复合材料层合板鸟撞损伤及吸能影响因素数值分析

Numerical analysis of the damage of bird impaction against composite laminates and the influence factors on absorbing energy

数值分析是进行复合材料构件抗鸟撞损伤设计工作中的重要内容.主要采用瞬态非线性有限元分析方法结合文献试验对层合板鸟撞过程进行数值分析,分析了鸟撞层合板的初始损伤情况以及某一时刻各层的应力、应变情况;对比分析了铺层顺序、层合板参数、鸟体参数的变化对层合板吸收能量的影响.分析结果对航空复合材料层合构件抗鸟撞研究具有一定的参考价值.

The numerical analysis is a very important work in the process of design on how composites resist the damage from bird impact. The paper analyzed and tested numeri-cally the initial damage, stress and strain of every layer of laminates from bird impact using instantaneous non-linear FEM. It also analyzed how the changes of ply stacking sequence, parameter of laminates and birds affect the absorbing energy of laminates. The results of this paper provide a basis for further research on composite structures resisting bird impact.