Citation

Santosa S, Wierzbicki T. Int. J. Crashworthiness 1997; 2(4): 305-332.

Copyright

(Copyright © 1997, Informa - Taylor and Francis Group)

DOI

unavailable

PMID

unavailable

Abstract

Crush behaviour of empty and filled box columns undergoing torsional deformation is analyzed. Two distinct crushing states are observed in the plastic deformation, namely the initial torsional resistance and the stabilized torsional crushing mechanisms. The formulations for the crushing resistance of empty and filled columns are developed in terms of geometrical parameters and filler strength. The low density metal filling, such as aluminium foam or honeycomb, provides a stabilizing effect on the torsional crushing process. The inward fold collapse of the column wall is restricted due to the filler, and the plastic resisting mechanism is increased through the formation of outward-diagonal shear bands. Numerical simulations show that, in terms of achieving higher energy absorption to weight ratio, the aluminium foam or honeycomb filling is preferable to thickening the column wall. Moreover, the presence of adhesive improved significantly the specific energy absorption.

Language: en