Abstract This paper presents a simple and computationally efficient multi-scale procedure to predict the macroscopic temperature dependent coefficient 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 effective coefficient of thermal expansion is related to the local coefficient 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.

中文翻译：

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宏观热膨胀系数的有效多尺度计算：应用于树脂传递成型制造的 3D 编织复合材料

摘要 本文提出了一种简单且计算效率高的多尺度程序，仅通过等温机械模拟来预测任何线性热弹性材料的宏观温度相关热膨胀系数 (CTE)。该方法依赖于 Levin 的证明，即在分析均质化中，有效热膨胀系数与局部热膨胀系数和应力集中张量有关。出于演示目的，此过程应用于 3D 编织复合材料。所提出的方法已通过完整的热模拟成功验证。