A smart material consisting of thin-walled hollow spheres and magnetically sensitive elastomers

Abstract

The invention provides an intelligent material composed of thin-walled hollow spheres and magnetically sensitive elastomers, which includes magnetic particles, thin-walled hollow spheres and a polymer matrix; the magnetic particles and thin-walled hollow spheres are uniformly arranged inside the polymer matrix , the magnetic particles surround the thin-walled hollow spheres; the thin-walled hollow spheres are placed in a mold with positioning holes or positioning grooves according to a certain arrangement, and the magnetized magnetic particles and aggregates are cast into the mold. The mixed liquid composed of the matrix material, or the mixed melt composed of magnetic particles and polymer matrix material is extruded into the mold, and the mold is solidified in a strong magnetic field environment to ensure that the magnetic particles in it are also in a chain shape according to the direction of the magnetic field. Arrangement; the invention is a new type of intelligent material with light weight, good mechanical properties, controllable stiffness and damping, and large energy absorption, and has very broad application prospects.

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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