#br#
Comparative Study of Spot Weld Simulation Method between Beam and Solid

China Mechanical Engineering ›› 2012, Vol. 23 ›› Issue (19): 2388-2392.

#br# Comparative Study of Spot Weld Simulation Method between Beam and Solid

Chen Jun;Cheng Aiguo;Chen Tao;Zhao Min

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082

Online:2012-10-10 Published:2012-10-17
Supported by:

Supported by Program for Changjiang Scholars and Innovative Research Team in University（No. 531105050037）

Beam与Solid两种点焊模拟方法对比研究

陈军;成艾国;陈涛;赵敏

湖南大学汽车车身先进设计制造国家重点实验室,长沙,410082

基金资助:
教育部长江学者与创新团队发展计划资助项目(531105050037)；上海市数字化汽车车身工程重点实验室开放基金资助项目(2010-02)；湖南大学汽车车身先进设计制造国家重点实验室自主研究课题资助项目(60870002)
Supported by Program for Changjiang Scholars and Innovative Research Team in University（No. 531105050037）

Abstract

Abstract:

In the process of finite element analysis of automobile, spot modeling exerted a great influence on simulation accuracy. Authors used a single spot weld Lap-shear and dual spot weld Lap-shear model, when the position of spot weld in the grid and integral way of shell element of the welding base metal were changed, the stability of the mechanical properties of Lap-shear model was analyzed while the spot weld was simulated with Beam element or Solid element, and the conclusion drawn before was applied to validate 100% frontal crash of the vehicle. The results show while spot weld is simulated with Solid element, it is demonstrated that the stability of the mechanical properties of Lap-shear model is relatively high, and when considering welding failure, the better choice is to use Solid element to simulate the spot weld.

Key words: Lap-shear model, Beam element, Solid element, stability

摘要：

在汽车整车有限元仿真分析中,点焊的建模对仿真精度影响较大。仿真中,针对焊点在网格中的位置及焊接母材壳单元积分方式的不同,分析了采用Beam单元和Solid单元模拟焊点时Lap-shear模型所表现出的力学性能的稳定性,并将得出的结论应用到100%整车正面碰撞中进行验证。结果表明,采用Solid单元模拟焊点时,Lap-shear模型所表现出的力学性能的稳定性相对较高;在考虑点焊失效的情况下,采用Solid点焊单元来模拟焊点比较准确。

关键词: Lap-shear模型, Beam单元, Solid单元, 稳健性

CLC Number:

U461

CHEN Jun, CHENG Ai-Guo, CHEN Chao, DIAO Min. #br# Comparative Study of Spot Weld Simulation Method between Beam and Solid[J]. China Mechanical Engineering, 2012, 23(19): 2388-2392.

陈军, 成艾国, 陈涛, 赵敏. Beam与Solid两种点焊模拟方法对比研究[J]. 中国机械工程, 2012, 23(19): 2388-2392.

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