层合结构复合材料热膨胀系数的有限元计算

Finite Element Calculation on Thermal Expansion Coefficient of Laminated Composite

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 clement software ABAQUS,through the establishment of the RVE model of fiber fabric reinforced laminated composite, four geometric models of different layer structure were established. Based on the finite element computational micromechanics,the thermal expansion coefficient of RVE was predicted by sequentially coupled thermal-stress analysis. The simulation prediction was in good agreement with the experiment value ,verified the effectiveness of the prediction method,compared the influence of matrixes and fiber materials with different properties, structural layers on RVE model expansion coefficient.