混杂纤维增强材料板抗侵彻数值仿真及实验验证

本文根据实验研究，提出了混杂纤维增强材料靶板在弹道冲击条件下的数值仿真要求，利用大型通用有限元程序，根据实验中复合材料层合板的破坏模式及破坏机理分析，建立其抗侵彻仿真混合模型。本文采用该模型对靶板抗侵彻过程中的三种影响因素(三种工况)进行计算比较。三种工况包括：(1)层间结合力较强，基体材料失效破裂，导致纤维层分层破坏的模拟；(2)仅考虑层间相互接触力影响的模拟；(3)考虑热效应对纤维及基体材料性能的影响的模拟。计算结果与混杂纤维增强材料板抗破片侵彻的实验现象及实验规律，具有较好地一致性，同时，也证明高速冲击可以作为绝热过程进行考虑。本文仿真计算结果对于较好的理解复合纤维材料靶板中各组成成分对其抗弹能力的影响及优化靶板结构具有重要的工程意义。

NUMERICAL SIMULATION ON THE PENETRATION OF HYBRID FIBRE-REINFORCED COMPOSITE LAMINATES BY FRAGMENTS AND ITS EXPERIMENTAL VERIFICATION

A physical F.E model for the hybrid fiber reinforced composite laminates composed of Glass 2 /Twaron750 fiber and PC matrix under ballistic impact loading has been built up on the basis of experimental results. In this model, the deformation of target and the effect of all parts of hybrid laminates have been considered. The calculation praxis include the following three cases, viz.: (1) when the interlaminate conjoint force have been considered; (2) when the interlaminate conjoint force have not been considered, yet the interlaminate contact have been considered; (3) when the thermal effect have been considered. The numerical simulation results by this model agreed well with both the experimental performance and the experimental values, especially in case (3). It is of engineering significance to understand the role of each part of composite laminates on the ballistic resistibility, and to optimize the structure of target in engineering.