摘要
针对玻璃微珠/环氧树脂构成的胶结型颗粒复合材料提出了刚架-弹簧-阻尼模型。考虑到环氧树脂基体的阻尼特性,通过动态热机械分析,得到常温低频下环氧树脂的损耗因子,并应用于刚架-弹簧-阻尼模型。采用有限单元分析方法进行数值仿真分析,得到了玻璃微珠/环氧树脂胶结型复合材料损耗因子随玻璃微珠粒径增大的变化规律。结果表明:随着玻璃微珠粒径的增大,颗粒复合材料的刚架-弹簧-阻尼模型单元计算的损耗因子会逐渐增大,且切向损耗因子要比轴向的大;对整体材料而言,刚架-弹簧-阻尼有限元模型计算的损耗因子也会逐渐增大,其中,按照平面正四边形网格模型计算得到的损耗因子要大于平面正六边形网格模型,即颗粒复合材料的孔隙率越大,材料的损耗因子越大。仿真分析结果与实际材料的阻尼变化规律相符,这种模型是可靠的。
For glass micro balloon/epoxy resin cement particle composite,the rigid frame-spring-damper model was put forward.Considering the damping properties of epoxy matrix,the loss factor was gotten under normal temperature and low frequency by the dynamic mechanical analysis,and used for this model.A rule of loss factor for glass micro balloon/epoxy resin cement composite changed along with the increase of radius of glass micro balloon could be obtained by numerical emulation analysis using finite element analysis method.The results show that the loss factor of particle composite caculated by the rigid frame-spring-damper model increases alone with the radius increase of glass micro balloon.In addition,the shear loss factor is higher than that of axial.For the integral material,the loss factor caculated by the rigid frame-spring-damper model is gradually increasing too.The loss factor caculated by the grid model arranged by plane quadrangle is higher than that of flat hexagonal.It means that the greater the porosity of particle composite,the higher the loss factor.The simulated analysis result is consistent with actual damper laws and it suggests that the model is reasonable.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2016年第8期1710-1717,共8页
Acta Materiae Compositae Sinica
基金
国家级大学生创新训练计划(201410216019)
河北省高等学校科学技术研究重点项目(ZH2012011)
河北省高校科技研究项目(QN2015083)
燕山大学青年教师自主研究计划课题计划(13LGB022)
