Porous magnetorheological elastomer and buffer device

Abstract

The invention discloses a porous magnetorheological elastomer and a buffer device based on the same. The porous magnetorheological elastomer comprises a rubber substrate, gas somas and soft magnetic packing grains. A foaming agent is promoted to decompose and release gases under certain temperature and magnetic field actions in the crosslinking process of substrates magnetorheological elastomers by utilizing a rubber foaming technology, thus, a great number of obturated gas somas are formed in the magnetorheological elastomer; and after the solidification process of the magnetorheological elastomer is ended, the gas somas are implanted in the magnetorheological elastomer to form the porous magnetorheological elastomer. Meanwhile, the soft magnetic packing grains inside the magnetorheological elastomer are distributed in a chain-shaped structure under the action of a magnetic field so that a favorable magnetic effect is achieved. The obturated gas somas are introduced to the magnetorheological elastomer so that the rigidity and dampness changing performances of the magnetorheological elastomer under the action of the magnetic field are improved; and a compression type buffer device is designed by utilizing the porous magnetorheological elastomer so that a better buffering effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological materials and applications, in particular to a porous magnetorheological elastomer and a buffer device based on the porous magnetorheological elastomer. Background technique [0002] Magnetorheological elastomer is a new member of the family of magnetorheological materials, which has broad application prospects in noise and vibration control, stiffness controllable systems and sensitive components. Magnetorheological elastomers have both the viscous properties of magnetorheological fluids and the elastic properties of elastic solids. They are intelligent materials with variable stiffness and damping. However, traditional magnetorheological elastomers have the problems of low magnetotropic effect and limited damping adjustment range, which have also become the bottleneck of the development of magnetorheological elastomers. In addition, in recent years, researchers have applied magnetorh...

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Problems solved by technology

However, traditional magnetorheological elastomers have the problems of low magnetotropic effect and limited damping adjustment range, which have also become the bottleneck of the development of magnetorheological elastomers.

In addition, in recent years, researchers have applied magnetorheological elastomers to shear vibration isolation devices, but magnetorheological elastomers are very sensitive to shear strain, and the magnetotropic effect decreases rapidly under the action of shear strain.

And in the shear mode, there is a disadvantage of low bearing capacity, which restricts the application of this smart material in the field of vibration isolation, buffering and vibration absorption.

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