Analysis on the shear modulus of MR elastomer based on chain-like model

Magnetorheological elastomer (MRE) is a new kind of Magnetorheological material,which are mainly composed of polymer rubber and micron-sized magnetizable iron particles. Based on the magnetomechanics,the microstructure of chains consisting of polarized particles,and the interaction between particles,the shear stress distribution contributed by a single chain of polarized particles is formulated,and then the yield stress of magnetorheological elastomer is obtained under the assumption that the distribution of chains tends normally. The effects of the applied magnetic field intensity,the size of the particles,and the volume fraction of the particles on the macroscopic yield stress are analyzed. The proposed model is capable of analyzing the effects of other influencing factors on the yield criterion of MRE,which may assist the design and development of high-performance MRE.