Damage to carbon fibre reinforced polymers (CFRP) in hole-clinched joints with aluminium alloy and CFRP. (15th February 2020)

• Record Type: Journal Article
• Authors: Liu, Yang; Zhuang, Weimin; Wu, Shijie
• Is Part Of: Composite structures. Volume 234(2020)
• Publication Date: 2020-02-15
• Subjects: Hole clinching -- Carbon fibre reinforced polymers -- Continuous damage model -- Ply angle -- Damage analysis; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2019.111710
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: This study aimed to investigate the damage to carbon fibre reinforced polymers (CFRP) in hole-clinched joints composed of CFRP and aluminium alloy 5754. A continuous damage model (CDM) based on the modified Hashin failure criterion was proposed to predict the mechanical behaviour and damage evolution of the CFRP, and the CDM was validated using open hole tensile tests. The effect of the CFRP hole radius on the joint quality was investigated to obtain the optimal joining conditions. Furthermore, a numerical model for the hole-clinching process was developed to understand the forming mechanism of the joint and the damage patterns in the CFRP. The CFRP damage patterns with different ply angles in the hole clinching process were evaluated using numerical simulations. The proposed CDM can predict the mechanical behaviour and complex damage modes of CFRP. An increased hole radius generally corresponds to an increased neck thickness and a decreased undercut of the joints. Hole clinching cannot effectively join CFRP with a 0° ply, and delamination is most severe in joints with a complex angle ply.