展宽机织复合材料破片高速冲击仿真模拟研究

The failure behavior of woven composite panel under high-speed impact through numerical simulation is investigated. Macro-scale detailed finite element model for the woven composite panel is generated by using explicit finite element software, LS-DYNA^®. Micromechanical theories are used to determine the basic mechanical properties of the woven composite panel. The Chang-Chang failure criterion is adopted to predict the impact damage modes and ultimate failure of the woven composite panel. High-speed impact tests are conducted to assess the critical penetration threshold and examine the typical impact failure features of the woven composite panel, which is also used to validate the developed numerical model by comparing the simulation results with the experimental. The validated numerical model is then used to investigate the penetration process and impact failure mechanism of the composite panel under various impact velocities (0.1 ~ 0.8 km/s). The numerical results suggest that: the compression damage area in the middle layer of the woven composite panel is smaller than the surface layers; the compression damage area of the woven composite panel decreases with the increase of impact velocity; and the energy absorbed by the composite panel follows a linear relationship with the impact velocity of the projectile in the velocity range of 0.2 ~ 0.8 km/s.