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Experimental study on the impact resistance of 2D plain-woven C/SiC composite

机译：二维C / SiC平纹复合材料抗冲击性能的实验研究

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摘要

As a typical ceramic-matrix composite, the C/SiC composite has been widely applied in the Thermal Protective Structure (TPS) of spacecraft, which will inevitably suffer the external impact in service. In this work, the impact resistance of 2D plain-woven C/SiC composite and 2A12 Aluminum alloy plates have been studied. The damage mechanisms under impact load are investigated by measuring the free surface velocity, recording the debris clouds and metering the damage areas of the target plates. Experimental results indicate that the damage of C/SiC composite is just confined in a local area around the impact point, and the critical penetrating energy of 3 mm C/SiC plate is assessed to be 2.66 J. In addition, we found fiber fracture and matrix powdering are the two major energy conversion forms. All these results can provide useful reference to obtain the dynamic response of C/SiC composite and to further design heat-resistant performance of the damaged TPS.
机译：作为一种典型的陶瓷基复合材料，C / SiC复合材料已广泛应用于航天器的热保护结构（TPS）中，不可避免地会在使用中遭受外部冲击。在这项工作中，研究了二维平纹C / SiC复合材料和2A12铝合金板的耐冲击性。通过测量自由表面速度，记录碎屑云并计量目标板的损坏区域，研究了冲击载荷下的损坏机理。实验结果表明，C / SiC复合材料的损伤仅局限在冲击点附近，并且3 mm C / SiC板的临界穿透能估计为2.66J。此外，我们发现纤维断裂和基质粉末是两种主要的能量转化形式。所有这些结果可为获得C / SiC复合材料的动态响应以及进一步设计受损TPS的耐热性能提供有用的参考。

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