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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >BLOCK CYCLE FATIGUE LIFE SIMULATION AND CORRELATION WITH TEST FOR AN AUTOMOTIVE HOOD LATCH-SUPPORTING COMPONENT
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BLOCK CYCLE FATIGUE LIFE SIMULATION AND CORRELATION WITH TEST FOR AN AUTOMOTIVE HOOD LATCH-SUPPORTING COMPONENT

机译：汽车锁闩组件的周期疲劳寿命模拟及与测试的相关性

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摘要

This paper describes the durability analysis procedure and fatigue life simulation of an automotive hood latch-supporting component under block cycle loads. The first step is to apply linear stress analysis to identify the regions with high possibility of failure. The bent cove section of the latch support and the upper bolt-edge on a tie bar connecting to the latch support are determined as the critical regions. The strain-life/signed von Mises stress approach is then used to perform the fatigue analysis at these critical regions. The predicted fatigue life is about 3 times of the experimental one. However, the experiment shows that a crack appears exactly at the bent cove section of the latch support as simulation predicted. This project also serves as a case study to the students in predicting fatigue failure of a real industrial part.
机译：本文描述了汽车发动机罩闩锁支撑部件在大块循环载荷下的耐久性分析程序和疲劳寿命仿真。第一步是应用线性应力分析，以识别出现故障可能性较高的区域。闩锁支座的弯曲凹部和连接到闩锁支座的拉杆上的上螺栓边缘确定为关键区域。然后使用应变寿命/有符号的冯·米塞斯应力方法在这些关键区域进行疲劳分析。预计的疲劳寿命约为实验寿命的3倍。然而，实验表明，正如模拟预测的那样，裂纹恰好出现在闩锁支撑的弯曲凹部处。该项目还为学生提供了一个案例研究，以预测实际工业零件的疲劳失效。

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