| 轿车设计中的焊点疲劳寿命预测方法 |
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| 引用本文： | 叶远林.轿车设计中的焊点疲劳寿命预测方法[J].计算机辅助工程,2006,15(Z1):189-192. |
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| 作者姓名： | 叶远林 |
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| 作者单位： | 奇瑞汽车有限公司,乘用车工程研究院,安徽,芜湖,241009 |
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| 摘 要： | 介绍一种焊点疲劳寿命预测的工程计算方法. 用有限元分析中的CWELD单元模拟焊核,用壳单元模拟连接板,根据CWELD单元传递力和力矩计算焊核附近连接板和焊核周围的"结构应力";然后通过一组焊点S-N曲线估计焊点的疲劳寿命. 通过分析预测焊点疲劳寿命以及相应位置,发现白车身薄弱环节.
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| 关 键 词： | 疲劳寿命预测(FLP) 结构应力 S-N曲线 白车身 |
| 文章编号： | 1006-0871(2006)S1-0189-04 |
Method for Fatigue Life Prediction of Automotive Spot-Welds |
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| YE Yuanlin.Method for Fatigue Life Prediction of Automotive Spot-Welds[J].Computer Aided Engineering,2006,15(Z1):189-192. |
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| Authors: | YE Yuanlin |
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| Abstract: | An engineering calculation method of spot weld fatigue life prediction is introduced. The method applies the CWELD element to simulate the weld nugget and the shell element to simulate the sheet metal and uses the bar element cross sectional forces and moments to calculate the "structural stresses" in each spot-weld nugget and the adjacent sheets. These stresses are then used to make fatigue life predictions on the spot weld using the S-N curves method. From the analysis the fatigue lives and the locations of spot-welds can be predicted and the weak area of BIW can be found. |
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| Keywords: | fatigue life prediction (FIP) structural stress S-N curves BIW |
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