Запис Детальніше

Переривчасте руйнування та характерні стани тріщини

CUNTUR

Переглянути архів Інформація
 
 
Поле Співвідношення
 
Title Переривчасте руйнування та характерні стани тріщини
Discontinuous failure and characteristic crack states
 
Creator Ліманський, Ігор Валентинович
Кравчук, Роман Васильович
Naumenko, I.
Limansky, V.
Kravchuk, R.
 
Subject переривчасте руйнування
тонколистові метали
діаграми стрибкоподібного росту тріщин
залежності вимірюваних змінних від часу
характерні стани тріщини
discontinuous failure
shit metals
step-wise crack grows diagrams
time dependence of the measured variables
characteristic crack states
539.421
 
Description Розроблено методику експериментального дослідження стрибкоподібного росту наскрізної тріщини в листових металах. Встановлено, що пружно-пластичне руйнування тонколистового алюмінієвого сплаву в умовах загальної текучості являє собою процес переривчастої зміни поздовжніх і поперечних розмірів порожнини тріщини. Запропонований новий підхід до опрацювання та інтерпретації даних про переривчасте руйнування зразків з центральним отвором при одновісному розтягу, що базується на аналізі діаграм зміни параметрів експерименту в часі. Розглянуто процедуру отримання мінімально необхідного набору даних, що дозволяє визначати характерні стани стрибкоподібно зростаючої тріщини. Показано, яким чином результати даної роботи можуть бути використані при оцінюванні руйнування високонавантажених деталей, що містять відносно короткі наскрізні вирізи.
The paper is devoted to the development of procedure for obtaining, processing and interpreting of the initial data on step-wise propagation of the through crack in the rectangular plate with a central opening under uniaxial tension. It is assumed that use of this procedure makes it possible to evaluate (separately) the local effects, which deal with to the crack propagation within the fracture development zone, and the effects, which deal with to the global plastic deformation of the specimen in question. The primary problems on the way to such procedure are the following: 1) Decision on configuration and dimensions of the specimen having an initial stress concentrator, which enables one to obtain the experimental diagrams with a sufficiently extended region of the step-wise growth of the crack; 2) Determination of the loading rate range that is consistent with quasi-static development of the specimen fracture process; 3) Determination of the minimally required set of initial data and their presentation, which simplifies the analysis of experimental data and, simultaneously, enhances their accuracy; 4) Determination of specific states for the crack tip region and justification of the field of possible practical use of the results.
It was found that the preferred configuration of the specimen for investigation on discontinuous fracture is the rectangular plate, which undergoes fracture under conditions close to those for transverse plane strain. A circular hole with a relatively smaller diameter of 2r0 is situated in the center of the plate with a ratio of 2H0 (height) to 2W0 (width) which equals 0,1. It is shown that with velocity of the active grip which equals or is less than 0,001 mm/sec, the experimental diagrams covering sufficiently extended regions of discontinuous fracture. The analysis of the time dependences of the registered variables demonstrates that each crack step can be described using six specific conditions for its tip region. Among them there are such conditions, which can be used in solution of two basic problems that are important from the practical point of view. The paper presents the results of tests and their ways of use in the estimation of fracture of highly loaded components with relatively short through cracks.
 
Date 2015-07-15T09:50:15Z
2015-07-15T09:50:15Z
2014-12-18
2014-12-18
 
Type Article
 
Identifier Науменко В.П. Переривчасте руйнування та характерні стани тріщини / В.П. Науменко, І. Ліманський, Р. Кравчук // Вісник ТНТУ — Тернопіль : ТНТУ, 2014. — Том 76. — № 4. — С. 21-33. — (Механіка та матеріалознавство).
1727-7108
http://elartu.tntu.edu.ua/handle/123456789/5726
Naumenko V.P. Discontinuous failure and characteristic crack states / V.P. Naumenko, V. Limansky, R. Kravchuk // Bulletin of TNTU — Ternopil : TNTU, 2014. — Volume 76. — No 4. — P. 21-33. — (Mechanics and materials science).
 
Language uk
 
Relation 1. E561–92a. Standard practice for R–curve determination // ASTM. – 1992. – 13 р.
2. E2472–06e1. Standard test method for determination of resistance to stable crack extension under low– constraint conditions // ASTM. – 2011. – 26 p.
3. ISO 22889, Metallic materials – Method of test for the determination of resistance to stable crack extension using specimens of low constraint // ISO Standard, 2007. – 30 p.
4. Rice, J.R. An examination of the fracture mechanics energy balance from the point of view of continuum mechanics [Text] / J.R. Rice // Proc. 1st Intern. Conf. Fracture, Sendai, Japan. – 1966. – 1. – P.309–340.
5. Kfouri, A.P. Crack separation energy rate for crack advance in elastic–plastic fracture mechanics [Text] / A.P. Kfouri, K.J. Miller // Proc. Inst. Mech. Engrs. – 1976. – 190. – P.571–584.
6. Kfouri, A.P. Elastic–plastic separation energy rate for crack advance in finite growth steps [Text] / A.P. Kfouri, J.R. Rice// in Fracture 1977. – D.M.R. Taplin. – vol.1. – Univ. Waterloo Press. – P.43–59.
7. Wadier, Y. Reconsidering the paradox of Rice for a linear strain hardening material [Text] / Y. Wadier // Intern. J. Fracture. – 2004. – 127. – P.L125–L132.
8. Neimitz, A. Jump–like crack growth models or theory of critical distances: Are they correct? [Text] / A. Neimitz //ESIS Newsletter#4. – 2008. – P.20–26.
9. Taylor, D. The theory of critical distances [Text] / D. Taylor // Eng. Fract. Mech. – 2008. – 75. – P.1696– 1705.
10. Neimitz, A. The jump–like crack growth model, the estimation of fracture energy and JR curve [Text] / A. Neimitz // Eng. Fract. Mech. – 2008.–75. – P.236–252.
11. Kfouri, A.P. Characteristic crack–tip distances in fracture criteria: Is crack propagation discontinious? [Text] / A.P. Kfouri // Eng. Fract. Mech. – 2008. – 75. – P.1815–1828.
12. Naumenko, V.P. Displacement–based assessment of ductile tearing under low–constraint conditions [Text] / V.P. Naumenko, S.V. Lenzion, I.V. Limansky // The Open Mechanical Engineering Journal. – 2008. – 2. – P.40–59.
13. Naumenko, V.P. Energy–based assessment of ductile tearing in a thin sheet aluminium alloy [Text] / V.P. Naumenko, I.V. Limansky // Procedia Engineering. – 2009. – 1. – issue 1. – P.63–66.
14. Naumenko, V.P. Through–life assessment of ductile tearing under low–constraint conditions [Text] / V.P. Naumenko // Proc. of 12th International Conference on Fracture. – Ottawa. – 2009. – 10 pages.
15. Naumenko, V.P. Incorporation of length scales in plane stress fracture analysis [Text] / V.P. Naumenko // Proc. of the ECF16 Fracture of Nano and Engineering Mat. and Struct. Ed. E.E. Gdoutos, Alexandropoulos, Greece. – 2006.
16. Naumenko, V.P. Sensitivity of crack nucleation parameters to the geometric imperfection [Text] / V.P. Naumenko, Yu. D. Skrypnyk // Proc. ECF16 Fracture of Nano and Engineering Materials and Structures, E. E. Gdoutos, Ed. Alexandropoulos, Greece. – 2006.
17. Naumenko, V.P. Comprehensive Assessment of a Naturally Forming Tear Crack in Thin–Sheet Aluminium Alloy [Text] / V.P. Naumenko, S.V. Lenzion // Proceedings of the ESIA8 Conf. on Through–life Management of Structures, Manchester, UK. – 2006.
18. Naumenko, V.P. Ductile tearing in narrow and wide strips of thin–sheet aluminium alloy [Text] / V.P. Naumenko, S.V. Lenzion, Yu. D. Skrypnyk // Proc. ESIA8 Through–life Management of Struct. Comp., Manchester, – 2006. – 10 pages.
19. Bao, Y. Dependence of ductile crack formation in tensile tests on stress triaxiality, stress and strain ratios [Text] / Y. Bao // Eng. Fract. Mech. – 2005. – 72. – P.505–522.
20. Wierzbicki, T. Calibration and evaluation of seven fracture models [Text] / T. Wierzbicki, Y. Bao, Y– W. Lee, Y. Bai // Intern. J. Mech. Sciences. – 2005. – 47. – P.719–743.
21. Beese, A. Partially coupled anisotropic fracture model of aluminum sheets [Text] / A. Beese, M. Luo, Y. Bai, T. Wierzbicki // Eng. Fract. Mech. – 2010. – 77. – P.1128–1152.
22. Canon PowerShot G7. Руководство пользователя // CEL–SG2EA200 – 2006. – 170 с.
23. Науменко, В.П. Сопротивление разрушению листовых металлов и тонкостенных конструкций. Сообщение 2. Задачи исследования, предпосылки и основополагающие новшества [Текст] / В.П. Науменко, И.В. Лиманский // Пробл. прочности. – 2014.– No6. – С.25–49.
24. Kim, Y.–J. Relevance of plastic limit loads to reference stress approach for surface cracked cylinder problems [Text] / Y.–J. Kim, D.–J. Shim // Int. J, Press, Vess. Piping. –2005. – 82. – P.687–699.
25. Zerbst, U. Proposed extension of the SINTAP/FITNET thin wall option based on a simple method for reference load determination [Text] / U. Zerbst, A. Pempe, I. Scheider, R.A. Ainsworth, W. Schonfeld // Engineering Fracture Mechanics. – 2009.–76. – P.74–87.
1. E561–92a. Standard practice for R–curve determination // ASTM. – 1992. – 13 p.
2. E2472–06e1. Standard test method for determination of resistance to stable crack extension under low– constraint conditions // ASTM. – 2011. – 26 p.
3. ISO 22889, Metallic materials – Method of test for the determination of resistance to stable crack extension using specimens of low constraint // ISO Standard, 2007. – 30 p.
4. Rice, J.R. An examination of the fracture mechanics energy balance from the point of view of continuum mechanics [Text] / J.R. Rice // Proc. 1st Intern. Conf. Fracture, Sendai, Japan. – 1966. – 1. – P.309–340.
5. Kfouri, A.P. Crack separation energy rate for crack advance in elastic–plastic fracture mechanics [Text] / A.P. Kfouri, K.J. Miller // Proc. Inst. Mech. Engrs. – 1976. – 190. – P.571–584.
6. Kfouri, A.P. Elastic–plastic separation energy rate for crack advance in finite growth steps [Text] / A.P. Kfouri, J.R. Rice// in Fracture 1977. – D.M.R. Taplin. – vol.1. – Univ. Waterloo Press. – P.43–59.
7. Wadier, Y. Reconsidering the paradox of Rice for a linear strain hardening material [Text] / Y. Wadier // Intern. J. Fracture. – 2004. – 127. – P.L125–L132.
8. Neimitz, A. Jump–like crack growth models or theory of critical distances: Are they correct? [Text] / A. Neimitz //ESIS Newsletter#4. – 2008. – P.20–26.
9. Taylor, D. The theory of critical distances [Text] / D. Taylor // Eng. Fract. Mech. – 2008. – 75. – P.1696– 1705.
10. Neimitz, A. The jump–like crack growth model, the estimation of fracture energy and JR curve [Text] / A. Neimitz // Eng. Fract. Mech. – 2008.–75. – P.236–252.
11. Kfouri, A.P. Characteristic crack–tip distances in fracture criteria: Is crack propagation discontinious? [Text] / A.P. Kfouri // Eng. Fract. Mech. – 2008. – 75. – P.1815–1828.
12. Naumenko, V.P. Displacement–based assessment of ductile tearing under low–constraint conditions [Text] / V.P. Naumenko, S.V. Lenzion, I.V. Limansky // The Open Mechanical Engineering Journal. – 2008. – 2. – P.40–59.
13. Naumenko, V.P. Energy–based assessment of ductile tearing in a thin sheet aluminium alloy [Text] / V.P. Naumenko, I.V. Limansky // Procedia Engineering. – 2009. – 1. – issue 1. – P.63–66.
14. Naumenko, V.P. Through–life assessment of ductile tearing under low–constraint conditions [Text] / V.P. Naumenko // Proc. of 12th International Conference on Fracture. – Ottawa. – 2009. – 10 pages.
15. Naumenko, V.P. Incorporation of length scales in plane stress fracture analysis [Text] / V.P. Naumenko // Proc. of the ECF16 Fracture of Nano and Engineering Mat. and Struct. Ed. E.E. Gdoutos, Alexandropoulos, Greece. – 2006.
16. Naumenko, V.P. Sensitivity of crack nucleation parameters to the geometric imperfection [Text] / V.P. Naumenko, Yu. D. Skrypnyk // Proc. ECF16 Fracture of Nano and Engineering Materials and Structures, E. E. Gdoutos, Ed. Alexandropoulos, Greece. – 2006.
17. Naumenko, V.P. Comprehensive Assessment of a Naturally Forming Tear Crack in Thin–Sheet Aluminium Alloy [Text] / V.P. Naumenko, S.V. Lenzion // Proceedings of the ESIA8 Conf. on Through–life Management of Structures, Manchester, UK. – 2006.
18. Naumenko, V.P. Ductile tearing in narrow and wide strips of thin–sheet aluminium alloy [Text] / V.P. Naumenko, S.V. Lenzion, Yu. D. Skrypnyk // Proc. ESIA8 Through–life Management of Struct. Comp., Manchester, – 2006. – 10 pages.
19. Bao, Y. Dependence of ductile crack formation in tensile tests on stress triaxiality, stress and strain ratios [Text] / Y. Bao // Eng. Fract. Mech. – 2005. – 72. – P.505–522.
20. Wierzbicki, T. Calibration and evaluation of seven fracture models [Text] / T. Wierzbicki, Y. Bao, Y– W. Lee, Y. Bai // Intern. J. Mech. Sciences. – 2005. – 47. – P.719–743.
21. Beese, A. Partially coupled anisotropic fracture model of aluminum sheets [Text] / A. Beese, M. Luo, Y. Bai, T. Wierzbicki // Eng. Fract. Mech. – 2010. – 77. – P.1128–1152.
22. Canon PowerShot G7. Rukovodstvo polzovatelia // CEL–SG2EA200 – 2006. – 170 p.
23. Naumenko, V.P. Soprotivlenie razrusheniiu listovykh metallov i tonkostennykh konstruktsii. Soobshchenie 2. Zadachi issledovaniia, predposylki i osnovopolahaiushchie novshestva [Text] / V.P. Naumenko, I.V. Limanskii // Probl. prochnosti. – 2014.– No6. – P.25–49.
24. Kim, Y.–J. Relevance of plastic limit loads to reference stress approach for surface cracked cylinder problems [Text] / Y.–J. Kim, D.–J. Shim // Int. J, Press, Vess. Piping. –2005. – 82. – P.687–699.
25. Zerbst, U. Proposed extension of the SINTAP/FITNET thin wall option based on a simple method for reference load determination [Text] / U. Zerbst, A. Pempe, I. Scheider, R.A. Ainsworth, W. Schonfeld // Engineering Fracture Mechanics. – 2009.–76. – P.74–87.
 
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