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首页> 外文会议>Annual Meeting of the JSME/MMD >A Method for Predicting Fatigue Life of Three-Dimensional Slant Crack and Its Propagating Path Based on Finite Element Propagation Simulation Considering Partial Elastic Contact of Crack Surfaces
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A Method for Predicting Fatigue Life of Three-Dimensional Slant Crack and Its Propagating Path Based on Finite Element Propagation Simulation Considering Partial Elastic Contact of Crack Surfaces

机译：一种预测三维倾斜裂纹的疲劳寿命及其基于有限元传播模拟考虑裂缝表面的部分弹性接触的有限元传播模拟

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In residual stress fields, sometimes the so-called partial elastic contact of crack surfaces occurs, where fatigue crack is closed at the crack mouth while it is open at crack tip. The partial elastic contact has significant effect on lives of fatigue cracks. However there are few studies on the partial elastic contact of crack surfaces for three-dimensional cracks. In this paper, the propagation paths and lives of fatigue cracks were predicted by using three-dimensional fatigue crack propagation simulations considering the partial elastic contact of crack surfaces. The finite element method was employed for these simulations. The results of simulations considering the partial elastic contact of crack surfaces differed from those neglecting the contact, demonstrating the necessity of simulation considering the partial elastic contact of crack surfaces.
机译：在残余应力场中，有时发生裂缝表面的所谓的部分弹性接触，其中疲劳裂纹在裂缝口处闭合，而在裂纹尖端开口。部分弹性接触对疲劳裂缝的寿命具有显着影响。然而，关于三维裂缝的裂缝表面的部分弹性接触的研究很少。本文通过考虑裂缝表面的部分弹性接触，通过使用三维疲劳裂纹传播模拟预测疲劳裂缝的传播路径和寿命。采用有限元法用于这些模拟。考虑裂缝表面的部分弹性接触的模拟结果与忽略接触的部分不同，展示了考虑裂缝表面的部分弹性接触的模拟的必要性。

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