三维角联锁机织复合材料的冲击破坏有限元模拟分析

Modeling analysis on impact damage of 3-D angle-interlock woven composite based on finite element

为研究层层接结三维角联锁机织复合材料的抗高速冲击性能,以指导抗冲击材料的结构设计,通过有限元分析的方法,计算此材料在具有不同入射速度弹体冲击下的动态响应。通过对比各种冲击条件下弹体的速度与时间曲线、加速度与时间曲线、材料渐进破坏扩展及最终破坏形态等的结果发现:冲击过程中,弹体的速度变化可被划分成2个阶段;弹体的加速度波动情况可直接反映复合材料靶体吸收弹体动能的动态规律;此外,经纱发生波浪状屈曲的区域是该类材料的重要结构部位,应在设计抗冲击型三维角联锁机织复合材料时进行局部强化与结构优化。

In order to study high-velocity impact resistance of a 3-D angle-interlock woven composite（ 3DAWC） and guide the structural design of impact resistance materials,the dynamic mechanical responses of such composite subjected to the ballistic impact at serious striking velocities（ 500 m/s,600 m/s and 800 m/s） were calculated by finite element analysis. By comparatively analyzing the velocity-time curves and acceleration-time curves of the projectiles with different striking velocities,as well as the progressive damage evolution and ultimate damage morphologies of composite targets,it is found that the velocity degradation process of the project can be divided into 2 stages. The fluctuation in acceleration can directly indicate the dynamic absorption law of 3DAWC target on kinetic energy of projectile. In addition,the bent regions in warp yarns are key structural parts for 3DAWC. Such local regions,therefore,should be strengthened and performed structural optimization for the design of impactresistance type of 3DAWC.