Energy dissipation theory performance of different layup patterns CFRP/aluminium alloy hat-shaped hybrid beams under three-point bending conditions

• Published in: Thin-walled structures Vol. 187; p. 110695
• Main Authors: Chen, Guang, Liu, Hao, Zhang, Junyuan, Sun, Xiuxiu, Liu, Xiaoang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2023
• Subjects: Bending theoretical model; Crashworthiness; Layup patterns; Woven CFRP/ aluminium alloy hat-shaped hybrid beam; Layup patterns; Woven CFRP/ aluminium alloy hat-shaped hybrid beam; Bending theoretical model; Crashworthiness
• ISSN: 0263-8231; 1879-3223
• DOI: 10.1016/j.tws.2023.110695

This study investigates the bending failure behaviour of CFRP-reinforced aluminium alloy hat-shaped hybrid beams under three-point bending conditions. Firstly, three-point-bending experiments are conducted for four kinds of hybrid beams with different layup directions of CFRP. It is found that the layup direction has a more significant impact on the maximum loads. The load carrying capacity of the hybrid beam tends to stabilise around a certain load after decreasing from the maximum value of load. Subsequently, FE models of hybrid beams with inner, external and concurrent reinforced patterns are established to analysis the effect of locations of reinforced structure on the bending characteristics. It is found that the effect of reinforced structure location is influenced by the relative relationship between the thicknesses of aluminium alloy and the CFRP parts. Finally, a theoretical model of hybrid beams under three-point bending condition is proposed to predict the bending characteristics. •Three-point bending experiments are conducted on aluminium alloy hat-shaped beams with CFRP internal reinforcement.•FE models of hat-shaped hybrid beams are established and verified by experimental results.•The influence of CFRP different reinforced positions on the three-point bending of the hybrid hat-shaped beam is discussed.•Theoretical analysis is conducted on hat-shaped beams with CFRP reinforcement under three-point bending condition.