Numerical analysis of dynamic response: Fatigue behaviour analysis of Al alloy-CFRP riveted single-shear lap joints. (May 2023)

• Record Type: Journal Article
• Authors: Wang, He; Li, Hechang; Fan, Jianfei; Liu, Xuetong; Peng, Jinfang; He, Liping; Liu, Jianhua; Zhu, Minhao
• Is Part Of: International journal of fatigue. Volume 170(2023)
• Publication Date: 2023-05
• Subjects: Hysteretic loops -- Failure analysis -- Service behaviour -- Contact state -- Dissipated energy; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2023.107515
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: An innovative method is used to analyze the F–D curves, and cyclic relative displacement, tangential stiffness and dissipated energy are obtained. The F–D curves are subdivided into many shapes, and the fatigue service state corresponding to each shape is given. Through the analysis of the characteristics of the F–D curves, the evolution of the service and contact states are obtained. According to the damage morphology and the analysis of dissipated energy, the heat accumulation phenomenon of the contact interface is deduced. Abstract: Fatigue tests were carried out on Al alloy-carbon fibre reinforced plastic (CFRP) riveted single-shear lap joints. Through the signal processing of dynamic response, the relationship between the evolution of displacement, stiffness, dissipated energy and different failure behaviours is studied, and the service state evolution and fatigue failure process are revealed. Results show that higher load amplitudes lead to changes in the interface slip state, which increases the dissipated power. The weak point of the joint is changed from the aluminium alloy lap plate to the CFRP lap plate, which is finally reflected in the change of failure mode.