Evaluation of interfacial properties in glass fibre-epoxy resin composites — reconsideration of an embedded single filament shear-strength test
Evaluation of interfacial properties in glass fibre-epoxy resin composites — reconsideration of an embedded single filament shear-strength test
复制标题
玻璃纤维-环氧树脂复合材料界面性能的评估——嵌入式单丝剪切强度测试的重新考虑
DOI：
10.1007/bf00612403
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发表时间：
1991
影响因子：
4.5
通讯作者：
E. Nishio
中科院分区：
文献类型：
--
作者：
N. Ikuta;Z. Maekawa;H. Hamada;M. Ichihashi;E. Nishio
采用单丝剪切强度试验研究了增强界面对玻璃纤维-环氧树脂复合材料单丝断裂的影响。界面效应的评价不仅通过临界纤维长度，而且通过对复合材料施加拉伸载荷观察到的嵌入单丝的断裂过程。在不同的拉伸应力下测得的平均碎片长度随应力的增加而减小，并最终达到与临界碎片长度相关的值。硅烷处理的界面增强影响断裂过程，而不是临界纤维长度。考察了纤维直径、纤维在复合材料成型过程中的张力以及复合材料力学性能的分散性等因素对复合材料力学性能的影响。提出了一种有用的方法来排除这种分散：对半长嵌入长丝处理的试样进行本试验。本方法使我们确认，增强界面上的临界纤维长度没有影响，而它确实促进了断裂的进展。
An embedded single-filament shear-strength test was employed to explore the effect of the reinforced interface on the fracture of single filaments in glass fibre-epoxy resin composites. The interfacial effect was evaluated not only by critical fibre length but also by the fracture process of an embedded single filament observed by applying tensile load to the composites. The mean fragment length, measured at different tensile stresses, decreased with an increase in stress and finally reached a value correlated with critical fragment length. Interfacial reinforcement by silane treatment affects the fracture process rather than the critical fibre length. The behaviour was examined in several factors, such as filament diameter, the tension of filament on the moulding of composites, and the scatter of the composites in mechanical properties. A useful method was proposed to exclude such scatter: specimens treated on a half-length of embedded filament were subjected to this test. The present method leads us to confirm that the reinforced interface has no effect on the critical fibre length, while it does promote the progress of the fracture.