颗粒增强复合材料的大变形细观力学模型  

MICROMECHANICS MODELS OF PARTICULATE FILLED ELASTOMER AT FINITE STRAIN DEFORMATION

作　　者：杨慧[1] 

机构地区：[1]上海工程技术大学航空运输学院,上海201620

出　　处：《机械强度》2016年第3期564-569,共6页Journal of Mechanical Strength

基　　金：上海工程技术大学科研启动基金项目资助(E1-0501-14-0128)资助

摘　　要：基于Eshelby等效夹杂理论和Mori-Tanaka方法,提出一个可研究颗粒增强超弹性基复合材料力学性能的大变形细观模型。该模型基于单一分子链模型建立,可分析纯橡胶材料和复合材料的力学特性,并着重研究橡胶基体与夹杂颗粒间的协同作用机制。通过与已有实验结果和分析模型对比验证了该模型的准确性。研究发现,用Mori-Tanka方法计算小变形问题与实验数据比较吻合,但对于大变形问题有较大的偏差;用网络模型来研究高弹性体变形问题具有一定的合理性,可以比较准确的解释微观组织的变形机理,并对研究颗粒与分子链间相互作用变形有一定的意义。This paper deals with a micromechanics-based model which is proposed for the finite strain deformation of filled elastomers based on generalized Eshelby ＇s tensor and Mori-Tanaka ＇s method. The present formulation leads to a clear explanation of the constraint effect of rubber-like matrix on the inclusions. Comparisons with experiments and other micromechanics models are conducted. It is observed that an improvement in predictive capability for the composite with randomly dispersed particles was achieved by the present method. Based on the latest experiment of single molecular chain,a compact network model is fatherly developed to reflect the microstructure effect on the stress-strain relations of rubbery polymer and the resulting composites.

关 键 词：聚合物基复合材料 微观结构 微观力学 计算模型 

分 类 号：TB332[一般工业技术—材料科学与工程]