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中文摘要：
基于8-Hex实体单元柬焊点模型，对部件试验中焊点的失效进行模拟．设计了一种KSII点焊试样试验装置，利用该装置分别进行KSII0°和KSII90°试验，确定焊点的失效剪切力和失效轴向力；对比分析了KSII0°试验和点焊搭接试验（Lap—shear）在测量焊点拉剪强度方面的差异；以KSII0°仿真和实验为基础，确定焊点材料属性中的弹性模量和切线模量．基于KSII试验确定的焊点失效模型，进行前纵梁的压溃实验及其仿真．结果表明，基于KSII试验的焊点失效模型有较高的模拟精度．
英文摘要：
Based on the 8-Hex spotweld model, the spotweld failure during coupon test was simulated. A kind of testing equipment was designed for KSII spotweld specimen tension. This equipment was utilized to conduct KSII0° and KSII90° experiments, which can determine the spotweld failure force. The differ- ence between KSII0° test and lap-shear test in measuring spotweld tensile shear strength was compared and discussed. Based on the simulation and test results of KSII0°, Young＇s modulus and Hardening modulus in spotweld materials properties was determined. The front rail crush test was simulated with the spotweld failure model based on the KSII test. The experiment and simulation results show that the KSII spotweld failure model has an excellent accuracy.
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