Analysis of Fiber Clustering in Composite Materials Using High-Fidelity Multiscale Micromechanics
Analysis of Fiber Clustering in Composite Materials Using High-Fidelity Multiscale Micromechanics
复制标题
使用高保真多尺度微观力学分析复合材料中的纤维簇
DOI：
10.1016/j.ijsolstr.2015.05.019
复制
发表时间：
2015
影响因子：
3.6
通讯作者：
S. Arnold
中科院分区：
文献类型：
--
作者：
B. Bednarcyk;J. Aboudi;S. Arnold
提出了一种新的多尺度细观力学方法，用于预测纤维增强复合材料在纤维团簇存在下的力学行为。所开发的方法是基于耦合的高保真广义方法的细胞理论，其中局部和全局尺度表示使用这种微机械方法的两个尺度的实现。浓度张量和有效的本构方程建立在这两个尺度上，并连接到建立所需的耦合，从而提供整个复合材料的局部领域以及全球的属性和有效的非线性响应。两个无量纲参数，结合实际的复合材料显微照片，被用来表征在复合材料中的纤维的聚类。基于预测的局部场，初始屈服和损伤包络线生成的各种聚类参数的聚合物基复合材料与碳纤维和玻璃纤维。非线性环氧树脂基体的行为也被认为是有效的非线性响应曲线的形式，与不同的纤维簇和两套非线性矩阵参数的结果。
A new multiscale micromechanical approach is developed for the prediction of the behavior of fiber reinforced composites in presence of fiber clustering. The developed method is based on a coupled two-scale implementation of the High-Fidelity Generalized Method of Cells theory, wherein both the local and global scales are represented using this micromechanical method. Concentration tensors and effective constitutive equations are established on both scales and linked to establish the required coupling, thus providing the local fields throughout the composite as well as the global properties and effective nonlinear response. Two non-dimensional parameters, in conjunction with actual composite micrographs, are used to characterize the clustering of fibers in the composite. Based on the predicted local fields, initial yield and damage envelopes are generated for various clustering parameters for a polymer matrix composite with both carbon and glass fibers. Nonlinear epoxy matrix behavior is also considered, with results in the form of effective nonlinear response curves, with varying fiber clustering and for two sets of nonlinear matrix parameters.