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Home > Library > Yarn Compaction and Migration in Elastic Property Preiction of Woven Composites Yarn Compaction and Migration in Elastic Property Preiction of Woven Composites Christopher Pastore
and Matthew W. Dunn Ania Saeys
Abstract: A model of the elastic properties of 3D woven composites is presented based on the method of master subcells. This technique allows mechanical analysis of woven materials for which the unit cell is no longer the fundamental size. The yarns are defined using four distinct cross-sectional shapes. These primitive geometric elements are used to create master subcells, with shape parameters defined by the weave construction after composite formation. The shapes account for yarn consolidation during molding, specifically yarn compaction and the corresponding migration of picks (y- direction yarns) due to weaver placement. Elastic properties are predicted for the overall assembly of subcells using a stiffness/compliance blending method. Predicted elastic properties are compared to experimental values and other existing codes for 2D and 3D woven composites.
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