Unified microporomechanical approach for mechanical behavior and permeability of misaligned unidirectional fiber reinforcement
Unified microporomechanical approach for mechanical behavior and permeability of misaligned unidirectional fiber reinforcement
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DOI：
10.1016/j.compscitech.2010.04.023
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发表时间：
2010-09
影响因子：
9.1
通讯作者：
T. Tran;S. Comas-Cardona;N. Abriak;C. Binetruy
中科院分区：
文献类型：
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作者：
T. Tran;S. Comas-Cardona;N. Abriak;C. Binetruy
微孔力学方法（通过均匀化方案）已经被使用并与三轴试验相结合，以验证先前论文[Tran T，Binetruy C，Comas-Cardona S，Abriak NE.纯直单向纤维材料的微孔力学行为：理论与实验。Compos Sci Technol 2009;69：199-206。理论和实验结果的比较是一致的，即毕奥系数明显低于一个密集的光纤阵列。在本文中，该结果将在纤维不是完全直的而是未对准的情况下（局部接触的单向纤维组装）得到发展。此外，在相同的理论框架内，还将估计双尺度孔隙率的纤维增强体的横向压缩模量和渗透率。本文所用的均匀化格式是自洽格式和Mori-Tanaka提出的均匀化格式。估计，并在可能的情况下，不同类型的纤维材料（碳，凯夫拉和玻璃纤维）的书目结果进行了比较，并显示出良好的协议。
The microporomechanical approach (via homogenization schemes) has been used and combined with triaxial tests to verify the Biot theory for the perfectly straight unidirectional fiber assembly in a previous paper [Tran T, Binetruy C, Comas-Cardona S, Abriak NE. Microporomechanical behaviour of perfectly straight unidirectional fiber material: theoretical and experimental. Compos Sci Technol 2009;69:199–206.]. The comparison of theoretical and experimental results is in good agreement, i.e. the Biot coefficients are clearly lower than one for densely packed fiber array. This result will be developed in this article in the case where the fibers are not perfectly straight but in misalignment (unidirectional fiber assembly in localized contact). Furthermore, within the same theoretical framework, the transverse compression modulus and the hydraulic permeability will be also estimated for the fiber reinforcement of double-scale porosity. The homogenization schemes used in this article are the self-consistent and the one proposed by Mori–Tanaka. The estimated and, when possible, bibliographical results for different types of fibrous materials (carbon, kevlar and glass fibers) are compared and show good agreement.