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在有限元软件ABAQUS中通过建立纤维织物增强层合结构复合材料的RVE模型,生成了4种不同铺层结构的几何模型。基于有限元计算细观力学,通过顺序耦合热应力分析预测了RVE的热膨胀系数。仿真预测值与工艺试验值吻合较好,验证了预测方法的有效性,并比较了不同性能的基体、纤维材料与结构层层数对RVE热膨胀系数的影响。
In the finite element software ABAQUS, four kinds of geometrical models of different ply structures were generated by establishing the RVE model of the fiber-reinforced composite material. Based on the finite element analysis of mesomechanics, the thermal expansion coefficient of RVE was predicted by the sequential coupled thermal stress analysis. The simulated predictions are in good agreement with the experimental values. The effectiveness of the prediction method is verified. The influence of different properties of matrix, fiber materials and structure layers on the RVE thermal expansion coefficient is also compared.