Safety evaluation approach for woven CMCs in gas-turbine environment

本文对二维平面编织陶瓷基复合材料（CMC）的高速冲击损伤机理进行了研究，以评价其对异物损伤（FOD）的可靠性。详细观察了损伤模式，明确了FOD机制，发现热载荷超过1000℃的试样明显脆化。我们还开发了一种基于颗粒法的断裂模拟方法，该方法可以分析大变形和碎片碎片。采用颗粒模拟的方法研究了脆性材料的FOD机理。

This study investigates mechanism of the high-speed impact damage of 2-dimensional plain-woven ceramics-matrix-composites (CMC) in order to evaluate the reliability of the woven CMC for the foreign object damage (FOD). The damage patterns were observed in detail, and we clarified the FOD mechanism and found that the specimens with thermal load over 1000°C were significantly embrittled. We also developed a fracture simulation using a particle method, which could analyze the large deformation and the spall fragment. The FOD mechanism of a brittle material was then investigated by the particle simulation method.