Failure Mechanism and Material Selection Method of CFRP/Steel Rivet-Bonding Joints

Abstract

To reveal the influence of material selection on joint properties in the joint design between carbon fiber reinforced polymer (CFRP) and steels, experiments of uniaxial tension and normal tension were performed on the bonded, riveted, and rivet-bonding joints, which were made of CFRP laminates and DC05, HC260Y, DP590, DP780, DP1180, and PHS1500 steel sheets. The failure modes and tensile strength of these joints were analyzed. The thickness ratio and bearing coefficient ratio of the CFRP parts and adjacent steel parts were summarized. The results show that the failure mode of the CFRP/steel joint depends on the mechanical properties of the material of the weaker side. During joint design, the strength and stiffness of the CFRP parts and adjacent parts should be as similar as possible. The thickness ratio of the CFRP parts and adjacent steel parts is recommended to be between 1.37 and 1.91, and the load bearing coefficient ratio is recommended to be between 0.9 and 1.52.

Keywords

• carbon fiber reinforced plymer (cfrp) laminate/steel
• joining strength
• failure mechanism
• material selection