The response of composite structures with pre-stress subject to low velocity impact damage
The response of composite structures with pre-stress subject to low velocity impact damage
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DOI：
10.1016/j.compstruct.2004.06.015
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发表时间：
2004-10
影响因子：
6.3
通讯作者：
B. Whittingham;I. Marshall;Tom Mitrevski;Rhys Jones
中科院分区：
文献类型：
--
作者：
B. Whittingham;I. Marshall;Tom Mitrevski;Rhys Jones
研究了初始预应力对碳纤维/环氧树脂层合板低速冲击响应的影响。在冲击之前，使用专门设计的试验台对样品进行单轴或双轴加载，该试验台能够独立于每个轴进行拉伸或压缩加载。冲击试验进行了两个冲击能量的单轴和双轴拉伸，纯剪切和零预应力的情况下。实验定量了预应力对压痕深度、吸收能量和峰值冲击载荷的影响。结果表明，穿透/穿孔深度，峰值载荷和吸收的能量基本上是独立的性质和预应力的大小在低水平的冲击能量（6 J），变得更加显着在较高水平的冲击能量（10 J）。
The effect of an initial pre-stress on the response of carbon-fibre/epoxy laminated plates subjected to low velocity impact is investigated. Prior to being impacted, the samples are loaded either uniaxially or biaxially using a specially designed test rig which enables tension or compression loading, independent on each axis. Impact tests were carried out for two impact energies for uniaxial and biaxial tension, pure shear and the zero pre-stress cases. The effect of the pre-stress on the permanent indentation depth, absorbed energy and peak impact loads is experimentally quantified. The results indicate that the penetration/perforation depth, peak load and absorbed energy are essentially independent of the nature and magnitude of the pre-stress at low levels of impact energy (6 J), becoming more significant at higher levels of impact energy (10 J).