利用RSA (random sequential adsorption)方法生成了含不同体积分数和不同壁厚的空心玻璃微珠(HGMs)填充树脂(HGMs/树脂)复合材料代表体元模型,用有限元软件ANSYS计算了该材料的热膨胀性能,得到了材料热膨胀系数与HGMs体积分数和壁厚的变化关系以及温度变化产生的应力场和位移场分布情况.分别对HGMs/树脂热膨胀系数与HGMs体积分数和壁厚变化曲线进行线性拟合和指数函数拟合,分析了HGMs体积分数和壁厚对HGMs/树脂热膨胀系数的灵敏度.结果发现,HGMs体积分数与壁厚的增大都会降低HGMs/树脂的热膨胀系数；填充体积分数对材料热膨胀系数的灵敏度大于壁厚的灵敏度.
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