Smart material consisting of thin-walled hollow spheres and magnetosensitive elastomers

Abstract

The invention provides a smart material consisting of thin-walled hollow spheres and magnetosensitive elastomers. The material comprises magnetic particles, the thin-walled hollow spheres and a polymer matrix; the magnetic particles and thin-walled hollow spheres are evenly arranged inside the polymer matrix, and the magnetic particles encircle the thin-walled hollow spheres; the thin-walled hollow spheres are placed in a mold with a positioning circular hole or a positioning groove according to a certain arrangement form, a mixture containing magnetizable magnetic particles and a polymer matrix material is casted into the mold, or a mixed melt composed of magnetic particles and the polymer matrix material is extruded into the mold, and the mold is solidified in strong magnetic field environment to ensure that the magnetic particles therein are also arranged in a chain shape according to the direction of a magnetic field; The novel smart material with light weight, good mechanical property, controllable rigidity and damping, and large energy absorption has a very broad application prospect.

Description

technical field [0001] The invention relates to an intelligent material with adjustable stiffness and damping, in particular to an intelligent material composed of thin-walled hollow spheres and magnetically sensitive elastic bodies, belonging to the technical field of intelligent materials and structures. Background technique [0002] With the development of science and technology, the engineering field has put forward higher requirements for vibration and noise reduction and impact energy-absorbing structures. It is hoped that they will have the function of active control and adjustment, so many smart materials and structures have emerged as the times require. Among them, magnetosensitive elastomer is a kind of smart material that has attracted much attention. Its stiffness and damping can be adjusted by changing the strength of the external magnetic field, and it has the advantages of fast response, good stability, no need for sealing, and convenient use. However, magneto...

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Problems solved by technology

[0004] The object of the present invention is to provide a thin-walled hollow sphere-magnetic sensitive elastomer smart material with light weight, simple process, adjustable stiffness and damping, and good mechanical properties, which overcomes the uncontrollable shortcomings of existing vibration-absorbing and energy-absorbing materials, and at the same time Solve the problems of existing magneto-sensitive elastomer materials such as low strength, high density, and small adjustable range of stiffness, and realize adaptive vibration reduction for small energy shocks or vibrations, and adaptive energy absorption for large energy shocks

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