Simulation on Delamination Failure of Carbon Fiber Reinforced Epoxy Resin Composite Circular Tube under Axial Crushing

doi:10.3901/JME.2020.12.107

Abstract

Abstract: In order to simulate the compression failure modes and energy absorption characteristics of unidirectional carbon fiber reinforced composite circular tube, the axial crushing tests are carried out to obtain the compression failure modes and the load-displacement curves. The crushing simulation of single shell layer model is carried out to determine the non-experimental measurable parameters in MAT54 material model. A multilayer shell layers models are established to simulate the delamination failure based on tiebreak contact. The effects of mesh size and shell layers on the compression failure mode are studied. The accuracy of the model is verified by comparing with the experimental results. The results show that the parameters YCFAC and SOFT affect the peak load and average crushing load of the load-displacement curve. The mesh size and the number of shell layers influence the failure modes of circular tubes. The smaller the mesh size, the more obvious the delamination failure and matrix cracking are. The initial peak load decreases with the increase of shell layers, and the calculation time increases exponentially. Considering the simulation cost and prediction accuracy, the four-layer shell model can accurately predict the axial crushing performance and delamination failure of carbon fiber composites circular tube.

Key words: carbon fiber reinforced composite, crushing simulation, energy absorption characteristics, delamination failure

CLC Number:

TB332

ZHUANG Weimin, LIU Yang, LIU Xiyang. Simulation on Delamination Failure of Carbon Fiber Reinforced Epoxy Resin Composite Circular Tube under Axial Crushing[J]. Journal of Mechanical Engineering, 2020, 56(12): 107-115.

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