基于Digimat中RVE模型的磁流变弹性体的磁致压缩力学性能的数值模拟

Simulation of magnetic field induced compressive mechanical properties of magnetorheological elastomers based on RVE model in Digimat

磁流变弹性体的宏观压缩力学性能受其组分材料的体积比、形态和外加磁场等因素的影响。从3方面系统的研究了磁流变弹性体在磁场和压缩条件下的静态磁致力学性能。首先运用Digimat软件中的均匀化方法和RVE研究零磁场条件下的磁流变弹性体力学性能。然后研究了磁场条件下各向同性和各向异性磁流变弹性的磁致力学性能。最后利用实验方法研究磁流变弹性体的力学性能。得到了磁场的施加使得各向同性和颗粒成链磁流变弹性体的压缩模量增大,同时颗粒成链比各向同性磁流变弹性体的磁流变效应更大的结论。

The macroscopic compressive mechanical properties of magnetorheological elastomers are affected by the volume ratio,morphology and external magnetic field of the components.In this paper,the static magnetoinduced properties of magnetorheological elastomers under magnetic field and compression conditions are systematically studied from three aspects.Firstly,the homogenization method and RVE of Digimat were used to study the mechanical properties of magnetorheological elastomers under zero magnetic field.Then,the magneto-induced mechanical properties of isotropic and anisotropic magnetorheological elastomers are studied under magnetic field.Finally,the mechanical properties of magnetorheological elastomers were studied by experimental method.The results show that the magnetic-induced compressive modulus of both the granule isotropic and the chain magnetorheological elastomers increases under magnetic field.Meanwhile,the magnetorheological effect of the magnetorheological elastomer of granule chain is greater than that of the isotropic magnetorheological elastomer.