Inter-fibre failure of through-thickness reinforced laminates in combined transverse compression and shear load
Inter-fibre failure of through-thickness reinforced laminates in combined transverse compression and shear load
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DOI：
10.1016/j.compscitech.2018.06.011
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发表时间：
2018-09-08
影响因子：
9.1
通讯作者：
Yasaee, Mehdi
中科院分区：
文献类型：
--
作者：
Cui, Hao;Melro, Antonio R.;Yasaee, Mehdi
关于全厚度增强复合材料层压板层间性能的改进已有广泛的研究报道；尽管其在工业应用中也受到关注，但目前对其面内性能的了解相对有限。研究了全厚度增强（Z 钉扎）对单向层压板压缩时纤维间失效的影响。无销钉和 Z 销钉层压板均在四个不同的离轴角度进行测试，代表横向压缩和面内剪切应力的不同组合。研究发现，Z 形钉扎层压板的刚度在所有离轴角度下均显着下降。在以剪切为主的失效模式中，失效应变和强度有所降低，而在以压缩为主的失效模式中，由于 Z 销的存在而得到改善。对失效面的角度进行了进一步研究，并与分析失效模型进行了比较。
Extensive studies have been reported on the improvement of through-thickness reinforcement to inter-laminar performance of composite laminates; current understanding on the in-plane performance is relatively limited, although it is also concerned in industrial application. The influence of through-thickness reinforcement (Z-pinning) on the inter-fibre failure in compression of unidirectional laminates was investigated. Both unpinned and Z-pinned laminates were tested at four different off-axis angles, representing different combinations of transverse compression and in-plane shear stress. It was found that the stiffness of Z-pinned laminates decreased significantly in all off-axis angles. The failure strain and strength were reduced in shear dominated failure modes, while improved in the compression dominated failure modes by the presence of the Z-pins. A further investigation on the angle of failure plane was carried out and a comparison with analytical failure models is presented.