The axial compression failure behavior of unidirectional carbon fiber-reinforced polymer composites(UD-CFRP)was investigated through experimental and simulation approaches.A two-dimensional finite element model containing initial fiber misalignment defects was constructed using the finite element software ABAQUS.The model incorporated the tension-compression asymmetry of the fiber and matrix as well as interface failure criteria;A systematic study was conducted on the effects of various parameters,including fiber,matrix,and interface properties,initial fiber misalignment,and fiber diameter,on the compressive strength of UD-CFRP.The results indicate that the axial compressive strength of the composite is primarily determined by the combined effects of initial fiber misalignment,matrix,and interface shear strength.The compressive strength increases with decreasing initial fiber misalignment and increasing matrix and interface shear strength.Additionally,combined with the asymmetric failure of fiber under tension and compression,this paper also studied the kink band angle of UD-CFRP after compression failure,and the simulation results were in good agreement with experimental findings.This work provides a comprehensive prediction of the axial compressive failure of UD-CFRP,offering valuable insights for the optimized design of advanced composite materials.
关键词
碳纤维复合材料/初始位错/轴向压缩/扭折带角度
Key words
carbon fiber composites/axial compression/finite element simulation/kink band angle
维普
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