Лаврентійович; Кунь, Петро Степанович; Ivanytskyi, Ya. L.; Kun', P. S. Короткий огляд (реферат): A task of fatigue crack growth during simultaneous realization of three macromechanisms of destruction is considered. On the basis of energy approach the formula for determination of crack growth rate is offered. The calculations values are compared with experimental data.

2006-09-25T00:00:00Z Гурей, І. В. Гжесік, В. Hurey, I. Gzesik, W. http://elartu.tntu.edu.ua/handle/123456789/16808 2017-06-06T07:32:54Z 2006-09-25T00:00:00Z

Назва: Вплив модифікованого поверхневогошару деталей при фрикційному зміцненні на малоциклову втому сталей Автори: Гурей, І. В.; Гжесік, В.; Hurey, I.; Gzesik, W. Короткий огляд (реферат): The friction hardening of steel 20, 45 and 65Г essentially increases the resistance at small cycle fatigue failure when conducting research both in the air and in the corrosion environment (3% water solution of NaCl and also with cathode polarization). The durability increases about 2.5 times at low amplitudes of deformation (e = 0.7% and less).

2006-09-25T00:00:00Z Караїм, В. С. Когут, М. С. Caraim, V. S. Kogut, M. S. http://elartu.tntu.edu.ua/handle/123456789/16807 2017-06-06T07:36:22Z 2006-09-25T00:00:00Z

Назва: Методика дослідження ударно-втомного руйнування консольної балки защемленої біля концентратора Автори: Караїм, В. С.; Когут, М. С.; Caraim, V. S.; Kogut, M. S. Короткий огляд (реферат): In work the working method of record of diagram of shock-tireless destruction of beam standard is offered by a bend on a cantilever, which is jammed near concentrator in the device, fastened on the flag of the special setting developed on the base of engine of internal zgoryannya car ZIL-131-131. The record of such diagram is carried out from shtovhacha with glued on on him after the bridge chart of tenzodavachami, which from the circulating eccentric person of distributive vala enters by a butt end surface in the contact with the lower surface of beam; thus the got signal through a strengthener is written down in co-ordinates (R-t) or (R-N) in screen of oscillograph. Here R – effort of oudara; t, N – time and amount of cycles of vidnoulovogo cyclic deformation of standard accordingly. The written down diagram has the appearance of triangle with a radius at a top and repeats oneself with the period of a next oberta eccentric person fist of distributive vala. She allows at the fixed bending on the day of concentrator to set the period of origin and period of distribution of crack in a net crossing of the jammed beam due to the change of its inflexibility. High-quality and quantitative pictures of kinetics of origin and distribution of crack and the change of effort of bend R from the amount of cycles of shock-tireless deformation N is fixed by two video cameras, obectivi which drive to the edge of contsentratora of beam and on the screen of oscillograph accordingly. The value of amount of cycles of the N rotation of distributive vala with ecstsentricami is written down by a meter. The described thus working method allows to forecast the resource of capacity of loaded at the beam indicated by a chart with concentrator taking into account influencing of brand of its material, thermal strengthening, working environment and other technological factors.

2006-09-25T00:00:00Z Леонець, В. А. Leonets, V. A. http://elartu.tntu.edu.ua/handle/123456789/16806 2017-06-06T07:36:18Z 2006-09-25T00:00:00Z

Назва: Лазерно-радіаційний метод емуляції зміни границі витривалості конструкційних матеріалів Автори: Леонець, В. А.; Leonets, V. A. Короткий огляд (реферат): This paper presents a method using laser and radiation technology for the emulation of degrading endurance limits of engineering materials which have been used for a long time. It is shown that endurance limits of engineering materials and products made of them can be both increased and decreased by means of laser radiation treatment, and electron stream treatment through precipitators. It is offered to measure changes in engineering materials’ endurance limits by registering changes in their strained surface layers, particularly in points where fatigue cracks have occurred. A method for registering changes in strained surface layers of engineering materials using AVK-T1 zero-indicator has been considered.

2006-09-25T00:00:00Z Войналович, О. В. Писаренко, Георгій Георгійович Васинюк, І. М. Копчевський, П. М. Майло, Андрій Миколайович Голованьов, Ю. М. Vojnalovich, A. V. Pisarenko, G. G. Vasinyuk, I. M. Kopchevsky, P. M. Maylo, A. N. Golovan’ov, Y. M. http://elartu.tntu.edu.ua/handle/123456789/16805 2017-06-06T07:36:13Z 2006-09-25T00:00:00Z

Назва: Візуалізація втомної пошкоджуваності елементів металоконструкцій Автори: Войналович, О. В.; Писаренко, Георгій Георгійович; Васинюк, І. М.; Копчевський, П. М.; Майло, Андрій Миколайович; Голованьов, Ю. М.; Vojnalovich, A. V.; Pisarenko, G. G.; Vasinyuk, I. M.; Kopchevsky, P. M.; Maylo, A. N.; Golovan’ov, Y. M. Короткий огляд (реферат): This paper presents the results of monitoring of cracktype damages, located at the nearsurface as well as undersurface layeres of the metallostructures with the help of the set including hard and software provision. This set has the possibilyty to detect surface cracks in the elements of metallostructures covered by dielectric layer of 5 mm thick as well as that one, located under surface of metall.

2006-09-25T00:00:00Z Патеюк, А. Боґдановіч, З. Сулим, Георгій Теодорович Patejuk, A. Bogdanowicz, Z. Sulym, H. http://elartu.tntu.edu.ua/handle/123456789/16804 2017-06-06T07:36:09Z 2006-09-25T00:00:00Z

Назва: Втомні властивості й перебіг руйнування іонно азотованої сталі 50H21G9N4 Автори: Патеюк, А.; Боґдановіч, З.; Сулим, Георгій Теодорович; Patejuk, A.; Bogdanowicz, Z.; Sulym, H. Короткий огляд (реферат): In the paper the fundamental fatigue properties of the valve steel 50H21G9N4 in delivery state and with modified after ionic nitrided surface layer are investigated. The fatigue strength of test pieces of such materials under cyclic loading are determine and their fracture processes are describe.

2006-09-25T00:00:00Z Capelle, J. Gilgert, J. Pluvinage, G. http://elartu.tntu.edu.ua/handle/123456789/16803 2017-06-06T07:36:00Z 2006-09-25T00:00:00Z

Назва: Hydrogen effect on fatigue life of a pipe steel Автори: Capelle, J.; Gilgert, J.; Pluvinage, G. Короткий огляд (реферат): Transport by pipe is the means more used, at the present time, to convey energies of their point of extraction until their field sites final. To limit any risk of explosion or of escape and thus to limit the geological problems of pollution and the human risks, it is necessary to be able to know the mechanical properties of the steels used in the manufacture of these pipes. With the reduction in oil stocks, it is necessary to find a new energy. Hydrogen is this new energy vector, it thus will also be necessary to be able to transport it. This study makes it possible to emphasize the assignment of the lifespan of hydrogen on a pipeline steel normally used in the transport of gas. The fatigue tests in 3 points bending are carried out on samples not standards because of dimensions of the tube of origin.

2006-09-25T00:00:00Z Yasniy, P. Marushchak, P. Lapusta, Yu. Baran, D. http://elartu.tntu.edu.ua/handle/123456789/16802 2017-06-06T07:35:57Z 2006-09-25T00:00:00Z

Назва: Evaluation of in-service surface cracking of rolls of continuous casting machines Автори: Yasniy, P.; Marushchak, P.; Lapusta, Yu.; Baran, D. Короткий огляд (реферат): The in-service damage in the material for rolls of continuous casting machines is investigated, in particular, the topology of surface cracks is studied, and their statistical analysis is made. Using the results of the microhardness measurements, the structural degradation of the material is evaluated depending on the distance to the roll surface.

2006-09-25T00:00:00Z Балицький, О. І. Balitskii, A. I. http://elartu.tntu.edu.ua/handle/123456789/16801 2017-06-06T07:35:55Z 2006-09-25T00:00:00Z

Назва: Вплив експлуатаційних середовищна розвиток втомних тріщин у високоазотних сталях Автори: Балицький, О. І.; Balitskii, A. I. Короткий огляд (реферат): The characteristic parameters dependence under cyclic deformation in hydrogen, chloride environments and the subsequent selective dissolution has been studied. For high nitrogen steels and welded joints it has been established that mechanical stresses accelerate general dissolution of an alloy in different ways and lead to the formation of a surface layer morphology which is different from the original one. Welded joints characterized by a higher corrosion fatigue resistance in all investigated solutions, except saturated cupper chloride solution.

2006-09-25T00:00:00Z Cempel, G. Gasiak, G. http://elartu.tntu.edu.ua/handle/123456789/16800 2017-06-06T07:35:48Z 2006-09-25T00:00:00Z

Назва: Experimental research on influence on single overloadon fatigue life of constructional steels under complex load Автори: Cempel, G.; Gasiak, G. Короткий огляд (реферат): The paper presents the results of fatigue life tests under complex load conditions (proportional bending with torsion) with single overload for the different overload ratios (kj=1.5; kj = 2). Specimens of square sections made of costructional steels: 10HNAP and 18G2A with unilateral sharp notches were tested. The tests were performed at the fatigue test stand MZGS-100; amplitude of resultant moment was Ma=16 N.m (proportion of bending and torsion moments was Mag/Mas =1.73). Fatigue crack growth was measured with a microscope magnifying 25x. It was found that a single overload causes an essential change of fatigue life. It has been shown that the overload factor strongly influences those changes.

2006-09-25T00:00:00Z Marciniak, Z. Rozumek, D. Macha, E. http://elartu.tntu.edu.ua/handle/123456789/16799 2017-06-06T07:35:34Z 2006-09-25T00:00:00Z

Назва: Comparison of the calculated and experimental fatigue lives under non-proportional bending with torsion of 10hnap steel Автори: Marciniak, Z.; Rozumek, D.; Macha, E. Короткий огляд (реферат): The paper contains the results of fatigue tests of 10HNAP steel under nonproportional bending with torsion. The circular smooth specimens were tested. The tests were carried out at the fatigue test stands MZGS-200PL and MZGS-200L. The best results of experimental and calculation lives consistence for the considered materials was obtained using the criterion of maximum shear stresses in the critical plane and the Palmgren-Miner hypothesis of damage accumulation.

2006-09-25T00:00:00Z Yakovleva, T. Yu. Matokhnyuk, L. E. Яковлева, Т. Ю. Матохнюк, Л. Е. http://elartu.tntu.edu.ua/handle/123456789/16798 2017-06-06T07:35:27Z 2006-09-25T00:00:00Z

Назва: Взаимосвязь характеристик усталости и разрушения титановых сплавов Автори: Yakovleva, T. Yu.; Matokhnyuk, L. E.; Яковлева, Т. Ю.; Матохнюк, Л. Е. Короткий огляд (реферат): Interrelation between fatigue and fracture characteristics for titanium alloy has been shown basing on the analysis of the fatigue curves equations and fatigue fracture diagrams which incorporate cyclic loading rate and cycles asymmetry ratio. The kinetic diagrams equations parameters can be obtained from fatigue curve equation. The calculated fatigue and fracture resistance characteristics were compared with the experiments for VT1-0 titanium alloy.

2006-09-25T00:00:00Z Gasiak, G. Robak, G. http://elartu.tntu.edu.ua/handle/123456789/16797 2017-06-06T07:35:22Z 2006-09-25T00:00:00Z

Назва: Fatigue life of constructional materials under bending with torsion for crack propagation Автори: Gasiak, G.; Robak, G. Короткий огляд (реферат): The paper presents description of the equivalent range of the stress intensity factor in the case of bending with torsion of specimens where initiation and propagation of fatigue cracks are observed. Calculations with the Matlab-Simulink program were performed in order to estimate fatigue life. The calculations were realized for variable amplitudes of the resultant moment 13 and 16 N×m. The Forman’s relation was also used for the calculations. It has been shown that the Forman’s relation is suitable for description of fatigue life in the tested range of fatigue crack propagation.

2006-09-25T00:00:00Z Опальчук, А. С. Opalschuk, A. S. http://elartu.tntu.edu.ua/handle/123456789/16796 2017-06-06T07:35:11Z 2006-09-25T00:00:00Z

Назва: Опір розповсюдженнювтомної тріщини в зміцнених сталях Автори: Опальчук, А. С.; Opalschuk, A. S. Короткий огляд (реферат): The results of resistance of destruction of hardening steels in the process of fatigue test are shown.

2006-09-25T00:00:00Z Pokrovsky, V. V. Yezhov, V. N. Sydiachenko, V. G. Koval, Yu. I. Покровский, В. В. Ежов, В. Н. Сидяченко, В. Г. Коваль, Ю. И. http://elartu.tntu.edu.ua/handle/123456789/16795 2017-06-06T07:34:52Z 2006-09-25T00:00:00Z

Назва: Исследование закономерностей развития трещин при смешанных схемах нагружения Автори: Pokrovsky, V. V.; Yezhov, V. N.; Sydiachenko, V. G.; Koval, Yu. I.; Покровский, В. В.; Ежов, В. Н.; Сидяченко, В. Г.; Коваль, Ю. И. Короткий огляд (реферат): The crack growth resistance of different metals under mixed mode (I+II) and biaxial loading was investigated. Fracture pattern depends on the load ratio under different modes and their level. Criterial equation were proposed.

2006-09-25T00:00:00Z Vuherer, T. Hlado, V. Hutsaylyuk, V. Maruschak, P. Yasniy, P. Gliha, V. http://elartu.tntu.edu.ua/handle/123456789/16794 2017-06-06T07:34:37Z 2006-09-25T00:00:00Z

Назва: Crack emanation from defects modelled by extremely small drilled holes in two conditions Автори: Vuherer, T.; Hlado, V.; Hutsaylyuk, V.; Maruschak, P.; Yasniy, P.; Gliha, V. Короткий огляд (реферат): Fatigue is the primary reason for the failure of structural components. Resistivity of a coarse grain heat affected zone against fatigue crack initiation in presence of micro-defects is discussed in the present article. Samples of material with a martensitic coarse grain heat affected zone microstructure were prepared by proper thermal treatments. Microstructurally small holes were used as artificial micro-defects. They were created by drilling. Compressive residual stresses appear in the material due to the irreversibility of plastic deformation. Moment of hole drilling enables to prepare samples with and without effects of residual stresses. Critical stress level for fatigue crack initiation depends on the actual size of the hole. The location and the way of crack initiation is affected by the presence and character of residual stresses.

2006-09-25T00:00:00Z Dukhota, A. I. Kindrachuk, M. V. Labunets, V. F. Духота, А. И. Киндрачук, М. В. Лабунец, В. Ф. http://elartu.tntu.edu.ua/handle/123456789/16793 2017-06-06T07:34:06Z 2006-09-25T00:00:00Z

Назва: Влияние фреттинг-коррозии на усталостную прочность титановых сплавов Автори: Dukhota, A. I.; Kindrachuk, M. V.; Labunets, V. F.; Духота, А. И.; Киндрачук, М. В.; Лабунец, В. Ф. Короткий огляд (реферат): The results of the executed researches of BT1-0, OT4, BT8, BT3-1 titanium alloys fretting-fatigue strength was represented. Influence of vibro–contact loading parameters, nature of the attended materials, level of initial strength and structure of alloys on the degree of their fatigue strength reduction under the action of fretting-corrosion was showed. Directions of the titanium alloys fretting-fatigue further researches was determined.

2006-09-25T00:00:00Z Arsenos, P. Zafiris, K. Kartsonaki, E. Kouskouti, M. Kyriakos, K. Papassalouros, D. Pavlou, D. Vlachakis, N. V. http://elartu.tntu.edu.ua/handle/123456789/16792 2017-06-06T07:33:27Z 2006-09-25T00:00:00Z

Назва: Damage analysis of pressure pipes under high temperature and variable pressure conditions Автори: Arsenos, P.; Zafiris, K.; Kartsonaki, E.; Kouskouti, M.; Kyriakos, K.; Papassalouros, D.; Pavlou, D.; Vlachakis, N. V. Короткий огляд (реферат): The problem of non-linear stress analysis of creeping reinforced pipes under constant pressure has been treated in a recent work [1]. In the present work, a damage accumulation analysis of the above problem is attempted taking into account the non-linear distribution of the stresses as well as non-linear damage accumulation under variable pressure and/or temperature conditions. For the stress analysis a non-linear differential equation is used to derive the stress concentration in critical locations of power pipes reinforced by rigid rings which are distributed along their axis. Due to step-wised temperature and internal pressure of the pipe, the damage accumulation is predicted by using a damage function specified with respect to damage parameter derived by the stress versus Larson-Miller coefficient curve. Advantages of the proposed methodology are: (a) the 2-D creep stress analysis incorporates mechanical behaviours of material derived by uniaxial tests, (b) the predicted damage accumulation due to the variable pressure takes into account the previous damage history as well as the loading order effect.

2006-09-25T00:00:00Z Prutskov, M. E. Kolmakov, A. G. Bunin, I. Zh. Пруцков, М. Е. Колмаков, А. Г. Бунин, И. Ж. http://elartu.tntu.edu.ua/handle/123456789/16791 2017-06-06T07:32:52Z 2006-09-25T00:00:00Z

Назва: Методы оценки диссипативных свойств сталей при низких температурах Автори: Prutskov, M. E.; Kolmakov, A. G.; Bunin, I. Zh.; Пруцков, М. Е.; Колмаков, А. Г.; Бунин, И. Ж. Короткий огляд (реферат): Use of the methodology of multifractal parameterization of structures, for conducting an estimate of habits of change in micromechanisms of shattering of steel at different temperatures of the testings, reflecting to dynamic loudspeaker of the latent dissipative processes. This method allows to present quantitatively not only an over-all configuration of structure for actual natural materials, but also inhomogeneity of allocation geometrical, physical, chemical, etc. characteristics, according to the nature of investigated structure that cannot be reached ordinary methods.

2006-09-25T00:00:00Z Krivenyuk, V. V. Yegorova, M. I. Кривенюк, В. В. Егорова, М. И. http://elartu.tntu.edu.ua/handle/123456789/16790 2017-06-06T07:32:45Z 2006-09-25T00:00:00Z

Назва: Применение базовых соотношений для прогнозирования длительной прочности при статическом и циклическом нагружении Автори: Krivenyuk, V. V.; Yegorova, M. I.; Кривенюк, В. В.; Егорова, М. И. Короткий огляд (реферат): It is shown that the experience of processing the large amounts of experimental data on the long-term strength of heat-resistant steels and alloys using the method of base diagrams, which were obtained from testing of smooth specimens, can be used effectively for proper processing of test results for notched specimens. Extensive research has been carried out in order to find an appropriate combination of a lifetime prediction rule and a suitable constitutive model to give a reliable prediction of lifetime in idealized creep-rupture-low cycle fatigue interaction conditions.

2006-09-25T00:00:00Z Ковальчук, Ярослав Олексійович Kovalchuk, Ya. O. http://elartu.tntu.edu.ua/handle/123456789/16789 2017-06-06T07:35:52Z 2006-09-25T00:00:00Z

Назва: Втомне руйнування сплаву АМг6 при низькоамплітудному навантаженні Автори: Ковальчук, Ярослав Олексійович; Kovalchuk, Ya. O. Короткий огляд (реферат): The influence of preliminary plastic tensile - compression deformation (PPD) on threshold of AMg6 alloy is investigated. The dependence between roughness of fracture surface, distance between grooves and threshold stress intensity factor (SIF) range is obtained. The general data of the influence of preliminary plastic deformation on threshold crack resistance are obtained based on the analyses of both self obtained results and results of other authors. The classification of materials by the criteria of sensitivity of threshold crack resistance to preliminary tensile - compression plastic strain.

2006-09-25T00:00:00Z Bovsunovsky, A. P. Matveyev, V. V. Бовсуновский, А. П. Матвеев, В. В. http://elartu.tntu.edu.ua/handle/123456789/16788 2017-06-06T07:35:46Z 2006-09-25T00:00:00Z

Назва: Вибродиагностические параметры усталостной поврежденности упругих тел Автори: Bovsunovsky, A. P.; Matveyev, V. V.; Бовсуновский, А. П.; Матвеев, В. В. Короткий огляд (реферат): The results of investigations of most sensitive vibration based characteristics of fatigue type damage are presented. The characteristics of damage under consideration were damping and parameters of non-linear effects caused by the change of elastic body stiffness at the instant of crack opening-closure. A closing crack causes the dynamic behaviour of vibrating system to be significantly non-linear. Numerical and experimental investigations of forced vibrations of beams with a closing crack have demonstrated that the main distinctive features of such a vibration system are the manifestation of effects associated with nonlinearity, namely the presence of sub- and super-harmonic resonances and significant nonlinearity of the vibration responses (displacement, acceleration, strain) at sub- and superresonances. The sensitivity of these non-linear effects to the crack presence exceeds many times (one or even two orders of magnitude) the sensitivity of natural frequencies and mode shapes, as well as the sensitivity of non-linear effects at resonance. This opens up the good prospect of using sub- and super-resonance regimes for the diagnosis of fatigue cracks.

2006-09-25T00:00:00Z Várkoly, Ladislav http://elartu.tntu.edu.ua/handle/123456789/16787 2017-06-06T07:35:38Z 2006-09-25T00:00:00Z

Назва: Modern possibilities of image viewing processeses – industrial’s and university’s applications Автори: Várkoly, Ladislav Короткий огляд (реферат): This paper provides an overview of some advanced modern industrial’s and educational’s applications of image viewing processes such as simulators, video inspection systems, robotics crawlers, observations by using light and electron microscopy etc. In general, these techniques have found application in teaching and training processes and also for the detection, characterization and sizing determination of cracks and other imperfections whether inherent, processing or service induced. Some possilities of application of image viewing processes of professional firms and specialised laboratories oriented to check of quality of material (structure), technologies (welding, heat treatment etc.) are presented. The topic connection form of those laboratories is network. Some author’s experiences of Special laboratory of light microscopy from the field of metallographic observations and their interpretation in teaching/training processes and networking collaboration are also presented.

2006-09-25T00:00:00Z Войналович, О. В. Писаренко, Георгій Георгійович Васинюк, І. М. Копчевський, П. М. Майло, Андрій Миколайович Голованьов, Ю. М. Vojnalovich, A. V. Pisarenko, G. G. Vasinyuk, I. M. Kopchevsky, P. M. Maylo, A. N. Golovan’ov, Yu. M. http://elartu.tntu.edu.ua/handle/123456789/16786 2017-06-06T07:35:32Z 2006-09-25T00:00:00Z

Назва: Розподіл локальної непружності при циклічному навантажуванні металевих матеріалів Автори: Войналович, О. В.; Писаренко, Георгій Георгійович; Васинюк, І. М.; Копчевський, П. М.; Майло, Андрій Миколайович; Голованьов, Ю. М.; Vojnalovich, A. V.; Pisarenko, G. G.; Vasinyuk, I. M.; Kopchevsky, P. M.; Maylo, A. N.; Golovan’ov, Yu. M. Короткий огляд (реферат): Relation between the statistical parameters of distributing of local inealasticity in the microvolumes of the material and characteristics of fatigue of metallic materials is set. The ranges of longevity to destruction of samples are exposed, in wich monotony of change of the rationed dispersion of local inelasticity of microstructure of the samples is observered.

2006-09-25T00:00:00Z Івасів, В. М. Артим, В. І. Гладун, В. В. Дейнега, Р. О. Ivasiv, V. M. Artym, V. I. Gladun, V. V. Deynega, P. O. http://elartu.tntu.edu.ua/handle/123456789/16785 2017-06-06T07:35:29Z 2006-09-25T00:00:00Z

Назва: Модель багатоциклового корозійно-втомного пошкодження деталей машин Автори: Івасів, В. М.; Артим, В. І.; Гладун, В. В.; Дейнега, Р. О.; Ivasiv, V. M.; Artym, V. I.; Gladun, V. V.; Deynega, P. O. Короткий огляд (реферат): The report is dedicated to a problem of the phenomenological specification statement of corrosive fatigue damage in the small stresses conditions. As the baseline equation usage the E.K.Pochtenny’s equation is offered, which one will to the greatest degree be matched with experimental results in a high-cycle corrosion fatigue conditions for steel specimens and full-scale parts. Also this equation is in a basis of the whole complex of designed methods of an estimation of durability and residual operational life of accountable of members of constructions operating in high-cycle fatigue conditions. The disadvantage of the equation is asymptotically lower branch, coming nearer to endurance strength, of a curve of fatigue, which one in corrosive conditions does not correspond to results of experiments. For overcoming this disadvantage the two-parameter equation for lower branches of a curve of a corrosion fatigue is offered. The calculus of arguments is spent with the help of the system of the nonlinear equations. The result of applying of the equation is showed on an actual example of a pump rods curve of fatigue.

2006-09-25T00:00:00Z Zainetdinov, R. I. http://elartu.tntu.edu.ua/handle/123456789/16784 2017-06-06T07:35:23Z 2006-09-25T00:00:00Z

Назва: Multifractal approach to the description and wavelet analysis of the fatigue damage Автори: Zainetdinov, R. I. Короткий огляд (реферат): A phenomenological model for the multifractal description of the fatigue damage accumulation has been introduced. The multifractal approach gives probabilistic evidence for the existence of a constructive process hidden in the temporal pattern of damage accumulation. It is shown that a series of Bernoulli trials results in multiplicative bi- or polynomial process that recursively generates the multifractal probability measure. Connection between parameter of the Bernoulli trials and multifractal spectrum is considered. A technique for revealing the multifractal properties of the damage accumulation is proposed. For the approbation of the technique, a computer simulation study has been done. The wavelet transform has been used for revealing the intrinsic temporal structure of data sets obtained from numerical simulation, tests, empirical observations and measurements.

2006-09-25T00:00:00Z Yakovleva, T. Yu. Яковлева, Т. Ю. http://elartu.tntu.edu.ua/handle/123456789/16783 2017-06-06T07:32:16Z 2006-09-25T00:00:00Z

Назва: Роль локальной пластической деформации в усталостном разрушении металлов Автори: Yakovleva, T. Yu.; Яковлева, Т. Ю. Короткий огляд (реферат): The higher the degree to which an analytical model of the fatigue damages accumulation accounts local and heterogeneous in time and material volume nature of the process, the wider is the range of materials and lives it covers. In particular, based on the analysis of the mathematical structure of the equation for S-N curves given in the paper, the author shows that the value of physical limit of endurance is determined by the parameters characterizing the development of local plastic deformation and the value of true limit elasticity. The parameters characterizing the development of local plastic deformation reflect the interconnection between the fatigue and inelasticity phenomena. The dependence of fatigue limit on the frequency sа(f), cycles asymmetry ratio sа(R), and size of structural elements sа(d) for a given number of cycles NFr, as well as the dependence of frequency on the cyclic life NFr(f) for a specified stress level sа = const are caused by the dependence of the development of the plastic damage localization areas on the listed parameters.

2006-09-25T00:00:00Z Baran, Sebastian Gasiak, Grzegorz Toś, Paweł http://elartu.tntu.edu.ua/handle/123456789/16782 2017-06-06T07:32:12Z 2006-09-25T00:00:00Z

Назва: Numerical analysis of life of notched specimens subjected to complex bending with torsion Автори: Baran, Sebastian; Gasiak, Grzegorz; Toś, Paweł Короткий огляд (реферат): The authors analyzed life of specimens with rectangular sections and with notches (crack initiators). The specimens were loaded by amplitudes of bending and torsional moments, Mg and Ms respectively. The analysis was performed with use of the finite element method and the MSC Patran program using a modulus for fatigue calculations Fatigue. The analysis was done in order to select amplitudes of torsional and bending loading and determine fatigue life of the specimens made of 18G2A steel.

2006-09-25T00:00:00Z Гладьо, В. Б. Гуцайлюк, Володимир Богданович Окіпний, Ігор Богданович Hlado, V. B. Hutsaylyuk, V. B. Okipn, I. B. http://elartu.tntu.edu.ua/handle/123456789/16781 2017-06-06T07:32:02Z 2006-09-25T00:00:00Z

Назва: Мікромеханізми деформування і напруження сколювання теплостійкої сталі Автори: Гладьо, В. Б.; Гуцайлюк, Володимир Богданович; Окіпний, Ігор Богданович; Hlado, V. B.; Hutsaylyuk, V. B.; Okipn, I. B. Короткий огляд (реферат): The influence of preliminary plastic deformation by tension, combined tension and cyclical elasto-plastic deformation on cleavage stress of steel 15Kh2MFA in a state of heat treatment which one models radiation embitterment, of a material of a nuclear reactor type as VVER-440 on the end life time was investigated. Is detected, that with increase of a preliminary plastic deformation of tension and relative cyclical operating time the dislocation density in low-angle boundary was increased. The dependence of cleavage stress of steel 15Kh2MFA from a dislocation density after preliminary deformation was investigated. Increase of a dislocation density in low-angle boundary and decrease of the size of structural elements after deformation by tension and combined tension increase cleavage stress. In conditions of cyclical elasto-plastic deformation of accumulation fatigue damaging in the form of micropores decrease net cross-sectional, of a specimen, and the presents microcracks ease formation macrocrack by its start crack growth from available defects of structure, which one set conditions for decrease of cleavage stress.

2006-09-25T00:00:00Z Sosnovskiy, L. A. Сосновский, Л. А. http://elartu.tntu.edu.ua/handle/123456789/16780 2017-06-06T07:31:59Z 2006-09-25T00:00:00Z

Назва: О развитии представлений об усталости металлов Автори: Sosnovskiy, L. A.; Сосновский, Л. А.

2006-09-25T00:00:00Z Ostash, O. P. Panasyuk, V. V. http://elartu.tntu.edu.ua/handle/123456789/16779 2017-06-06T07:31:37Z 2006-09-25T00:00:00Z

Назва: A phenomenological model of macrocrack initiation and growth in cyclically deformed material Автори: Ostash, O. P.; Panasyuk, V. V. Короткий огляд (реферат): Role of the process zone in fatigue macrocrack initiation and propagation is considered. An examples of the assessment of the fatigue macrocrack initiation period, Ni, and the failure period, Nf, of a notched specimens on the base of unified model using fatigue macrocrack growth rates only are shown. Some backgrounds and well-known fatigue phenomena (Kitagawa's and Smith's diagrams, etc) are discussed.

2006-09-25T00:00:00Z Belodedenko, S. V. Bilichenko, G. N. Ermokrattev, V. A. Белодеденко, С. В. Биличенко, Г. Н. Ермократьев, В. А. http://elartu.tntu.edu.ua/handle/123456789/16778 2017-06-06T07:31:27Z 2006-09-25T00:00:00Z

Назва: Исследование влияния роста асимметрии цикла и перегрузок на накопление повреждений в высокопрочной стали Автори: Belodedenko, S. V.; Bilichenko, G. N.; Ermokrattev, V. A.; Белодеденко, С. В.; Биличенко, Г. Н.; Ермократьев, В. А. Короткий огляд (реферат): The behavior regularities of function, which is intended for updating magnitude of cumulative fatigue damages under overloading, are considered. The quantitative evaluation of effect on the durability of main and overloading step cycle asymmetry is carried out. The programmable test results of the cylindrical alloy steel specimens with different stress-ratio are used. The nature of increase in durability under switch-over from programmable to random change of loading cycle characteristics is established.

2006-09-25T00:00:00Z Gadolina, I. V. Гадолина, И. В. http://elartu.tntu.edu.ua/handle/123456789/16777 2017-06-06T07:31:11Z 2006-09-25T00:00:00Z

Назва: Испытания при нерегулярном нагружении как источник информации о поведении кривой усталости в гигацикловой области Автори: Gadolina, I. V.; Гадолина, И. В. Короткий огляд (реферат): By means of comparison of calculated and experimental durabilities estimations under service loading and using linear damage summation rule hypothesis a posterior estimation of the fatigue curve type (with-, or without horizontal part, broken type est.) in gigacycle region is estimated. Conception of acceleration coefficient is introduced to decrease the systematic error of estimation.

2006-09-25T00:00:00Z Terentyev, V. F. Терентьев, В. Ф. http://elartu.tntu.edu.ua/handle/123456789/16776 2017-06-06T07:31:22Z 2006-09-25T00:00:00Z

Назва: Механизм зарождения усталостных трещин в высокопрочных сталях при гигацикловой усталости Автори: Terentyev, V. F.; Терентьев, В. Ф.

2006-09-25T00:00:00Z Андрейків, О. Є. Кіт, М. Б. Andreykiv, O. E. Kit, M. B. http://elartu.tntu.edu.ua/handle/123456789/16775 2017-06-06T07:31:15Z 2006-09-25T00:00:00Z

Назва: Втомне руйнування тонкостінних елементів конструкцій при двовісному навантаженні Автори: Андрейків, О. Є.; Кіт, М. Б.; Andreykiv, O. E.; Kit, M. B. Короткий огляд (реферат): An energy approach to evaluation of the subcritical fatigue crack growth period under biaxial tension of a plate with an initially rectilinear crack has been proposed. The influence of the change of such external loading parameters as: an angle between the loading axes, difference in amplitudes and frequencies, differences in the beginning of cycles (shear by please), difference in loading types (one-long-term static loading, the other – cyclic loading) has been investigated.

2006-09-25T00:00:00Z Fomichev, P. A. Фомичев, П. А. http://elartu.tntu.edu.ua/handle/123456789/16774 2017-06-06T07:30:48Z 2006-09-25T00:00:00Z

Назва: Энергетический метод расчета долговечности при случайном нагружении Автори: Fomichev, P. A.; Фомичев, П. А. Короткий огляд (реферат): The fatigue life computation method, based on energy criterion of fatigue damage and model of material cyclic deformation after overload under the conditions of random loading is suggested. The determination of the maximum stress amplitude depending on the number of recycling for loading time before failure is provided. The results of the fatigue life estimation under the conditions of homogeneous stressed state are compared with experimental data obtained by S. Svenson, with spectral damage summation theory by V. L. Raiher and with linear summation hypothesis. The dependence of the right part of linear hypothesis depending on dispersion of random loading process is established.

2006-09-25T00:00:00Z Bobyr, N. I. Yakhno, B. O. Grabovskiy, A. P. Бобырь, Н. И. Яхно, Б. О. Грабовский, А. П. http://elartu.tntu.edu.ua/handle/123456789/16773 2017-06-06T07:31:05Z 2006-09-25T00:00:00Z

Назва: Моделирование процессов накопления повреждений при малоцикловом нагружении Автори: Bobyr, N. I.; Yakhno, B. O.; Grabovskiy, A. P.; Бобырь, Н. И.; Яхно, Б. О.; Грабовский, А. П.

2006-09-25T00:00:00Z Lepikhin, P. P. Лепихин, П. П. http://elartu.tntu.edu.ua/handle/123456789/16772 2017-06-06T07:35:13Z 2006-09-25T00:00:00Z

Назва: Моделирование затухающей памяти формы траектории в теории простых материалов с упругопластическим поведением и начальной поверхностьюнагружения Автори: Lepikhin, P. P.; Лепихин, П. П. Короткий огляд (реферат): A mathematical theory of strict construction of reduced constitutive relations for Noll’s simple strain-hardening elastoplastic materials with an initial loading surface and a path shape memory fading during the active deformation was developed. The strains and the type of symmetry of the material properties are arbitrary. Constitutive equations were derived for materials without the path shape memory, for those with a weak fading memory, and with an n-th order fading memory. An elastic-perfectly plastic material is defined from the standpoint of the fading memory of path shape. The theory of strict construction of reduced constitutive relations for materials with a 1-st order fading memory of path shape for infinitesimal strains was developed on the assumption that the strain measures are small over the whole history. Special attention is given to isotropic materials.

2006-09-25T00:00:00Z Varfolomeyev, I. Yasniy, O. http://elartu.tntu.edu.ua/handle/123456789/16771 2017-06-06T07:30:58Z 2006-09-25T00:00:00Z

Назва: Integrity assessment of cracked components using probabilistic methods Автори: Varfolomeyev, I.; Yasniy, O. Короткий огляд (реферат): In this study probabilistic methods of the fracture mechanics are applied to integrity assessment of cracked components subjected to static and cyclic loading. Various key issues related to a probabilistic analysis are discussed and accounted for in the calculations. An example illustrating the application of computational procedures to evaluate the integrity of a component with postulated cracks is presented. Finally, some available experimental results on fatigue crack growth are re-evaluated based on the use of statistical methods.

2006-09-25T00:00:00Z Sosnovskiy, L. A. Bogdanovich, A. V. Сосновский, Л. А. Богданович, А. В. http://elartu.tntu.edu.ua/handle/123456789/16770 2017-06-06T07:30:46Z 2006-09-25T00:00:00Z

Назва: Диаграмма циклического упругопластического разрушения и живучесть элементов машин и конструкций Автори: Sosnovskiy, L. A.; Bogdanovich, A. V.; Сосновский, Л. А.; Богданович, А. В. Короткий огляд (реферат): The experimental method for the estimation of crack growth resistance of the structure and machine elements under cyclic elasto-plastic straining based on local plastic strain near the crack tip and assuming to receive the complex of the force and strain characteristics of crack growth resistance for plastic steels, is suggested. The basic fracture characteristics are obtained due to cyclic elasto-plastic fracture diagram as result of standard crack growth resistance tests and the measuring of the local plastic strain near the crack tip.

2006-09-25T00:00:00Z Похмурський, В. І. Хома, М. С. Винар, В. А. Наконечни, А. Pokhmurskii, V. I. Khoma, M. S. Bynar, V. A. Nakonechny, A. http://elartu.tntu.edu.ua/handle/123456789/16769 2017-06-06T07:30:37Z 2006-09-25T00:00:00Z

Назва: Вплив методів поверхневого пластичного деформування на особливості втомного та корозійно-втомного руйнування сплаву Д16Т Автори: Похмурський, В. І.; Хома, М. С.; Винар, В. А.; Наконечни, А.; Pokhmurskii, V. I.; Khoma, M. S.; Bynar, V. A.; Nakonechny, A. Короткий огляд (реферат): The influence of surface plastic deformation obtained by shot-peening and roller burnishing on the fatigue, corrosion fatigue of an aluminum alloy D16T was investigated. The investigations of fatigue and corrosion fatigue were conducted on the specimens with working part: diameter - 10 mm and length - 55 mm in air, 3% NaCl solution and distilled water with complete immersion of specimen. The base of research in air was practically conducted to 107 cycles and in corrosion environment to 5×107 cycles. Surface plastic deformation increases fatigue limit (s-1) of alloy D16T on 30 %, and corrosion fatigue limit (s-1c) on 20 % after shot-peening and 50 % after roller burnishing. Mechanism and character of alloys fracture under conditions of fatigue and corrosion fatigue are analysed.

2006-09-25T00:00:00Z Никифорчин, Григорій Миколайович Студент, О. З. Марков, А. Д. Nykyforchyn, G. M. Student, O. Z. Markov, A. D. http://elartu.tntu.edu.ua/handle/123456789/16768 2017-06-06T07:30:43Z 2006-09-25T00:00:00Z

Назва: Поріг циклічної тріщиностійкості як показник високотемпературної водневої деградації низьколегованих сталей енергетичного та нафтохімічного обладнання Автори: Никифорчин, Григорій Миколайович; Студент, О. З.; Марков, А. Д.; Nykyforchyn, G. M.; Student, O. Z.; Markov, A. D. Короткий огляд (реферат): In order to substantiate the choice of workability factor for the evaluation of mechanical state of metal, we have compared various mechanical factors by their sensitivity to hightemperature hydrogen degradation. Just local factors of fracture mechanics (such as fracture toughness and threshold Stress Intensity Factor) were found to be the most sensitive to such changes, and therefore subsequently Stress Intensity Factor was used as indicator of mechanical state of the metal with different degradation level. The inversion of effect of hydrogen, absorbed by degraded metal, on its effective threshold of cyclic crack resistance depending on number of thermocycles in hydrogen and exploitation time has been revealed. The metal state when negative effect of absorbed hydrogen on its effective threshold appears is suggested to be limiting.

2006-09-25T00:00:00Z Hakimi, Abdelhadi El Hariri, Said Laksimi, Abdelouahed Azari, Zitouni http://elartu.tntu.edu.ua/handle/123456789/16767 2017-06-06T07:30:41Z 2006-09-25T00:00:00Z

Назва: Defect in a cylindrical shell under pressure Автори: Hakimi, Abdelhadi El; Hariri, Said; Laksimi, Abdelouahed; Azari, Zitouni

2006-09-25T00:00:00Z Sunder, R. Сундер, Р. http://elartu.tntu.edu.ua/handle/123456789/16766 2017-06-06T07:28:57Z 2006-09-25T00:00:00Z

Назва: Унифицированная модель кинетики усталости при переменной амплитуде нагружения Автори: Sunder, R.; Сундер, Р. Короткий огляд (реферат): Усталость алюминиевых сплавов представляет собой процесс роста трещины с первого цикла нагружения, начиная с усталостным отделением вторичных частиц от матрицы. Этот процесс обладает стадийностью, связанной с механизмом местного микроскопического разрушения, приводящего к удлинению трещины. Идентифицированы пять явно отличающихся между собой механизмов. Некоторые из них очень чувствительны последовательности нагружения. Данная работа посвящена описанию разных механизмов удлинения трещины, характеристик их действия и определению интервалов степени удлинения трещины. Циклическое скольжение и пластическая деформация играют незначительную роль в определении долговечности. Наиболее опасную роль в ограничении долговечности играет хрупкое разрушение поверхности кончика трещины в связи с поверхностной химии, которой в свою очередь контролируют местные остаточные напряжения. Последнее также служит основным научным обоснованием эффекта среднего (или остаточного) напряжения в усталости. В будущих исследовательских работах, наибольшую актуальность представляют количественная оценка доли отдельных механизмов удлинения трещины и аналитическое моделирование самой работы механизмов, а также влияния на них предыстории нагружения. При этом, следует иметь в виду, что по мимо характеристики движущей силы трещины, особое внимание следует обращать на изменяемое сопротивления самого материала.

2006-09-25T00:00:00Z Ladislav, Várkoly http://elartu.tntu.edu.ua/handle/123456789/16765 2017-06-06T07:30:04Z 2006-09-25T00:00:00Z

Назва: Design index, U-function and its coefficients in life-time (PRE)determination of machine elements and machineries for dynamic loading Автори: Ladislav, Várkoly Короткий огляд (реферат): Topical problem described in presented paper is the guarantee and reliability of life-time prediction of structures made from dynamically loaded weldable steels. Author explains the principles of ”the new method” of classification of steels with acceptation of nondimensional design index Re / Rm in (pre)determination of machines elements for dynamic loading. Calculations for one, two and three parametric influence of carbon content, yield strength Re , tensile strength Rm and design index Re / Rm on load ratio critical value Rcrit using linear and non-linear statistic and statistical reliability fields are presented.

2006-09-25T00:00:00Z Yasniy, P. Pyndus, Yu. Fostyk, V. Shulgan, I. http://elartu.tntu.edu.ua/handle/123456789/16764 2017-06-06T07:35:08Z 2006-09-25T00:00:00Z

Назва: Fatigue crack growth. Overload and underload interactions Автори: Yasniy, P.; Pyndus, Yu.; Fostyk, V.; Shulgan, I. Короткий огляд (реферат): This article deals with the study of the overload- underload interactions effects on fatigue crack growth (FCG) rate. With the purpose of understanding of overload-underload interaction mechanisms the FEM modeling of stress-strain state at the crack tip was investigated. FCG tests with single tensile peak overloads and complex overloads- underloads have been performed in D16chT (analogue of American 2024 T3) aluminium alloy. Using the assumption of the principal role of residual stresses (as a result of plastic strain at crack tip) in crack growth retardation and acceleration, the FCG interaction model was developed. Based on the proposed FCG interaction model shows good correlation with calculated and experimental data.

2006-09-25T00:00:00Z Kocańda, D. Torzewski, J. http://elartu.tntu.edu.ua/handle/123456789/16763 2017-06-06T07:30:29Z 2006-09-25T00:00:00Z

Назва: Capability of load-time history reconstruction and fatigue crack growth rate estimation for 2024-T3 aluminium alloy on the basis of fractographic analysis Автори: Kocańda, D.; Torzewski, J. Короткий огляд (реферат): The subject of the paper is the considerations of the capability of load-time history reconstruction for the component under variable amplitude loading and fatigue crack growth rate estimation for the 2024-T3 Alclad aluminium alloy on the basis of microfracture analysis. For this goal three variable amplitude (VA) load sequences with multiple overloads and differing from the level of load sequence complexity were applied. These loads are employed when simulating the fatigue behaviour of aeronautical alloys. To reveal the load sequence effect on crack growth behaviour the microfracture analysis were provided by means of TEM microscope.

2006-09-25T00:00:00Z Tee, K. F. Christopher, C. J. James, M. N. Patterson, E. A. http://elartu.tntu.edu.ua/handle/123456789/16762 2017-06-06T07:30:12Z 2006-09-25T00:00:00Z

Назва: Mathematical study of the effects of applied stress, T-stress and back stress in photoelastic fringe patterns Автори: Tee, K. F.; Christopher, C. J.; James, M. N.; Patterson, E. A. Короткий огляд (реферат): This work is an attempt at developing a novel mathematical model to describe the stresses near the crack tip, taking into consideration the effects of plasticity. The focus is on describing how the applied stress normal to the crack, herein referred to as the K-stress, Tstress and ‘back stress’ induced by plasticity along the crack flank and in the crack tip plastic zone influence the crack tip elastic stress fields. The important features emerging from this study are that the sign and magnitude of each term can substantially alter the crack tip stress fields, and hence influence the photoelastic fringe patterns. To validate the mathematical model, polycarbonate compact tension specimens have been used and observed in a transmission polariscope in order to study the single effect of a pure ‘back stress’ (acting as an interfacial shear stress at the elastic-plastic boundary) and combination effects of K-stress, Tstress and ‘back stress’. It is observed that the fringe patterns obtained through experiment show good agreement with those derived by mathematical modelling.

2006-09-25T00:00:00Z Karolczuk, A. Macha, E. http://elartu.tntu.edu.ua/handle/123456789/16761 2017-06-06T07:35:20Z 2006-09-25T00:00:00Z

Назва: Critical plane approach in stage i and stage ii of fatigue under multiaxial loading Автори: Karolczuk, A.; Macha, E. Короткий огляд (реферат): This paper deals with the estimation problem of the critical plane orientation in multiaxial fatigue failure criteria. Experimental results from multiaxial proportional, nonproportional cyclic loading and variable-amplitude bending and torsion were used to determine the macroscopic fracture plane orientations and the fatigue lives. It was concluded that more important than macroscopic fracture plane orientation is the evolution (Stage I, Stage II) of fracture planes and an appropriate choice of the fatigue failure criterion for the fatigue life estimation.

2006-09-25T00:00:00Z Панасюк, В. В. Дмитрах, І. М. Panasyuk, V. V. Dmytrakh, I. M. http://elartu.tntu.edu.ua/handle/123456789/16760 2017-06-06T07:35:16Z 2006-09-25T00:00:00Z

Назва: Деякі підходи до оцінки корозійної втоми елементів конструкцій теплоенергетичного устаткування Автори: Панасюк, В. В.; Дмитрах, І. М.; Panasyuk, V. V.; Dmytrakh, I. M. Короткий огляд (реферат): Some approaches for assessment of corrosion fatigue of materials and structural components for power engineering equipment are presented. Here, the main attention was paid for so-called “non-traditional” damages which are not predicted by normative instructions and which are occurred as result of long time of exploitation or as result of different reflections of operating regimes of equipment. Methods for strength and durability assessment of materials and structural elements are stated on the fracture mechanics basis. Expert assessment of technical state of heat-and-power engineering equipment is considered with taken into account of the actual data of metal properties and operating conditions of equipment.

2006-09-25T00:00:00Z Troshchenko, V. T. Khamaza, L. A. Трощенко, В. Т. Хамаза, Л. А. http://elartu.tntu.edu.ua/handle/123456789/16759 2017-06-06T07:29:10Z 2006-09-25T00:00:00Z

Назва: Усталость и неупругость металлов Автори: Troshchenko, V. T.; Khamaza, L. A.; Трощенко, В. Т.; Хамаза, Л. А. Короткий огляд (реферат): A method for the investigation of high-cycle fatigue and inelasticity of metals under conditions of symmetric cyclic loading in tension-compression, bending and torsion is described. A procedure for the calculation of true stresses and inelastic cyclic strains in surface layers under nonuniform stress conditions (bending, torsion) is proposed. A large group of steels has been studied and it is shown that the use of inelastic cyclic strains at the stage of stabilization of the deformation process as a measure of the fatigue damage accumulation intensity makes it possible to explain some general laws of high-cycle fatigue, including the influence of stress gradient, load biaxiality, befrequency character of loading, loading frequency on the fatigue behaviour.

2006-09-25T00:00:00Z Трощенко, В. Т. Troshchenko, V. T. http://elartu.tntu.edu.ua/handle/123456789/16758 2017-06-06T07:35:09Z 2006-09-25T00:00:00Z

Назва: Передмова Автори: Трощенко, В. Т.; Troshchenko, V. T.

2006-09-25T00:00:00Z http://elartu.tntu.edu.ua/handle/123456789/16757 2017-06-06T07:35:06Z 2006-09-25T00:00:00Z

Назва: Редакційні сторінки

2006-09-25T00:00:00Z http://elartu.tntu.edu.ua/handle/123456789/15804 2017-06-06T04:11:05Z 2006-09-25T00:00:00Z

Назва: Механічна втома металів. Праці 13-го міжнародного колоквіуму (МВМ-2006) Короткий огляд (реферат): The book comprises the papers presented at the 13-th International Colloquium “Mechanical Fatigue of Metals” (Ternopil, September 25-28, 2006) which consider the following problems: Physical and phenomenological approaches to the description of the fatigue damage; Environmental (corrosive medium, temperature, loading waveform, etc.) effects on the fatigue crack propagation; Fatigue strength with allowance for the effect of manufacturing, design, and operational factors; Fatigue life of machines details.; У збірнику висвітлені доповіді 13-го Міжнародного колоквіуму "Механічна втома металів" (Тернопіль, 25-28 вересня 2006 р.). Розглянуто наступні питання: фізичні та феноменологічні підходи до опису втомного пошкодження; розвиток втомних тріщин із урахуванням впливу корозійного середовища, температури, виду навантаження та інших факторів; опір втомі з урахуванням впливу технологічних, конструктивних та експлуатаційних факторів; втомна довговічність деталей машин.; В сборник включены доклады 13-го Международного коллоквиума "Механическая усталость металлов" (Тернополь, 25-28 сентября 2006 р.). Рассмлтрены следующие вопросы: физические и феноменологические подходы к описанию усталостного повреждения; развитие усталостных трещин с учётом влияния коррозионной среды, температуры, вида нагружения и других факторов; сопротивление усталости с учётом влияния технологических, конструктивных и эксплуатационных факторов; усталостная долговечность деталей машин.

2006-09-25T00:00:00Z