Crush behaviour of foam-filled thin-walled conical frusta: analytical, numerical and experimental studies

This paper is concerned with a detailed study of the crush behaviour of foam-filled conical frusta using numerical, analytical and experimental techniques. Finite element models of thin-walled frusta with and without metallic foam filler are developed to simulate their progressive collapse behaviour...

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Bibliographic Details
Published in:Acta mechanica 2016-12, Vol.227 (12), p.3391-3406
Main Authors: Meguid, S. A., Yang, F., Hou, P.
Format: Article
Language:English
Subjects:
Behavior
Classical and Continuum Physics
Control
Crush tests
Dynamical Systems
Engineering
Engineering Thermodynamics
Fillers
Finite element method
Foamed metals
Foams
Heat and Mass Transfer
Mathematical analysis
Mathematical models
Original Paper
Solid Mechanics
Theoretical and Applied Mechanics
Vibration
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Summary:This paper is concerned with a detailed study of the crush behaviour of foam-filled conical frusta using numerical, analytical and experimental techniques. Finite element models of thin-walled frusta with and without metallic foam filler are developed to simulate their progressive collapse behaviour under axial crush loads. The finite element results are compared with a kinematically admissible analytical model developed earlier by the authors as well as experimentally using crush tests. The effect of key design parameters such as taper angle, slenderness ratio, and foam filling are carefully examined and discussed. The results show that introducing a taper angle in a straight column helps to reduce the initial crippling load and increases the resistance to global buckling. Besides, the filling of the metallic foam further increases the specific energy absorption efficiency. This is due to the densification of the filler foam and the reduction of the plastic fold length. This work is intended to provide guidelines for the design of thin-walled metallic energy absorbers.
ISSN:0001-5970
1619-6937
DOI:10.1007/s00707-016-1662-x