In-plane shear investigation of biaxial carbon non-crimp fabrics with experimental tests and finite element modeling
In-plane shear investigation of biaxial carbon non-crimp fabrics with experimental tests and finite element modeling
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DOI：
10.1016/j.matdes.2014.07.007
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发表时间：
2014-11-01
影响因子：
8.4
通讯作者：
Duan, Yuexin
中科院分区：
文献类型：
--
作者：
Li, Long;Zhao, Yan;Duan, Yuexin
面内剪切是成形复杂形状织物的基本变形机制之一。本文通过画框和斜向拉伸试验，研究了无卷曲织物（包括以T300碳纤维为基料的链式或经编链式组织的无卷曲织物）的面内剪切性能。结果表明，缝合线的应变状态取决于加载方向，影响NCF的剪切行为。此外，通过将剪切力归一化来比较这两个测试的结果。观察到这两种剪切力测试的归一化结果在缝合剪切方向上彼此一致，而在其他方向上的偏差归因于不同的应变机制，这是测试中样品的夹紧方式的结果。最后，建立了细观有限元模型，模拟了所选的T300链式针迹NCF的画框和斜拉试验。通过与实验结果的比较，验证了模型的有效性。尽管还需要进一步改进，但该模型为预测NCF的剪切行为提供了良好的基础。(C)2014爱思唯尔有限公司版权所有。
In-plane shear is one of the basic deformation mechanisms in forming fabrics on complicated shapes. In this paper, the in-plane shear behavior of non-crimp fabrics (NCFs), including NCFs based on T300 carbon fibers with chain or tricot-chain stitches, was characterized by picture frame and bias extension tests. It was found that the stitching yarns' strained condition depending on loading direction influences the shear behavior of NCFs. Further, the results of these two tests were compared by normalizing the shear force. It was observed that the normalized results of these two tests for shear force are consistent with each other in the direction of shear of the stitching, while deviations in other directions are attributed to the different strain mechanisms, as a result of the clamping way of the sample in the test. Finally, a mesoscopic finite element (FE) model was established to simulate the picture frame and bias extension tests for the selected T300 NCF with chain stitches. The model's validity was checked by comparing the simulated results with the experimental ones. Although some improvements are still needed, the model provides encouraging results and good foundations to predict the shear behavior for NCFs' forming. (C) 2014 Elsevier Ltd. All rights reserved.