基于KSⅡ试验的焊点失效模拟研究  

Simulation of Spot Weld Failure Based on KSII Test

作　　者：李萌[1] 毛博文 王武荣[1] 韦习成[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海交通大学学报》2013年第12期1823-1827,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(51005144,50934011);上海汽车工业科技发展基金

摘　　要：基于8-Hex实体单元束焊点模型,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.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.

关 键 词：仿真 焊点失效 KSII试验 实体单元 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]