• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (2): 197-208.doi: 10.3901/JME.2024.02.197

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Development of Carbon Fiber Reinforced Plastic Failure Models Considering Different Stiffness Degradation Modes

YU Haiyan, HE Hongwei, XING Ping   

  1. School of Automotive Studies, Tongji University, Shanghai 201804
  • Received:2023-02-08 Revised:2023-07-11 Online:2024-01-20 Published:2024-04-09

Abstract: Two common failure criteria and three stiffness degradation criteria are compared and analyzed to improve the numerical simulation accuracy of carbon fiber composites (CFRP). The improved Hashin failure criterion is combined with Tan stiffness degradation criterion, Zinoviev stiffness degradation criterion and Tserpes stiffness degradation criterion, respectively, and three failure models including CFRP-2HT, CFRP-3HT and CFRP-3HZ are proposed. Subroutines are developed based on Abaqus software. The function and accuracy of the subroutines are verified by the experiments of uniaxial tension and three-point bending. The results show that the accuracy of the three failure models in predicting the uniaxial tensile strength of CFRP laminates with holes is 80%, 89% and 93%, respectively. The simulated failure modes are consistent with the experimental results. The three failure models have their own advantages in stiffness degradation mode, whether they have the ability to predict delamination failure, calculation accuracy and calculation efficiency. Among which, the CFRP-3HT model has the highest precision while the CFRP-2HT model has the highest efficiency.

Key words: CFRP, failure model, stiffness degradation, numerical simulation

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