The Effect of Pre-stress on Impact Response of Concave and Convex Composite Laminates☆
The Effect of Pre-stress on Impact Response of Concave and Convex Composite Laminates☆
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DOI：
10.1016/j.proeng.2014.11.133
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
H. Saghafi;T. Brugo;G. Minak;A. Zucchelli
中科院分区：
文献类型：
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作者：
H. Saghafi;T. Brugo;G. Minak;A. Zucchelli
弯曲复合材料层压板用于许多应用，而文献中的大多数研究都研究了平面层压板。因此，本文考虑曲率类型（凸或凹）和预紧力对弯曲层合板冲击响应的影响。为此，设计了特定的夹具和样本。冲击测试是在四种不同的冲击能量下进行的，样本仅固定在其直边上。结果表明，预压对凹层板损伤区域的影响小于凸层板。为了考虑不同情况下的损伤机制，还提供了一些光学图片。
Curved composite laminates are used in many applications while in the majority of the studies present in literature, flat laminates are investigated. Therefore in this paper, the influence of the curvature type (convex or concave) and preloading on impact response of curved laminates is considered. For this aim, a specific fixture and specimen were designed. The impact tests were performed at four different impact energies with the specimens fixed only in their straight sides. The results show that the effect of preloading on damaged area of concave laminates is lower than for convex ones. For considering the damage mechanism in different situations some optical pictures are also presented.