Direct Numerical Simulation of 3D Woven Textile Composites Subjected to Compressive Loading: A Multiscale Approach

摘要

Results for the compressive response of hybrid 3D woven textile composites (H3DWTCs)that consist of carbon, glass and kevlar fiber tows and a polymer matrix material are presented,using a combination of experiments and a multi-scale analysis of the full laboratory scale couponfor a class of H3DWTCs. The coupon model considers macro, meso and micro scale basedmodeling, where the notched gage area is explicitly modeled with fiber tows embedded in thematrix and the grip areas are homogenized at the macro scale. The meso scale fiber tows areconsidered homogenized entities of fibers and matrix, and are related to the constituents throughan analytical micromechanics model. The experimental results suggest that carbon fibercompressive strength dictates the initiation of kink banding failure in carbon tows, while glassfiber tow compressive strength dictates the maximum load attainable. These experimentalobservations are seen to be captured by the 3-scale modeling strategy developed here and hence,seems to be a computationally efficient tool for the progressive damage and failure analysis oftextile composites.