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- 题名/责任者:
- Fracture mechanics analysis of the effects of residual stress on fatigue life / Joseph F.Throop.
- 出版发行项:
- [S.l. : Defense Technical Information Center], 1982.
- 载体形态项:
- 15 p. : ill. ; 26 cm.
- 个人责任者:
- Throop, J. F.
- 附加团体名称:
- United States. Army Armament Research and Development Command.
- 论题主题:
- Mechanics.
- 中图法分类号:
- TG113
- 一般附注:
- Technical report ARLCB-TR-82020.
- 书目附注:
- Includes bibliographical references.
- 摘要附注:
- It is re-emphasized here that the effect of residual stress in fatigue is analogous to but not the same as the mean stress effect from applied loads. The inclusion of a residual stress term in the stress intensity factor range of the fatigue crack propagation rate equation permits one to use the residual stress in calculations of fatigue life estimates. Using crack shape factors calculated for given aspect ratios of surface flaws and integrating da/dN, one obtains an equation for the S-N curve which includes the residual stress effect on fatigue performance. This process of calculation reveals that compressive residual stress has a much stronger influence on fatigue life than tensile residual stress does, mainly because the former decreases the stress intensity factor range and increases the critical crack size while the latter only decreases the critical crack size. Numerical solution of an example illustrates an application of these concepts.
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