A novel intelligent material composed of a porous magnetorheological elastomer and magnetorheological fluid

Abstract

The invention provides a novel intelligent material composed of a porous magnetorheological elastomer and magnetorheological fluid, which comprises a non-magnetic polymer matrix, magnetic particles inthe magnetorheological elastomer, bubble pores, channels, non-magnetic liquid and magnetic particles in the non-magnetic liquid. The magnetic particles in the magnetorheological elastomer and the bubble pores are randomly or regularly distributed in the non-magnetic polymer matrix, the multiple bubble pores are connected through the channels, the non-magnetic fluid is located in the bubble poresand the channels, and magnetic particles in non-magnetic fluid are distributed in the interior of the non-magnetic fluid. Randomly distributed bubble pores are produced by physical or chemical foamingmethods, and chain-like regularly distributed bubble pores are formed by mold forming or augmentation manufacturing (3D). The intelligent material manufactured by the invention has good vibration damping and energy absorption performance, wide adjustment range of stiffness and damping, good controllability, strong designability, stable performance and settlement resistance, and has very broad application prospect.

Description

technical field [0001] The invention relates to an intelligent material with adjustable stiffness and damping, in particular to a novel intelligent material composed of a porous magnetorheological elastomer and a magnetorheological fluid, which belongs to the technical field of intelligent materials and structures. Background technique [0002] With the development of science and technology, the demand for smart materials in the engineering field is becoming more and more extensive. Smart materials such as magnetorheological materials, shape memory materials, piezoelectric materials, smart optical fibers, and self-assembly materials are developing rapidly. Among them, the magnetorheological materials mainly include magnetorheological fluid materials (Magnetorheological Fluid, MRF) and magnetorheological elastomer materials (Magnetorheological Elastomers, MRE), MRF materials are liquid materials, and MRE materials are solid materials. However, both materials have some problem...

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Problems solved by technology

However, both materials have some problems that affect their application in the field of engineering

Magneto-rheological fluid materials have problems such as easy sedimentation, easy leakage, strict sealing, and high cost, especially the problem of particle sedimentation and performance degradation of magnetorheological fluids during long-term use, which has become a bottleneck problem that is difficult to solve

Magnetorheological fluid materials have problems such as low strength, high density, small adjustable range of stiffness and damping, and poor impact resistance.

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