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首页> 外文会议>Eighth International Fatigue Congress Vol.5, Jun 3-7, 2002, Stockholm, Sweden >THE EFFECT OF CRACK SHAPE ON THE FATIGUE ASSESSMENT OF 3D STRESS CONCENTRATIONS
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THE EFFECT OF CRACK SHAPE ON THE FATIGUE ASSESSMENT OF 3D STRESS CONCENTRATIONS

机译：裂纹形状对3D应力集中度疲劳评估的影响

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摘要

Complex three-dimensional stress concentrations, such as weld ends, present problems for most fatigue analysis procedures, the results of which are typically very conservative. This paper is an investigation of a possible explanation for this. It is postulated that the shape of small, non-propagating cracks can affect fatigue life and that this is not accounted for by most assessment methods. A simple correction factor, based on the crack shape factor, is presented. It is shown that this correction improves the accuracy of predictions made for a component feature using the critical distance methods advocated by the authors and also when using the more traditional Peterson and Neuber methods.
机译：复杂的三维应力集中（例如焊缝末端）在大多数疲劳分析过程中都存在问题，其结果通常非常保守。本文是对此可能解释的调查。据推测，小的，不扩展的裂纹的形状会影响疲劳寿命，而大多数评估方法并未考虑到这一点。提出了基于裂纹形状因子的简单校正因子。结果表明，使用作者提倡的临界距离方法以及使用更传统的Peterson和Neuber方法时，这种校正可以提高对零件特征进行预测的准确性。

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