Volume 39, Number 1, February 2021
|Page(s)||37 - 45|
|Published online||09 April 2021|
A progressive damage model of composite laminates under low-velocity impact
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
In this paper, a progressive damage model for studying the dynamic mechanical response and damage development of composite laminates under low-velocity impact was established. The model applied the Hashin and Hou failure criteria to predict the initiation of intra-laminar damage (fiber and matrix damage); a linear degradation scheme combined with the equivalent displacement method was adopted to simulate the damage development; a cohesive zone model with the bilinear traction-separation relationship was used to predict delamination. A user material subroutine VUMAT was coded, and the simulation analysis of carbon fiber reinforcement composite laminates subjected to 25 J impact was performed via commercial software ABAQUS. The predicted impact force-time curve, impact force-displacement curve, and damage distribution contours among the layers were in a good agreement with the experimental, which verified the proposed model. According to the simulation results, the fiber damage and matrix damage were analyzed, and the expansion of delamination was discussed.
Key words: composite / low-velocity impact / numerical simulation / failure criterion / progressive damage
关键字 : 复合材料 / 低速冲击 / 数值仿真 / 失效准则 / 渐进损伤
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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