Abstract:

In order to study the 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 (500m/s, 600m/s and 800m/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 indicated 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 impact-resistance type of 3DAWC.

Key words: three-dimensional angle interlock, composite, high-velocity impact, finite element analysis