A generalized analytical model for predicting the tensile behavior of 3D orthogonal woven composites using finite deformation approach

Abstract

Over the past few decades, there have been an increasing interest in woven preforms as a reinforcement for composites. The invention of 3D Orthogonal Weaving (3DOW) technology introduced new and enhanced features to the conventional 2D woven preforms. Modeling the tensile behavior of 3DOW composites is very useful to the industry, it helps in characterizing the composite material with minimal need for coupon testing. In this study, a generalized analytical model was developed to predict the entire load–extension curve of the 3DOW preforms and composites including the non-linear region, using the finite-deformation approach. The model relies on the geometry of the structure and the tensile properties of the constituent yarn and resin components as input parameters. The model was generalized to predict the properties of any 3DOW structure, made with spun or filament yarn, jammed and non-jammed, which have any weave architecture, including hybrid composites. The model was verified experimentally for a broad range of experimental composites, including hybrid ones. The results indicated that there was a general good agreement between the experimental and theoretical curves.

Keywords:

• Generalized model
• 3D orthogonal weaving
• finite deformation