Numerical Analysis on Magnetic-induced Shear Modulus of Magnetorheological Elastomers Based on Multi-chain Model  

基于多链模型的磁流变弹性体剪切模量的数值分析(英文)

作　　者：朱应顺[1] 龚兴龙[1] 党辉[1] 张先舟[1] 张培强[1] 

机构地区：[1]中国科学技术大学力学和机械工程系中科院材料力学行为与设计重点实验室,合肥230027

出　　处：《Chinese Journal of Chemical Physics》2006年第2期126-130,共5页化学物理学报（英文）

摘　　要：Based on the magnetic interaction energy, using derivative of the magnetic energy density, a model is proposed to compute the magnetic-induced shear modulus of magnetorheological elastomers. Taking into account the influences of particles in the same chain and the particles in all adjacent chains, the traditional magnetic dipole model of the magnetorheological elastomers is modified. The influence of the ratio of the distance etween adjacent chains to the distance between adjacent particles in a chain on the magnetic induced shear odulus is quantitatively studied. When the ratio is large, the multi-chain model is compatible with the single chain model, but when the ratio is small, the difference of the two models is significant and can not be neglected. Making certain the size of the columns and the distance between adjacent columns, after constructing the computational model of BCT structures, the mechanical property of the magnetorheological elastomers composed of columnar structures is analyzed. Results show that, conventional point dipole model has overrated the magnetic-induced shear modulus of the magnetorheological elastomers. From the point of increasing the magnetic-induced shear modulus, when the particle volume fraction is small, the chain-like structure exhibits better result than the columnar structure, but when the particle volume fraction is large,the columnar structure will be better.

关 键 词：Magnetorheological elastomers Shear modulus Magnetic dipole model 

分 类 号：O343[理学—固体力学]