Investigation of roughness induced crack closure effects in fatigue

机译：粗糙度引起的疲劳裂纹闭合效应研究

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The incidence of roughness induced fatigue crack closure has been studied by finite element modelling. Results show an increasing effect of crack path angle on closure levels with the closure mechanism being strongly dependent on residual plastic strains in the wake rather than global shear displacements of the fracture surfaces. An analytical expression for the functional dependence of roughness induced closure has been produced which showws reasonable agreement with the finite element results.

机译：通过有限元建模研究了粗糙度引起的疲劳裂纹闭合的发生率。结果表明，裂纹路径角度对闭合水平的影响增加，闭合机制在很大程度上取决于尾流中的残余塑性应变，而不是断裂表面的整体剪切位移。产生了粗糙度引起的闭合的功能依赖性的解析表达式，该表达式与有限元结果显示出合理的一致性。

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来源
《Sixth International Conference on Damage and Fracture Mechanics: Computer Aided Assessment and Control 2000 Nontreal, Canada,》|2000年|p.313-322|共10页
会议地点 Montreal(CA)
作者
M.R. Parry; S. Syngellakis; I. Sinclair;
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正文语种 eng
中图分类一般工业技术;
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Investigation of roughness induced crack closure effects in fatigue

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