| 复合材料层板低速冲击损伤有限元模拟 |
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| 引用本文： | 关志东,郦正能,寇长河,章怡宁,杨旭.复合材料层板低速冲击损伤有限元模拟[J].北京航空航天大学学报,1999,25(1):37-40. |
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| 作者姓名： | 关志东 郦正能 寇长河 章怡宁 杨旭 |
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| 作者单位： | 1. 北京航空航天大学,飞行器设计与应用力学系
2. 航空工业总公司,沈阳飞机设计研究所 |
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| 摘 要： | 利用三维动态有限元模拟计算复合材料层板的低速冲击损伤的过程，采用了基体开裂判据和分层扩展判据，分类考虑不同的损伤形式，通过修正损伤铺层材料的常数来模拟层板损伤所造成的局部刚度下降对冲击过程的影响，讨论了接触定律在冲击损伤问题中的适用性，并结合实验结果给出适于严重冲击损伤层板的卸载定理，模拟计算结果得到的低速冲击后各界面的分层损伤面积与实验结果吻合较好。
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| 关 键 词： | 复合材料 冲击 损伤 有限元法 |
| 修稿时间： | : 1997-06- |
Dynamic Simulation for Composite Laminates Damage Process due to Low Velocity Impact |
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| Guan Zhidong,Li Zhengneng,Kou Changhe,Zhang Yining,Yang Xu.Dynamic Simulation for Composite Laminates Damage Process due to Low Velocity Impact[J].Journal of Beijing University of Aeronautics and Astronautics,1999,25(1):37-40. |
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| Authors: | Guan Zhidong Li Zhengneng Kou Changhe Zhang Yining Yang Xu |
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| Abstract: | A transient dynamic three dimensional 20 point finite element analysis was presented for the simulation of the damage process of composite laminates due to low velocity impact.Two damage criterion were adopted here to computer different impact damage modes.They were damage initiation criterion for matrix cracking and delamination propagation criterion for the laminate interfaces. The influence of local stiffness degression resulted from damage on impact process was simulated through modifying the material constants of damaged layers. The contact laws were discussed, and a new general unloading law for low velocity impacted plates was developed.The delamination area of each interface was calculated. The results of the analysis were compared with the existing test data, and a good agreement was found. |
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| Keywords: | composite materials shocks injuries finite element methods |
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