具有倾斜链结构的磁流变弹性体的磁致剪切模量模型与分析

When an oblique magnetic field is applied to magnetorheological composite elastomer filled with magnetic particles during the preparation process, one obtains an ordered tilted chain-like preconfiguration. Based on the magnetic dipole model, a three dimensional analysis model is proposed in this paper to compute the magnetic field-induced shear modulus of this kind of magnetorheological elastomers (MRE). The model not only can be degenerated to the existing single-chain and plane model, but also applied to predict and analyse the magnetic field-induced shear modulus of the MRE with the chain distribution of the different inclination angle. Results show that the changes in the magnetic field-induced properties of MRE strongly depend on the orientation angle of particle chains. In addition, the optimal tilt angle for the highest and the negative magneto-induced modulus has been found for samples. Meanwhile, the relationship between the magnetic field-induced shear modulus and the volume fraction of ferromagnetic particles is predicted.