复合材料蜂窝夹芯板低速冲击损伤研究

通过三维动力学有限元建立了复合材料蜂窝夹芯板在低速冲击作用下的渐进损伤分析模型。该模型中将蜂窝夹芯等效为均匀的正交各项异性材料。采用基于应变的Hashin三维失效准则和Yeh分层失效准则对面板损伤进行判断。使用部分刚度折减对损伤材料性能进行退化。利用用户子程序将损伤判据和刚度折减方案引入到ABAQUS软件中。模拟了复合材料蜂窝夹芯板低速冲击损伤渐进过程,并与试验结果进行验证。证明了该方法的合理性,最后讨论了各种参数对冲击响应和冲击损伤的影响。

STUDIES ON LOW-VELOCITY IMPACT DAMAGE OF COMPOSITE HONEYCOMB SANDWICH PANEL

A 3D dynamic finite element model is proposed to predict the progressive damage of composites honeycomb core sandwich due to low impact.The core of this model was equivalent to a uniform orthogonal anisotropic materials.This model consists of Hashin damage criterion and Yeh failure criterion for face-plate,and deg-radate the material property which is damaged.Combined with the user-defined material constitutive program of Abaqus,the failure criterion and degra dation of material property are simulated.The dynamic response and dam-age propagation of comp osites honeycomb core sandwich due to low impact were simulated with this method.The numerical results is compared with the experiment results,it prove that the method was reasonable.The effects of the parameters on the dynamic response and damage evolution of composites honeycomb core sandwich are discussed in this paper.