An energy absorbing device using material limit characteristics and its manufacturing method

Abstract

The invention relates to the field of energy absorption devices, in particular to an energy absorption device adopting the material limit characteristic, and a manufacturing method of the energy absorption device. The energy absorption device comprises a T-shaped head, an energy absorption tube and a bottom plate, wherein the bottom plate is fixed on a structure needing to be protected; one end of the energy absorption tube is connected with the bottom plate; the T-shaped head is inserted into the other end of the energy absorption tube, and structurally consists of an upper cylinder and a lower cylinder; the diameter of the lower cylinder is smaller than that of the upper cylinder; the upper cylinder is smoothly connected with the lower cylinder through a circular arc surface; one section, in contact with the T-shaped head, of the energy absorption tube is of a segmented structure; each segment part is tightly attached to the circular arc surface of the T-shaped head and is bent outwards. The energy absorption device has the advantages of being stable in destroy mode, good in load stability, good in energy absorption effect, simple in manufacturing process, flexible in adjustment, high in space utilization rate and the like.

Description

technical field [0001] The invention relates to the field of energy-absorbing devices, in particular to an energy-absorbing device utilizing material limit characteristics and a manufacturing method thereof. Background technique [0002] Common energy-absorbing structures include composite cylindrical tubes, metal cylindrical tubes, foamed aluminum and hat-shaped structures, etc., and these energy-absorbing structures have their own shortcomings. Composite cylindrical tube - the failure mode is complex and diverse, poor predictability, and the failure process is accompanied by debris generation; metal cylindrical tube - the load fluctuation of the plastic metal cylindrical tube is too large during the progressive crushing process, and the load of the brittle metal cylindrical tube The change is drastic, the energy absorption is not easy to predict, and there is fragmentation; foamed aluminum - the load of plastic foamed aluminum increases too rapidly in the dense compression...

AI Technical Summary

Problems solved by technology

Composite cylindrical tube - the failure mode is complex and diverse, the predictability is poor, and the failure process is accompanied by debris generation; metal cylindrical tube - the load fluctuation of the plastic metal cylindrical tube is too large during the progressive crushing process, and the load of the brittle metal cylindrical tube The change is drastic, the energy absorption is not easy to predict, and there is fragmentation; foamed aluminum - the load of plastic foamed aluminum increases too rapidly in the dense compression stage, and the brittle foamed aluminum is accompanied by debris detachment during the compression process, and the load occurs locally with the fracture of the cell body Jitter; hat-shaped structure - the load stability of single-hat and double-hat structures is not good, and the hat-shaped filling structure is difficult to process and high in cost

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