| 孙朝阳,黄再兴.层合板冲击损伤的PD率效应本构模型分析[J].计算力学学报,2016,33(6):840~845 |
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| 层合板冲击损伤的PD率效应本构模型分析 |
| Peridynamic rate-dependent constitutive model for impact damage of composite laminate |
| 投稿时间：2015-07-01 修订日期：2015-09-02 |
| DOI：10.7511/jslx201606006 |
| 中文关键词: 近场动力学 PD率效应本构模型 复合材料层合板 冲击速度 损伤 |
| 英文关键词:peridynamics PD rate-dependent constitutive model composite laminates impact velocity damage |
| 基金项目:国家自然科学基金（11672129）资助项目. |
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| 中文摘要: |
| 从近场动力学（简称PD）理论的PMB材料模型出发，结合Kelvin-Voigt粘弹性固体模型，建立PD率效应本构模型。采用LAMMPS软件模拟了环氧树脂板、纤维增强复合材料单向层板和多向铺层层合板受冲击的情况。通过分析各板的冲击损伤，探索纤维对板的增强作用。同时，分析了不同冲击速度下层合板上下表面的损伤程度，初步探讨了从低速碰撞到高速冲击过程中复合材料层合板的破坏机理及规律。 |
| 英文摘要: |
| A peridynamic rate-dependent constitutive equation is advanced based on the prototype microelastic brittle (PMB) model and the Kelvin-Voigt viscoelastic model.By means of the LAMMPS molecular dynamic code,we perform the simulations for the isotropic circular epoxy plate,the uni-directional composite laminate and the multi-directional composite laminate subjected to impact loading,and compare their impact resistance.Meanwhile,we analyze the damage on upper and lower surface of the multi-directional composite laminate subjected to impact loadings with various velocities.The results reveal the failure mechanism of composite laminate in the impacting process from low-velocity collision to high-velocity penetration. |
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