Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2023 , Vol. 57 >Issue 2: 201 - 212

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.352

Materials Science and Engineering

Off-Axis Tensile Test and Numerical Simulation of Unidirectional Thermoplastic Composite Laminates

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  • a. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    b. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2021-09-14

  Revised date: 2021-10-27

  Accepted date: 2021-11-05

  Online published: 2022-11-25

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Abstract

As a high-performance thermoplastic composite material, AS4/PEEK has been widely used in aerospace, military, automotive, and other fields. After conducting the off-axial tensile test of unidirectional AS4/PEEK laminates with different angles, the relevant stress-strain curves and tensile strengths, as well as fracture plane angles are obtained. In simulation, a 3D elastic-plastic model where the parameters are determined by trust-region reflective algorithm is used to describe the nonlinear mechanical behavior of AS4/PEEK laminates. In combination with the LaRC05 criterion and the crack zone theory, a user material subroutine VUMAT based on Abaqus is developed and applied to the numerical simulation of off-axis tensile test. The numerical results show that the 3D elastic-plastic damage constitutive model can accurately simulate the plastic effect of AS4/PEEK laminates and the tensile strength predicted by the numerical method agrees well with those from the test. The proposed 3D elastic-plastic damage model provides an accurate and effective method for the comprehensive analysis of plastic deformation and damage of thermoplastic composites.

Key words： AS4/PEEK; off-axial tension; plastic model; LaRC05; crack band theory

Cite this article

ZHANG Jian, CHEN Xiuhua, CHEN Yong, FANG Yin . Off-Axis Tensile Test and Numerical Simulation of Unidirectional Thermoplastic Composite Laminates[J]. Journal of Shanghai Jiaotong University, 2023 , 57(2) : 201 -212 . DOI: 10.16183/j.cnki.jsjtu.2021.352

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