بررسی توزیع مجدد تنش پسماند کششی مکانیکی بر اثر رشد ترک خستگی

علوم کاربردی و محاسباتی در مکانیک

مقاله 1، دوره 27، شماره 2 - شماره پیاپی 14، شهریور 1395، صفحه 1-10   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/fum_mech.v27i2.38657

نویسندگان

محمد نوقابی^{* 1}؛ ایرج ستاری فر²؛ حسین حسینی تودشکی²

¹دانشگاه صنعتی امیرکبیر

²صنعتی امیرکبیر

چکیده

در این پژوهش، اثر بارگذاری خستگی بر توزیع مجدد تنش‌های پسماند مکانیکی در نمونه‌های کششی فشرده بررسی شده است. آزمون‌های تجربی رشد ترک خستگی طبق استاندارد E647 برای نمونه‌های بدون تنش پسماند اولیه و هم‌چنین نمونه‌های دارای تنش پسماند مکانیکی انجام گرفت. برای بررسی ناحیۀ پلاستیک نوک ترک و هم‌چنین به‌دست آوردن پارامترهای مکانیک شکست از تحلیل المان محدود به‌کمک نرم‌افزار المان محدود آباکوس استفاده شد. نتایج بررسی‌ها نشان داد که تنش پسماند اولیه پس از چند سیکل بارگذاری خستگی، توزیع مجدد می‌یابد که نحوۀ توزیع مجدد آن وابسته به سطح تنش پسماند اولیه و دامنۀ بارگذاری سیکلی می‌باشد. مساحت منطقۀ پلاستیک نوک ترک نیز با شروع بارگذاری خستگی کاهش می‌یابد و پس از تعداد محدودی سیکل، اندازۀ آن پایدار می‌گردد. در آزمون‌های تجربی، عمر خستگی نمونه‌های دارای تنش پسماند مکانیکی کمتر از عمر خستگی نمونه‌های بدون تنش پسماند به‌دست آمد.

کلیدواژه‌ها

رشد ترک خستگی؛ ناحیه پلاستیک نوک ترک؛ توزیع مجدد تنش پسماند؛ انتگرال J

سایر فایل های مرتبط با مقاله

EditNoMarkup.EA-1noghabi.pdf

مراجع

1. Bucci, R.J., "Effect of residual stress on fatigue crack growth rate measurement", ASTM STP, Vol. 743, pp. 28–47, (1981).

2. McClung, R.C., "A literature survey on the stability and significance of residual stresses during fatigue", Fatigue Fract. Engng. Mater. Struct., Vol. 30, pp. 173–205, (2007).

3. Vaidya, W.V., Staron, P. and Horstmann, M., "Fatigue crack propagation into the residual stress field along and perpendicular to laser beam butt-weld in aluminium alloy AA6056", Fatigue Fract Engng Mater Struct, Vol. 35, 399–411, (2011).

4. Maddox, S.J., "Fatigue strength of welded structures", Abington Publishing; (1991).

5. Withers, P.J., "Residual stress and its role in failure", Rep Prog Phys, Vol. 70, pp. 2211–2264, (2007).

6. Barsoum, Z., Barsoum, I., "Residual stress effects on fatigue life of welded structures using LEFM", Engineering Failure Analysis, Vol. 16, pp. 449–467, (2009).

7. LaRue, J.E. and Daniewicz, S.R., "Predicting the effect of residual stress on fatigue crack growth", International Journal of Fatigue, Vol. 29, pp. 508–515, (2007).

8. Servetti, G. and Zhang, X., "Predicting fatigue crack growth rate in a welded butt joint: The role of effective R ratio in accounting for residual stress effect", Engineering Fracture Mechanics, Vol. 76, pp. 1589–1602, (2009).

9. Ghidini, T. and Dalle Donne, C., "Fatigue crack propagation assessment based on residual stresses obtained through cut-compliance technique", Fatigue Fract Engng Mater Struct, Vol. 30, pp.

214–222, (2006).

10. Bussu, G. and Irving, P.E., "The role of residual stress and heat affected zone properties on fatigue crack propagation in friction stir welded 2024-T351 aluminum joints", International Journal of Fatigue, Vol. 25, pp. 77–88, (2003).

11. Farrahi, G.H., Majzoobi, G.H., Hosseinzadeh, F. and Harati, S.M., "Experimental evaluation of the effect of residual stress field on crack growth behaviour in C(T) specimen", Engineering Fracture Mechanics, Vol. 73, pp. 1772–1782, (2006).

12. Wenman, M.R., Price, A.J., Steuwer, A., Chard-Tuckey, P.R. and Crocombe, A., "Modelling and experimental characterisation of a residual stress field in a ferritic compact tension specimen", International Journal of Pressure Vessels and Piping, Vol. 86, pp. 830–837, (2009).

13. Semari, Z., Aid, A., Benhamena, A., Amrouche, A., Benguediab, M., Sadok, A. and Benseddiq, N., "Effect of residual stresses induced by cold expansion on the crack growth in 6082 aluminum alloy", Engineering Fracture Mechanics, Vol. 99, pp. 159–168, (2013).

14. Wahab, M.A., Rohrsheim, G.R. and Park, J.H., "Experimental study on the influence of overload induced residual stress field on fatigue crack growth in aluminium alloy", Journal of Materials Processing Technology, Vol. 153–154, pp. 945–951, (2004).

15. Stuart, D.H., Hill, M.R. and Newman, J.C., "Correlation of one-dimensional fatigue crack growth at cold-expanded holes using linear fracture mechanics and superposition", Engineering Fracture Mechanics, Vol. 78, pp. 1389–1406, (2011).

16. Lammi, C.J. and Lados, D.A., "Numerical predictions and experimental measurements of residual", Engineering Fracture Mechanics, Vol.78, pp. 1114–1124, (2011).

17. Parker, A.P., "Stress intensity factors, crack profiles, and fatigue crack growth rates in residual stress fields". In: Residual stress effects in fatigue, ASTM STP 776, American Society for Testing and Materials, p. 13–31, (1982).

18. Itoh, Y.Z., Suruga, S. and Kashiwaya, H., "Prediction of fatigue crack growth rate in welding residual stress field", Engineering Fracture Mechanics, pp. 397–407, (1989).

19. Beghini, M., Bertini, L. and Vitale, E., "Fatigue crack growth in residual stress fields: experimental results and modeling, Fatigue Fract Engng Mater Struct", Vol. 17, pp. 1433–1444, (1994).

20. Liljedahl, C.D.M, Tan, M.L., Zanellato, O., Ganguly, S., Fitzpatrick, M.E. and Edwards, L., "Evolution of residual stresses with fatigue loading and subsequent crack growth in a welded aluminum alloy middle tension specimen", Engineering Fracture Mechanics, Vol. 75, pp. 3881–3894, (2008).

21. EN 13445-3, Unfired pressure vessels part 3: Design, European Standard, (2002).

22. ASTM E647-00, Standard test method for measurement of fatigue crack growth rates, Annual Book of ASTM Standards, Vol. 03.01, pp. 603–644, (2002).

23. Anderson, T.L., "Fracture Mechanics Fundamentals and Applications", Third Edition, Boca Raton: Tylor & Francis Group, (2005).

24. Abaqus, D.S., Ver, 6.12. Dassault Systèmes Simulia Corp., Providence, RI, USA, 2012.

25. Abdelaziz, Y., Benkheira, S., Rikioui, T. and Mekkaoui, A., "A double degenerated finite element for modeling the crack tip singularity", Applied Mathematical Modelling, Vol. 34, pp. 4031–4039, (2010).

26. Mirzaee-Sisan, A., Truman, C.E., Smith, D.J. and Smith, M.C., "Interaction of residual stress with mechanical loading in an austenitic stainless steel", Fatigue Fract Engng Mater Struct, Vol. 31, pp. 223–233, (2007).

27. Solanki, K., Daniewicz, S.R. and Newman, J.C., "Finite element analysis of plasticity induced fatigue crack closure: an overview", Engineering Fracture Mechanics, Vol. 71, pp. 149–171, (2004).

28. Solanki, K., Daniewicz, S.R. and Newman, J.C., "Finite element modeling of plasticity-induced crack closure with emphasis on geometry and mesh refinement effects", Engineering Fracture Mechanics, Vol. 70, No. 12, pp. 1475-1489, (2003).

29. ASTM E1820-01, Standard test method for measurement of fracture toughness, Annual Book of ASTM Standards, Vol. 03.01, pp. 1031–1076, (2001).

30. Benedetti, M., Fontanari, V., Scardi, P., Ricardo, C.L.A. and Bandini, M., Reverse bending fatigue of shot peened 7075-T651 aluminium alloy: The role of residual stress relaxation, "International Journal of Fatigue", Vol. 31, pp. 1225–1236, (2009).

31. Zhuang, W.Z. and Halford, G.R., "Investigation of residual stress relaxation under cyclic load", International Journal of Fatigue, Vol. 23, pp. 31–37, (2001).