Numerical Prediction of Permeability Tensor for Sheared Woven Fabric by Asymptotic Homogenization Theory

摘要

The permeability is a key parameter in the RTM process simulation. This paper presents a novel computational method to predict the three-dimensional permeability tensor using the asymptotic homogenization theory. The prediction is based on the microstructure of the composite materials. In this paper, the sheared woven fabric after draping or performing is studied. The non-diagonal term in the permeability tensor can be easily estimated by the proposed method. Furthermore, the microscopic flow field can be analyzed as well as the macroscopic permeability tensor. The microscopic flow field includes important information rather than the permeability tensor which is the averaged values.