An efficient multi-scale computation of the macroscopic coefficient of thermal expansion: Application to the resin transfer molding manufactured 3D woven composites

This paper presents a simple and computationally effcient multi-scale procedure to predict the macroscopic temperature dependent coeffcient of thermal expansion (CTE) of any linearly thermoelastic material from isothermal mechanical simulations only. The approach relies on Levin's demonstration that, in analytical homogenization, the e ective coeffcient of thermal expansion is related to the local coeffcient of thermal expansion and the stress concentration tensor. For demonstration purposes, this procedure was applied to a 3D woven composite material. The proposed approach was successfully validated with full thermal simulations.

Mots clés

multi-scale modeling; homogenization; coeffcient of thermal expansion; 3D woven composite