锻压技术

基于失效模式的拼焊板焊缝建模方式确定

英文标题：Determination of weld modeling method for the tailor welded blanks based on failure modes

作者：陈水生孙东继

分类号：TG386

出版年,卷(期):页码：2014,39(9):11-16

摘要：

为兼顾拼焊板仿真精度和效率，合理选择焊缝建模方式，对母材ZSTE260E的同材差厚拼焊板进行单向拉伸和极限胀形试验。采用试验和有限元法分析了3种典型应变状态下，焊缝建模方式对极限胀形试验冲头最大载荷、最大位移及失效模式的影响。结果表明，当失效发生在焊缝上时，焊缝对拼焊板成形行为有显著影响，在焊缝仿真建模时必须考虑焊缝性能。基于焊缝建模方式对拼焊板成形行为的影响，确定了拼焊板焊缝线焊缝建模的母材匹配参数范围。

Regarding the tradeoff between higher simulation accuracy and computational efficiency, the tensile experiments and the limit bulge experiments were conducted for the weld of tailor welded blanks (TWBs) with the base material ZSTE260E and dissimilar thickness in order to select the suitable modeling method. The effect was analyzed for the weld modeling method on the limit bulge experiment in conditions of the maximum load, the maximum displacement and the failure modes, using experiments and finite element method under three typical kinds of strain states. The results show that the weld has a significant impact on the forming behaviors of TWBs when the failure occurs at the weld, and the weld properties need to be considered in weld modeling. According to the effect of weld modeling method on the forming behaviors of TWBs, the matching parameters scope of base material in the weld modeling of weld for TWBs is obtained.

基金项目：

河南省教育厅科学技术研究重点项目(14A460013)；河南省科技攻关计划资助项目(142102210130)

陈水生（1978-），男，博士研究生，讲师

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