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A notch methodology to estimate fretting fatigue strength

机译:估算微动疲劳强度的缺口方法

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The aim of this work is to propose a methodology to estimate the fatigue limit of cylindrical contacts under a partial slip regime. Taylor?s point stress method, usually applied to estimate fatigue limit for notched structures, was associated with the Modified W?hler Curves to define the fretting crack initiation threshold methodology. Twenty-nine tests on cylindrical contacts were selected from the literature and considered to evaluate the quality of the estimates. The results agree well for twenty-three experimental data. As the fatigue limit under fully reversed bending is the fatigue parameter usually available for most metallic alloys, it was also showed how the second fatigue limit needed to calibrate the proposed procedure could be estimated by taking full advantage from other standard predictive methodologies previously devised to estimate the mean stress effect under uniaxial fatigue loading.
机译:这项工作的目的是提出一种方法来估算部分滑动状态下圆柱接触的疲劳极限。泰勒点应力法通常用于估计缺口结构的疲劳极限,它与修正的沃勒曲线定义微动裂纹萌生阈值方法有关。从文献中选择了29个圆柱接触试验,并考虑用来评估估计的质量。结果与23个实验数据吻合良好。由于在完全反向弯曲下的疲劳极限是大多数金属合金通常可获得的疲劳参数,因此还显示了如何通过充分利用先前设计用于估算的其他标准预测方法来估算校准建议的过程所需的第二疲劳极限单轴疲劳载荷下的平均应力效应。

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