Classical Laminate Theory Models for Woven Fabric Composites
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Abstract
Improved classical laminate theory (CLT) models are developed for plain weave, 5-, and 8-harness satin weave composites. These models retain the simplicity of the fiber undulation model and the bridging model developed by Chou and Ishikawa but do not have the assumptions made to simplify the analysis. Closed-form expressions are derived for the CLT matrices for the woven fabric composites. These expressions are then used to predict moduli, Poisson's ratios, and the coefficients of thermal expansion (CTE) using the properties of the constituents. The results from the present CLT model are compared to the results from the fabric analysis method, three-dimensional (3D) finite element mosaic models, and other CLT models. The present model results for moduli and Poisson's ratio are, in general, in good agreement with those of other models and the very limited experimental results available in the literature. However, the comparisons for the thermal coefficients of expansion are not satisfactory. The models presented in this paper can be used to predict and rank the performance of woven fabric composites starting from the properties of the constituents.
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