Transactions of Materials and Heat Treatment

Title：Influence of lap form for multi-layer steel-aluminum sheet on shear mechanical properties for riveted parts

Authors： Luo Guojian1 Sun Youping1 2 3 Li Wangzhen1 2 3 Yu Wanyuan4 Ren Ziqiang1

Unit： 1.School of Mechanical and Automotive Engineering Guangxi University of Science and Technology 2.Guangxi Earthmoving Machinery Collaborative Innovation Center Guangxi University of Science and Technology 3.Guangxi Key Laboratory of Auto Parts and Vehicle Technology Guangxi University of Science and Technology 4.School of Automotive Engineering Liuzhou Vocational and Technical College

KeyWords： steel-aluminum sheet JDA1b cast aluminum self-piercing riveting lap form mechanical properties failure modes

ClassificationCode：TG938

year,vol(issue):pagenumber：2024,49(4):131-137

Abstract：

The self-piercing riveting joint was prepared by material combination of HC340/590DP advanced high-strength steel and JDA1b cast aluminum, and the self-piercing riveting joints were tested by different lap forms to explore the relationship between its mechanical properties and lap forms. Then, the quality of joint was evaluated by the metallography of the joint profile, and the strength and failure mode of joint were explored by static mechanical tensile. Furthermore, the energy absorption characteristics of each type of joint were obtained by integrating the load-displacement curves. The test results show that the JDA1b cast aluminum with an elongation of more than 11% can be used as the bottom sheet to provide a guarantee for the effective forming of joints. The average failure load of joints with the three different lap forms are FS1(5.04 kN)<FS2(7.08 kN)<FS3(9.88 kN). The energy absorption values of joints are ES1(1.435 J)<ES3(4.226 J)<ES2(27.525 J). Taking the mechanical response such as failure load and energy absorption of joint as the application index of engineering structure, it is recommended to use the S3 combination form in structures that are obviously affected by external load or shedding force. For components obviously affected by fatigue vibration, it is recommended to use the S2 combination form with higher energy absorption value.

Funds：

广西科技基地和人才专项（桂科AD22080042）；广西重点研发计划（桂科AB23026104）

作者简介：罗国健（1996-），男，硕士研究生 E-mail：1872558980@qq.com 通信作者：孙有平(1979-)，男，博士，教授 E-mail：syptaiji@126.com

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