柱状和层状结构磁流变弹性体剪切模量的数值计算

从颗粒间的磁相互作用能出发,计算了磁流变弹性体的磁致剪切模量.考虑了链内颗粒和相邻链中颗粒的影响,修正了磁流变弹性体的磁偶极子模型.构建了体心立方结构和简单立方结构计算模型,分别考虑了柱和层状聚集结构的大小以及其间距,对含柱状结构和层状结构的磁流变弹性体的力学性能进行了计算.计算结果表明,单层模型的磁流变弹性体磁致剪切模量比单链模型的预报值高约48%.在提高磁流变弹性体的磁致剪切模量方面,层状结构优于柱状结构.

Numerical calculation on shear modulus of magnetorheological elastomers with columnar or layered structures

Based on the magnetic interaction energy,a model was 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 was modified. Making certain the size of the columns and the layers, the distance between adjacent aggregates, after constructing the computational model of body-centered tetragonal and simple cubic structures, the mechanical properties of the magnetorheologieal elastomers composed of columnar and layered structures were analyzed. Results show that,the predicted magnetic-induced shear modulus of the single-layer model is 48% higher than the conventional single-chain model. From the point of increasing the magnetic-induced shear modulus,the layered structures exhibit better result than the columnar structures.