A novel efficient energy absorber with free inversion of a metal foam-filled circular tube

doi:10.1007/s10483-024-3068-9

Abstract

Abstract:

In this paper, a novel efficient energy absorber with free inversion of a metal foam-filled circular tube (MFFCT) is designed, and the axial compressive behavior of the MFFCT under free inversion is studied analytically and numerically. The theoretical analysis reveals that the energy is mainly dissipated through the radial bending of the metal circular tube, the circumferential expansion of the metal circular tube, and the metal filled-foam compression. The principle of energy conservation is used to derive the theoretical formula for the minimum compressive force of the MFFCT over free inversion under axial loading. Furthermore, the free inversion deformation characteristics of the MFFCT are analyzed numerically. The theoretical steady values are found to be in good agreement with the results of the finite element (FE) analysis. The effects of the average diameter of the metal tube, the wall thickness of the metal tube, and the filled-foam strength on the free inversion deformation of the MFFCT are considered. It is observed that in the steady deformation stage, the load-carrying and energy-absorbing capacities of the MFFCT increase with the increase in the average diameter of the metal tube, the wall thickness of the metal tube, or the filled-foam strength. The specific energy absorption (SEA) of free inversion of the MFFCT is significantly higher than that of the metal tube alone.

Key words: metal foam-filled circular tube (MFFCT), free inversion, load-carrying capacity, energy absorption

2010 MSC Number:

70K20

Jianxun ZHANG, Jinwen BAI. A novel efficient energy absorber with free inversion of a metal foam-filled circular tube. Applied Mathematics and Mechanics (English Edition), 2024, 45(1): 1-14.

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Figures/Tables 12

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