Structurally stitched NCF CFRP laminates. Part 2: Finite element unit cell based prediction of in-plane strength
Structurally stitched NCF CFRP laminates. Part 2: Finite element unit cell based prediction of in-plane strength
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DOI：
10.1016/j.compscitech.2010.11.011
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发表时间：
2011-03
影响因子：
9.1
通讯作者：
H. Hess;N. Himmel
中科院分区：
文献类型：
--
作者：
H. Hess;N. Himmel
通过对碳纤维/环氧树脂结构缝合无卷曲织物（NCF）层合板在面内拉伸、压缩和剪切载荷[1]作用下的试验研究，建立了考虑纱线直径、缝合方式和缝合方向以及载荷类型的有限元单元胞模型来估计NCF层合板的面内强度。根据这些参数，模型中考虑了未受干扰和受干扰的纤维取向导致树脂袋的区域以及纤维体积分数的局部变化。实验结果与数值结果的比较表明，结构缝合的NCF层合板在面内拉伸、压缩或剪切载荷作用下的强度预测具有较好的精度。模拟和实验观察到的总体平均偏差在8%到13%之间。
Based on experimental investigations on structurally stitched non-crimp fabric (NCF) carbon fiber/epoxy laminates under in-plane tension, compression and shear loading [1], a finite element based unit cell model was developed to estimate the in-plane strength of NCF laminates taking into consideration the yarn diameter, the stitching pattern and direction as well as the load type. Depending on these parameters, regions with undisturbed and disturbed fiber orientations leading to resin pockets as well as local changes of the fiber volume fraction are taken into account in the model. The comparison of experimental and numerical results showed that the strength of structurally stitched NCF laminates under in-plane tension, compression or shear loading can be predicted with an acceptable accuracy. The overall mean deviation between simulation and experiment observed was between 8% and 13%.