Transactions of Materials and Heat Treatment

Title：Study of simplified finite element modeling technique for mechanical clinching joints

Authors： Zhou Luyao Lv Jie Lu Shanbin Ye Hui

Unit： Jilin University

KeyWords： mechanical clinching joints simplified model SPR2 model failure

ClassificationCode：TG335

year,vol(issue):pagenumber：2014,39(5):126-131

Abstract：

Mechanical clinching joint is widely used in connecting dissimilar materials, whose failure behavior is critical to whole vehicle crashworthiness. The study on modeling of mechanical clinching joints of aluminum alloy and steel was carried out. Beam elements, solid elements and constrained element (SPR2 model) were used as simplified mechanical clinching joint model to simulate quasi-static cross-tension and lap-shear tests. According to simulation results, SPR2 model shows a lower force value in cross-tension, while corresponds to test result well in all. Solid element and SPR2 model can simulate ductile failure mode instead of beam element in lap-shear. Considering complex modeling of solid element, SPR2 model could be used as ideal simplified mechanical clinching joint model. Further study of SPR2 model was carried out to simulate mechanical clinching joint in dynamic loading tests. SPR2 model could predict failure onset in dynamic cross-tension test as well as in quasi-static, in addition, dynamic simulation has a better result contrasting to quasi-static in lap-shear test.

Funds：

国家自然科学基金资助项目（51105166）

周璐瑶（1988-），女，硕士研究生陆善彬（1978-），男，博士，副教授

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