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

研究了碳纤维增强塑料（CFRP）层合板的高速（声速附近）冲击损伤特性。首先，进行了异物冲击试验，以获得高速冲击损伤数据。其次，对损伤现象进行建模和有限元分析，以模拟损伤扩展过程。特别地，数值研究了材料性能对损伤尺寸和穿孔极限速度的影响。采用质点法进行了损伤扩展模拟，并将模拟结果与试验结果进行了对比，验证了该方法的有效性。

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.