Study on the Design and Fatigue Properties of the Riveted Joint of CFRP/Aluminum Alloy

摘要

In this paper, three types of CFRP / aluminum alloy riveted joints, single -rivet joint, double-rivet joint and three-rivet joint, were prepared by riveting technology. Using ABAQUS software, the influence of rivet forming process and quantity on the tensile property of CFRP / aluminum alloy riveted joint was simulated and analyzed, and the stress distribution of CFRP / aluminum alloy riveted joint in the process of riveting and stretching was obtained. The position of the maximum stress is always around the rivet hole on the aluminum alloy plate closest to the clamped end. Through the static tensile test of the CFRP / aluminum alloy riveted joints, the maximum bearing capacity of the single-rivet joint was 5.95 kN, that of the double-rivet joint was 11.18 kN, and that of the three-rivet joint is 15.57 kN. The fatigue limit of three-rivet joint was 27.35 MPa. The reason of fatigue failure of joint was that aluminum alloy cracked on the surface of rivet holes and propagates to instability.