Influence of interface waviness on delamination characteristics and correlation of through-thickness tensile failure with mode I energy release rates in carbon fibre textile composites
Influence of interface waviness on delamination characteristics and correlation of through-thickness tensile failure with mode I energy release rates in carbon fibre textile composites
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DOI：
10.1016/j.matdes.2013.03.075
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发表时间：
2013-09-01
影响因子：
8.4
通讯作者：
Zahneisen, F.
中科院分区：
文献类型：
--
作者：
Hufenbach, W.;Hornig, A.;Zahneisen, F.
通过穿透厚度(TT)拉伸试验、双悬臂梁(DCB)试验和端部缺口弯曲(ENF)试验，研究了层状3D纺织增强碳纤维/环氧复合材料的分层引发和扩展行为。应用和比较了确定模式I和模式II应变能释放率的不同标准化方法。结果清楚地表明了分层传播特性与传播方向的依赖关系，这种依赖关系由纺织结构和相应的界面波纹度引起。利用原位和非原位计算机断层扫描(CT)研究了TT拉伸破坏特征。在考虑高斯和威布尔方法的情况下，对统计分布进行了研究。根据TT测试得出的模式I能量释放率与传统上基于DCB测试确定的值之间存在相关性。(C)2013爱思唯尔有限公司。保留所有权利。
The delamination initiation and propagation behaviour of layer-wise 3D-textile reinforced carbon fibre/epoxy composites is investigated by through-thickness (TT) tension tests as well as Double Cantilever Beam (DCB) and End-Notch Flexure (ENF) experiments. Different standardised approaches to determine modes I and II strain energy release rates are applied and compared. The results clearly indicate a dependency of the delamination propagation characteristics on the propagation direction, induced by the textile architecture and the according interface waviness. In situ and ex situ computed tomography (CT) is used to investigate TT tensile failure characteristics. The statistical distribution has been investigated considering Gauss and Weibull approaches. A correlation is drawn between the mode I energy release rate derived from the TT testing and traditionally determined values based on DCB testing. (C) 2013 Elsevier Ltd. All rights reserved.