Magnetic Field Control Method for Deformable Magnetorheological Elastomer Granular Structures

Abstract

The invention discloses a magnetic field control method of a magnetorheological elastic particle structure adaptable to deformation in the technical field of intelligent materials. The present invention is based on the deformation of the magnetorheological elastomer in the working state. When preparing the magnetorheological elastomer, various factors affecting the spatial distribution of the magnetic field and the effect of the rotating magnetic field on the direction of the particle chain are comprehensively considered, and an orthogonal magnetic field combination is adopted. And control the ratio of its magnetic field intensity, design the shape of the pole piece and its relative arrangement orientation, combine the mold and the magnetorheological elastomer into a magnetic circuit and control the orientation of the magnetorheological elastomer, the distribution and direction of the magnetic force line disturbed by the magnetic field interference block, The orthogonal rotating magnetic field deflects the particle chain and other design ideas, and the design of the solidifying magnetic field makes the shape of the particle structure formed in the magnetorheological elastomer pre-simulate the deformed state of the linear particle chain obtained in the original preparation method. The magnetorheological elastomer prepared by the method of the invention can improve the performance of the magnetorheological elastomer and expand its application range.

Description

technical field [0001] The invention relates to the technical field of intelligent materials, in particular to a magnetic field control method for a magnetorheological elastomer particle structure adaptable to deformation. Background technique [0002] Magnetorheological elastomers are a type of polymer-based composite material formed by uniformly mixing uncrosslinked polymers and soft magnetic microparticles, and crosslinking and curing polymers in a magnetic field environment. The high molecular polymer is called the matrix material, and the soft magnetic microparticles are called the filling material or magnetic particles. During the curing process, the magnetic particles are magnetized under the action of an external magnetic field and arranged in an orderly manner along the direction of the magnetic field, forming a particle chain structure and being fixed. The preparation process of magnetorheological elastomer mainly includes polymer coating of magnetic particles, mi...

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Problems solved by technology

Current research is devoted to improving the field-induced elastic modulus or the relative change rate of elastic modulus of magnetorheological elastomers, but because these indicators cannot fully meet the actual work requirements, magnetorheological elastomers have not yet entered large-scale applications

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