摘要
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。
RSA （random sequential adsorption） method was used to generate the representative volume element models of syntactic foams. Finite element software ANSYS was adopted to analyze the thermal expansion of syntactic foams. The relationships of thermal expansion coefficient of HGMs/resin and hollow glass microballoons （HGMs） filling ratio, coefficient of thermal expansion and HGMs wall- thickness were obtained. The two relation curves were fitted to linear function, and exponential function respectively, with the purpose of analyzing the sensitivity of the HGMs filling volume fraction and wall thickness to the coefficient of thermal expansion. The stress fields and displacement fields caused by temperature load were also obtained. The results show that both of the increase of HGMs filling volume fraction and wall thickness can reduce the coefficient of thermal expansion of HGMs/resin syntactic foams, and HGMs filling volume fraction shows the higher sensitivity than that of wall-thickness.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第3期233-239,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(11072210)
河北省自然科学基金(E2011203230)
河北省高等学校科学研究计划(2010166)
关键词
颗粒填充
复合泡沫
热膨胀系数
代表体元
灵敏度
particle reinforcement
syntactic foam
coefficient of thermal expansion
RVE
sensitivity
