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Impact and compression after impact experimental study of a composite laminate with a cork thermal shield

机译:带有软木隔热层的复合材料层压板的冲击试验后的冲击和压缩

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摘要

The aim of this paper is to present an experimental study of impact and compression after impact (CAI) tests performed on composite laminate covered with a cork thermal shield (TS) intended for launchers fairing. Drop weight impact tests have been performed on composite laminate sheets with and without TS in order to study its effect on the impact damage. The results show the TS is a good mechanical protection towards impact as well as a good impact revealing material. Nevertheless, totally different damage morphology is obtained during the impact test with or without TS, and in particular at high impact energy, the delaminated area is larger with TS. Afterwards, CAI tests have been performed in order to evaluate the TS effect on the residual strength. The TS appears to increase the residual strength for a same impact energy, but at the same time, it presents a decrease in residual strength before observing delamination. In fact, during the impact tests with TS, invisible fibres’ breakages appear before delamination damage contrary to the impacts on the unshielded sheets.
机译:本文的目的是提供对用于发射器整流罩的软木隔热层(TS)覆盖的复合层压板进行冲击和压缩后冲击(CAI)测试的实验研究。为了研究其对冲击损伤的影响,已经对具有和不具有TS的复合层压板进行了落锤冲击试验。结果表明,TS是一种很好的抗冲击机械保护材料,同时也是一种很好的抗冲击材料。然而,在有或没有TS的冲击试验过程中,会获得完全不同的损伤形态,特别是在高冲击能量下,TS产生的分层面积更大。之后,进行了CAI测试,以评估TS对残余强度的影响。在相同的冲击能量下,TS似乎增加了残余强度,但同时,在观察到分层之前,残余强度降低了。实际上,在使用TS进行的冲击测试中,与对未屏蔽的板材的冲击相反,在分层损坏之前会出现看不见的纤维断裂。

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