Citation

Xie S, Yang W, Li H, Wang N. Int. J. Crashworthiness 2017; 22(5): 503-517.

Copyright

(Copyright © 2017, Informa - Taylor and Francis Group)

DOI

10.1080/13588265.2017.1281081

PMID

unavailable

Abstract

To study the crashworthiness of single- and multi-cell, square structures under axial loads, the response surface models of these structures were established separately by using the polynomial response surface method (PRSM). The models describe the response surfaces of specific energy absorption (SEA), peak crushing force Fmax and mean crushing force Favg under the variation of the side-length a, wall thickness t and number of cells N in the structure. The results showed that for the square thin-walled structures with the same N, the SEA basically increases with wall thickness t and decreases with side-length a; Fmax increases with t and a, while Favg increases with t but remained unchanged with a. Besides, under the same dimensional parameters (identical a and t), the larger the value of N, the larger the values of SEA, Fmax and Favg. When other parameters are the same, with the progress of the crushing distance in a collision, structures with large side-length a, wall thickness t and number of cells N are subjected to large crushing forces and therefore the kinetic energy generated in the collision, and absorbed by these structures, is large; however, for parameters t and N, the crushing force and absorption energy change only slightly with a.

Language: en

Keywords

crashworthiness; axial impact; impact characteristics; Multi-cell structure; polynomial response surface method