Transactions of Materials and Heat Treatment

Title：Research and simulation prediction on crack propagation behavior for cast aluminum self-piercing riveting joints

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ClassificationCode：TG938

year,vol(issue):pagenumber：2023,48(9):113-118

Abstract：

In order to study the crack propagation behavior of cast aluminum in self-piercing riveting process, for a self-piercing riveting joint composed of 5754 aluminum plate and Aural2 cast aluminum, the location of the crack in joint profile and the morphology of crack were approximately restored by interrupted experiments. Then, the crack propagation mechanism of cast aluminum material inside the joint during the self-piercing riveting process was discussed, and the simulation and analysis was conducted to predict the geometric morphology and crack. The results show that there are two main locations where the cracks of cast aluminum self-piercing riveting joints occur, one is located on the side where the bottom surface of the self-piercing riveting joint is in contact with the mold, and the cracks occur when the rivets just contact the lower plate, and increase as the rivets are pressed in. The other is on the cast aluminum material of the lower plate where the rivet legs interlock with the upper and lower plates, and the cracks occur during the interlocking process and continue to grow as the rivets are pressed down. The riveting simulation model based on GISSMO damage failure is established, the morphology and contour of the simulation results are consistent with the geometric morphology of the test section profile, and the unit damage is consistent with the joint crack, which can accurately predict the geometric morphology and crack location of the joint profile.

Funds：

国家自然科学基金青年基金资助项目（52205377）；苏州市基础研究基金资助项目（SJC2022031）

作者简介：胡晓雅（1997-），女，硕士 E-mail：huxy@jitriamrd.com 通信作者：黄理（1989-），男，博士，研究员 E-mail： hli@jitriamrd.com

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