Inward-turning composite material tubular efficient energy absorber containing fillers

Abstract

The invention relates to an inward-turning composite material tubular efficient energy absorber containing fillers. The inward-turning composite material tubular efficient energy absorber comprises acomposite material tube, a flat pressing joint arranged at the top end of the composite material tube, an inward-turning joint arranged at the bottom end of the composite material tube, and compressible fillers such as foam and honeycomb materials filled in the composite material tube; and the composite material tube can be turned inwards under the action of the inward-turning joint, energy is absorbed in the turning process, the inward-turning composite material further absorbs energy under the impedance action of the fillers, and meanwhile part of energy is absorbed through compression of the fillers. Compared with the prior art, the inward-turning composite material tubular efficient energy absorber has the advantages that the crushing trigger mode is stable, the structure is kept complete in the crushing process, and efficient energy absorption is achieved.

Description

technical field [0001] The invention relates to the technical field of aircraft energy-absorbing structures, in particular to an inward-turning composite material tube-type high-efficiency energy absorber containing fillers. Background technique [0002] The anti-collision structure of the lower part of the aircraft fuselage, the helicopter floor, the vehicle anti-collision beam structure, the aircraft landing gear, the buffer seat and other structures or equipment will be affected by impact loads, and energy-absorbing devices can be used to protect equipment or personnel from greater impacts , and the process of composite material crushing can absorb a lot of energy, and the composite material is relatively light, so it has the characteristics of high energy absorption ratio, which is suitable for energy-absorbing devices, but the existing energy-absorbing devices of composite materials cannot be used as structural components at the same time. component used. [0003] Chin...

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Problems solved by technology

[0002] The anti-collision structure of the lower part of the aircraft fuselage, the helicopter floor, the vehicle anti-collision beam structure, the aircraft landing gear, the buffer seat and other structures or equipment will be affected by impact loads, and energy-absorbing devices can be used to protect equipment or personnel from greater impacts , and the process of composite material crushing can absorb a lot of energy, and the composite material is relatively light, so it has the characteristics of high energy absorption ratio, which is suitable for energy-absorbing devices, but the existing energy-absorbing devices of composite materials cannot be used as structural components at the same time. Component use

[0003] Chinese patent CN105905056A discloses an impact energy-absorbing device based on composite material pipe cutting and inversion crushing, including an outer sleeve, a cutter and a positioning tube, the cutter is located inside the outer sleeve, and the lower end is connected to the inner flange of the outer sleeve , the upper end is connected with the positioning tube; the positioning tube is located inside the outer sleeve and is closely connected with its inner wall, and its lower surface is in contact with the cutter; the outer sleeve, the positioning tube and the composite material tube are respectively provided with corresponding pin holes, three The latter are tightly combined by pins, but in this patent, the interior of the composite material tube is empty, and can only rely on the inversion of the composite material tube to absorb energy

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