Investigation of damage behavior and gas permeability of CFRP laminates under cyclic loadings for cryogenic propellant tank application

为评价碳纤维增强塑料(CFRP)在航天运载火箭低温燃料箱中的适用性，对循环载荷作用下碳纤维增强塑料(CFRP)的损伤行为和累积损伤泄漏进行了试验研究。阐明了微裂纹的形成和聚集行为及其与燃油泄漏的关系。结果表明，CFRP层合板在达到特定荷载水平时，即使出现一定程度的损伤，也不会出现渗漏现象。

Damage behavior and fuel leakage through the accumulated damages in carbon fiber-reinforced plastics (CFRP) under cyclic loadings were experimentally investigated to evaluate the applicability of CFRP to the cryogenic fuel tanks of space launch vehicles. Formation and accumulation behavior of microcracks and its relation to the fuel leakage were clarified. It was shown that CFRP laminates exhibit no leakage up to the specific load level, even when some damages are induced.