Transactions of Materials and Heat Treatment

Title：Analysis on mechanical properties of self-piercing riveted joints for carbon fiber reinforced polymer and AA6022-T4 aluminum alloy

Authors： Zhang Kai Min Junying Lin Jianping Wang Yunqing Zhu Feng Wu Yongrong

Unit： Tongji University Epress Systems (Shenzhen) Ltd. Shanghai NIO Automobile Co. Ltd.

KeyWords： lightweight CFRP aluminum alloy selfpiecing riveting composite plate

ClassificationCode：TG115.2

year,vol(issue):pagenumber：2019,44(1):150-156

Abstract：

The application of carbon fiber reinforced polymer (CFRP) and aluminum alloy is an important way to realize the lightweight of automotive body, and the self-piecing riveting (SPR) technology is a widely used joining technology for heterogeneous materials in automotive industry. For the self-piecing riveting of CFRP and AA6022-T4 aluminum alloy, the influence of stacking sequence of specimen on the performance of SPR joint was analyzed first. And it is proved that the maximum tensile load of SPR joint for the composite plate in the upper layer is 48% higher than that of the composite plate in the lower layer. Then, for the stacking sequence of the composite plate in the upper layer, the influence of rivet pressure on the joint performance was investigated, and the load-displacement curves of the joint obtained by different rivet pressures were analyzed from two aspects of joint uniaxial tensile strength and joint fracture mode. Furthermore, the influence of rivet pressure on the joint performance and its mechanism were discovered, namely, the mechanical properties of joint were affected by changing the damage degree of composite plate and the expansion of rivet on the lower plate.

Funds：

国家自然科学基金资助项目（51805375）

张凯（1987-），男，博士研究生，E-mail：zknevsnev@163.com；通讯作者：闵峻英（1986-），男，博士，教授，E-mail：junying.min@tongji.edu.cn

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