Hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method

Abstract

The invention discloses a hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method. The absorbing material has a multifunctional laminated structure from the outside to the inside comprising a first dielectric layer, an absorbed layer, a second dielectric layer and a reflecting layer, wherein the first dielectric layer and the second dielectric layer are both composed of a glass fiber reinforced resin matrix composite material; the absorbed layer is composed of a continuous silicon carbide fiber reinforced resin matrix composite material; and the reflecting layer is composed of a carbon fiber reinforced resin matrix composite material. The preparation method of the absorbing material comprises the following steps of: firstly, each kind of fiber that satisfies each functional layer is selected; secondly, with the resin as the matrix, according to the laminated order and thickness of each functional layer, the absorbing material provided by the invention is prepared by the resin matrix composite material molding technology. The absorbing material provided by the invention has advantages of simple structure, good parameter tolerance, excellent wave absorbing function and low material cost, and furthermore is easy to mold.

Description

technical field [0001] The invention mainly relates to the field of structural wave-absorbing materials, in particular to a wave-absorbing material with a hybrid reinforced fiber resin-based sandwich structure and a preparation method thereof. Background technique [0002] At present, more mature absorbing material structures include Salisbury screen, Dallenbach screen, Jaumman absorber, multi-layer matching structure, etc. Among them, the Salisbury screen absorber has a narrow absorption frequency band; the Dallenbach absorber is limited by the dispersion effect of the electromagnetic parameters of the current material, and it is difficult to achieve broadband absorption; the Jaumann absorber has a simple design and a wide absorption frequency band, but its main defect is the large thickness of the material; multi-layer Matching absorbing materials have a wide absorption frequency band, but the design is difficult, and it is difficult to prepare materials with different die...

AI Technical Summary

Problems solved by technology

Among them, the Salisbury screen absorber has a narrow absorption frequency band; the Dallenbach absorber is limited by the dispersion effect of the electromagnetic parameters of the current material, and it is difficult to achieve broadband absorption; the Jaumann absorber has a simple design and a wide absorption frequency band, but its main defect is the large thickness of the material; multi-layer Matching absorbing materials has a wide absorption frequency band, but the design is difficult, and it is difficult to prepare materials with different dielectric properties

It can be seen that there are certain deficiencies in the existing absorbing materials.

In addition, from the current research status of structural absorbing materials, the more commonly used method is to add radar absorbers to composite materials to achieve their absorbing properties. The addition of absorbers will lead to adverse effects such as deterioration of mechanical properties of composite materials and increase in density. , and the stability of the material's absorbing performance is difficult to guarantee

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