Investigation on the energy absorption mechanism and high-efficiency modeling method of carbon fiber reinforced composite structures

doi:10.19936/j.cnki.2096-8000.20250828.004

Abstract

Abstract: Failure mechanisms of carbon fiber reinforced polymer (CFRP) are complex, and fine-scale simulations are costly with low optimization design efficiency. To improve the simulation and optimization design efficiency of energy-absorbing components of carbon fiber composite materials, CFRP thin-walled square tubes were prepared and axial compressive crushing tests were conducted. A multi-layered and refined finite element model of the axial crushing of CFRP thin-walled square tubes was established, and the experimental and simulated failure modes and energy-absorption mechanisms were analyzed. A high-fidelity and high-efficiency equivalent modeling method was proposed. The experimental results showed that the energy-absorption mechanism of the progressive crushing failure mode of the CFRP thin-walled square tube is complex, mainly including fiber fracture, delamination, and frictional dissipation. The simulation results showed that the refined finite element model can accurately modelling the progressive crushing failure behavior and energy dissipation of the CFRP thin-walled square tube. Plastic deformation and damage are one of the main factors of energy dissipation. Based on the progressive crushing failure mode, the proposed modeling method can accurately predict the energy absorption response of the CFRP thin-walled square tube. The relatively fine modeling method has increased computational efficiency by 97%.

Key words: CFRP, thin-walled tube, energy absorption, progressive crushing, FEM

CLC Number:

TB332

WANG Kai, LUO Junjie, YAO Ruyang, PANG Tong, JIA Xiaohang, YU Lei. Investigation on the energy absorption mechanism and high-efficiency modeling method of carbon fiber reinforced composite structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(8): 24-32.

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