Influence of Porosity on the Response of Fibrous Composites

摘要

This paper presents a micromechanical examination of the effect of microscale porosity over three length scales of an intermetallic hybrid fiber composite. The reinforcing fiber is a multifilament tow infiltrated with a porous binder. Predictions of the elastic isotropic properties of the binder are developed using Aboudi's three-dimensional generalized method of cells (GMC), micromechanics model. The second stage of modeling uses the effective properties of the binder in a two dimensional GMC analysis of the elastic properties of the hybrid fiber. Finally, the effective properties of the hybrid fiber and the nonlinear properties of the intermetallic matrix are used to predict the elastic properties and inelastic response of the composite.