Constrained cracking in glass fibre-reinforced epoxy cross-ply laminates
Constrained cracking in glass fibre-reinforced epoxy cross-ply laminates
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DOI：
10.1007/bf00739291
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发表时间：
1978
影响因子：
4.5
通讯作者：
A. Parvizi;K. Garrett;J. E. Bailey
中科院分区：
文献类型：
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作者：
A. Parvizi;K. Garrett;J. E. Bailey
90°交叉铺层玻璃增强环氧树脂的试样在平行于外层中的增强方向的张力下进行测试。内层的厚度是变化的，并且在小厚度下观察到裂纹约束。在大的内层厚度的试样表现出均匀的横向裂纹，并在非常低的内层厚度，这种横向裂纹可以完全抑制之前，总试样失败。断裂韧性值测定相同体积分数的横向单向层压板。据发现，可以占观察到的开裂约束，使用理论的Aveston和凯利。
Specimens of 90° cross-ply glass-reinforced epoxy resins were tested in tension parallel to the direction of reinforcement in the outer plies. The thickness of the inner ply was varied and cracking constraint was observed at small thicknesses. At large inner-ply thicknesses the specimens showed uniform transverse cracking, and at very low inner-ply thicknesses this transverse cracking could be suppressed completely prior to total specimen failure. Fracture toughness values were determined on transverse unidirectional laminates of the same volume fraction. It was found that the cracking constraint observed can be accounted for, using the theory of Aveston and Kelly.