Buffering energy absorption structure capable of being stably deformed based on shape memory alloy

Abstract

The invention provides a buffering energy absorption structure capable of being stably deformed based on a shape memory alloy, relates to the technical field of energy absorption, and aims to solve the technical problems that in the deformation process of an existing energy absorption structure, a local deformation zone and structural collapse are likely to occur, thorough uniform steady-state deformation cannot be achieved, and consequently damage resistance is low, and deformation is uncontrollable. The buffering energy absorption structure capable of being stably deformed based on the shape memory alloy comprises a plurality of unit cell parts, wherein each unit cell part is provided with at least one hole; the plurality of unit cell parts are mutually connected to form a porous structure; and the unit cell parts are made of nickel-titanium memory alloy or iron-based memory alloy. The energy absorption structure can achieve uniform steady-state deformation after being loaded, formation of a local deformation zone is restrained, structural collapse is avoided, and damage resistance, robustness and controllability of the energy absorption structure are improved.

Description

technical field [0001] The invention relates to the technical field of energy absorption, in particular to a stable deformable buffer energy-absorbing structure based on a shape memory alloy. Background technique [0002] Commonly used energy-absorbing materials such as foamed aluminum and honeycomb sandwich panels can rely on local collapse during large deformations to undergo severe plastic deformation to absorb a large amount of energy, thereby protecting the target object, and are widely used in military arms, aerospace, automotive engineering, etc. field. [0003] The current energy-absorbing structure usually includes a shell, which can be filled with buffer materials. When buffering and absorbing energy, the structure collapses under the large deformation of the shell itself, and severe plastic deformation occurs to absorb energy. In this process, the generated stress-strain curve will have strong strength fluctuations, and the energy-absorbing structure will also ha...

AI Technical Summary

Problems solved by technology

In this process, the generated stress-strain curve will have strong strength fluctuations, and the energy-absorbing structure will also have obvious local deformation bands, resulting in uneven and unstable overall deformation, large local strains and other parts. non-equilibrium state without deformation

[0004] However, the current energy-absorbing structures cannot achieve complete uniform steady-state deformation, resulting in low damage resistance, making the energy-absorbing deformation process extremely uncontrollable and unpredictable

Images