A multiscale damage and crack opening model for the prediction of flow path in laminated composite
A multiscale damage and crack opening model for the prediction of flow path in laminated composite
复制标题
用于预测层状复合材料流路的多尺度损伤和裂纹张开模型
DOI：
10.1016/j.compscitech.2014.04.002
复制
发表时间：
2014
影响因子：
9.1
通讯作者：
M. Danis
中科院分区：
文献类型：
--
作者：
C. Bois;Jean;Jean;M. Danis
层合复合材料越来越多地用于流体储存或运输。该复合结构通常包括金属或聚合物衬里，以防止可能导致成本和质量显著增加的泄漏。因此，无衬垫解决方案的开发代表着一项有希望的改进。然而，复合材料层合板会受到损伤，在远低于强度载荷的载荷水平上会产生泄漏路径。本文采用多尺度方法，用代表裂纹密度和裂纹尖端分层长度的两个物理量来模拟损伤状态。通过对基本损伤单元的一批有限元模拟，评估了损伤和载荷对裂纹张开的影响。由此得到的铺层比例模型可以用来预测任意面内载荷作用下的复合材料层合板的流动路径。
Laminated composites are increasingly used for fluid storage or transportation. The composite structure generally includes a metallic or polymer liner in order to prevent leakage which can generate a significant increase in cost and mass. The development of a linerless solution thus represents a promising improvement. Nevertheless, composite laminates are subjected to damage which can generate leakage paths at a load level significantly lower than strength load. In this paper, a multiscale approach is used to model the damage state by two physical variables representing the crack density and the delamination length at crack tips. The effect of damage and load on crack opening is evaluated using a batch of finite element simulations on elementary damaged cells. The ply scale model resulting from this work can be used to predict the flow path in any composite laminate subject to any in-plane loading.