Effect of interfacial debonding on the failure behavior in a fiber-reinforced composite subjected to transverse tension
Effect of interfacial debonding on the failure behavior in a fiber-reinforced composite subjected to transverse tension
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DOI：
10.1016/j.commatsci.2009.07.011
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发表时间：
2009-11
影响因子：
3.3
通讯作者：
M. Romanowicz
中科院分区：
文献类型：
--
作者：
M. Romanowicz
本文用计算细观力学方法测定了玻璃/环氧复合材料层板在横向拉伸载荷作用下的宏观应力-应变曲线。为了计算给定应变下的应力，采用了具有六边形对称性的三相单胞的有限元模型。采用双线性粘聚力模型模拟了钢筋与基体之间的混合型脱粘。采用非均匀界面相模拟基体与纤维之间的应力传递。文中还对脱粘生长进行了详细的分析。参数研究表明，选择的值的内聚参数，以及脱粘的位置有影响的宏观响应的材料。所提出的模型模拟横向拉伸下的材料的软化行为，并预测最终失败的能力被证明。
By using computational micromechanics, macroscopic stress–strain curves for a glass/epoxy lamina subjected to transverse tension were determined in this paper. To compute stress for given strain, a finite element model of a three-phased unit cell with the hexagonal symmetry was employed. Mixed mode debonding conditions between reinforcement and matrix were modeled by a bilinear cohesive law. A stress transfer between matrix and fiber was simulated by a inhomogeneous interphase. A detailed analysis of a debonding growth was also presented. Parametrical studies showed that a choice of values for cohesive parameters as well as debonding locations do have an influence on the macroscopic response of material. An ability of the proposed model to simulate the softening behavior of the material under transverse tension and to predict final failure was demonstrated.