The numerical simulation method of lap shear strength of clinch joint is studied to predict the lap shear strength of clinch joint. Firstly, 0.7 mm low carbon steel + 0.7 mm low carbon steel, 1 mm low carbon steel + 1 mm low carbon steel clinch joints are modeled based on the experimental results. The lap shear process of these clinch joint can simulated by finite element method. Then experiments of clinch joint' s lap shear process are carried out to validate the simulating results. Finally, with the validating model, the mesh size and the undercut of the clinch joint model are considered to find out the effect of the strength of clinch joint. It is shown that the simulating results of clinch joint's shear strength have a good agreement with the experimental results; the appropriate mesh size can optimize the simulating time when get the credibility resu the strength of the clinch joint is mainly affected by the undercut.%针对冲压连接接头拉剪强度的数值模拟方法进行研究.对0.7 mm低碳钢+0.7 mm低碳钢以及1 mm低碳钢+1mm低碳钢板冲压连接接头的剪切拉伸过程建立有限元模型,采用数值模拟的方法分析冲压连接接头的拉剪强度及失效形式.并且通过试验过程验证有限元模拟结果的可靠性.在确定有限元模型可靠的情况下,分析了冲压连接接头处的网格尺寸以及冲压连接接头的嵌入值对冲压连接接头的影响.研究结果表明:有限元模拟结果与试验结果吻合良好;合适的网格尺寸能够在优化计算时间的同时得到可靠的计算结果;冲压连接接头的拉剪强度受上板嵌入值影响.
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