Impact and compression after impact experimental study of a composite laminate with a cork thermal shield
Impact and compression after impact experimental study of a composite laminate with a cork thermal shield
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DOI：
10.1016/j.compscitech.2007.03.032
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发表时间：
2007-12-01
影响因子：
9.1
通讯作者：
Barrau, Jean-Jacques
中科院分区：
文献类型：
--
作者：
Petit, Sandrine;Bouvet, Christophe;Barrau, Jean-Jacques
本文的目的是对覆盖有用于发射器整流罩的软木隔热罩 (TS) 的复合材料层压板进行冲击和冲击后压缩 (CAI) 测试进行实验研究。为了研究其对冲击损伤的影响，对带有和不带有 TS 的复合材料层压板进行了落锤冲击试验。结果表明，TS 是一种良好的冲击机械保护装置，也是一种良好的冲击显示材料。然而，在有或没有TS的冲击试验中，得到了完全不同的损伤形貌，特别是在高冲击能量下，有TS的分层区域更大。随后，进行了 CAI 测试，以评估 TS 对残余强度的影响。对于相同的冲击能量，TS 似乎增加了残余强度，但同时，在观察到分层之前，它呈现出残余强度的下降。事实上，在 TS 的冲击测试中，与未屏蔽板材的冲击相反，在分层损坏之前出现了看不见的纤维断裂。 (C) 2007 Elsevier Ltd. 保留所有权利。
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 delarninated 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 delarnination damage contrary to the impacts on the unshielded sheets. (C) 2007 Elsevier Ltd. All rights reserved.