Impacting energy absorption device based on composite pipe cutting inward-turning crushing

Abstract

The invention relates to an impacting energy absorption device based on composite pipe cutting inward-turning crushing. The impacting energy absorption device comprises an outer sleeve, a cutter and a positioning pipe. The cutter is located inside the outer sleeve, the lower end of the cutter is connected with an inner flange of the outer sleeve, and the upper end of the cutter is connected with the positioning pipe. The positioning pipe is located inside the outer sleeve and closely connected with the inner wall of the outer sleeve, and the lower surface of the positioning pipe makes contact with the cutter. The outer sleeve, the positioning pipe and a composite pipe are provided with pin holes capable of coinciding, and the outer sleeve, the positioning pipe and the composite pipe are closely combined together through pins. Compared with the prior art, the impacting energy absorption device has the advantages that the overall structure is simple, the material utilization rate is high, and the surrounding structure is not affected while the pipe strength is enhanced.

Description

technical field [0001] The invention relates to the technical field of energy-absorbing structures, in particular to an impact energy-absorbing device based on cutting and inversion crushing of composite material pipes. Background technique [0002] The anti-collision structure of the lower part of the modern commercial aircraft fuselage and the anti-collision beam structure of vehicles mostly use metal materials. The energy generated by impact damage is usually absorbed through plastic deformation. Limited by the metal material itself, the absorbed energy and structural weight are relatively small, and the composite The material construction is lightweight and absorbs more energy. S.Heimbs proposed a plan to cut the composite material into several thin strips through the joint, so that the composite material can produce a more complex failure form to absorb energy, but the tear strip expands to the outside of the sleeve during the implementation of this plan. Expanding aro...

AI Technical Summary

Problems solved by technology

S.Heimbs proposed a plan to cut several thin strips of the composite material through the joint, so that the composite material can produce a more complex damage form to absorb energy, but the tear strip expands outward from the sleeve during the implementation of this plan. Expanding around and wrapping around the sleeve will cause great interference and impact on nearby structures, and when the carbon fiber tube is torn and broken, it will produce a lot of debris and fine fibers, which will also have an adverse impact on the surrounding environment

Images