Characterization of high-speed impact damage in composite fan-engine systems

研究了CFRP（碳纤维增强塑料）复合材料的高速（约声速）冲击损伤。首先进行异物冲击试验，获取高速冲击损伤数据。其次，对损伤现象进行建模和有限元分析，模拟损伤传播过程。特别研究了材料性能对损伤尺寸和射孔极限速度的影响。采用粒子法进行了损伤扩展仿真，并将仿真结果与实验结果进行了对比，验证了方法的有效性。

High-speed(around the sound velocity) impact damage in CFRP(carbon fiber reinforced plastic) laminates was characterized. First, foreign object impact tests were conducted to obtain high-speed impact damage data. Next, modeling of damage phenomena and finite element analysis were performed to simulate the damage propagation processes. Particularly, the effect of material properties on damage size and perforation limit speed was investigated numerically. In addition, damage extension simulation was conducted using a particle method and its result was compared with experiment result to confirm the validity of the method.