Sage Journals: Discover world-class research

Abstract

The present paper deals with the collapse simulation of aluminium alloy extruded polygonal section columns subjected to oblique loads. Oblique load conditions in numerical simulations are applied by means of impacting a declined rigid wall on the tubes with no friction in this task. The explicit finite element code LS-DYNA is used to simulate the crash behaviour of polygonal section columns that are undergoing both axial and bending collapse situations. In order to validate LS-DYNA results the collapse procedure of square columns is successfully simulated and the obtained numerical results are compared with actual available experimental data. Mean crush loads and permanent displacements corresponding to load angles have been investigated, considering columns with square, hexagonal, octagonal, decagonal, and circular cross-sections. It is shown that the octagonal cross-section has better characteristics from the point of view of vehicle crashworthiness under oblique load conditions.

Keywords

oblique loads polygonal section column crashworthiness

Get full access to this article

View all access options for this article.

References

Jones

Structural impact, paperback edition, 1977 (Cambridge University Press).

Chung

T.-E.

Lee

Y.-R.

Kim

C.-S.

Kim

H.-S.

Design of aluminum space frame for crashworthiness improvement. SAE paper 960167, 1996.

Fukuo

Fujimura

Saito

Tsunoda

Takiguchi

Development of the ultra-low-fuel-consumption hybrid car-insight. JSAE Rev., 2001, 22, 95–103.

Abramowicz

Jones

Dynamic axial crushing of square tubes. Int. J. Impact Engng, 1984, 2 (2), 179–208.

Mahmood

H. F.

Paluszky

Design of thin walled column for crash energy management - their strength and mode of collapse. In Proceedings of the Fourth International Conference on Vehicle Structural Mechanics, Detroit, Michigan, November 1981, pp. 7–18.

Wierzbicki

Abramowicz

On the crushing mechanics of thin-walled structures. J. Appl. Mechanics, 1983, 50, 727–734.

Tani

Funahasi

Energy absorption by the plastic deformation of body structural members. SAE technical paper 780368, 1978.

Okubo

Akamatsu

Shirasawa

Mean crushing strength of closed-hat section members. SAE technical paper 740040, 1974.

Kecman

Bending collapse of rectangular and square section tubes. Int. J. Mech. Sci., 1983, 25 (9/10), 623–636.

10.

Wallentowitz

Adam

Predicting the crashworthiness of vehicle structures made by lightweight design materials and innovative joining methods. Int. J. Crashworthiness, 1996, 1 (2), 163–180.

11.

Langseth

Hopperstad

Static and dynamic axial crushing of square thin-walled aluminum extrusions. Int. J. Impact Engng, 1996, 18 (7/8), 949–968.

12.

Opheim

Bending of thin-walled extrusions. Doctoral Thesis, Norwegian University of Science and Technology, Trondheim, 1996.

13.

Langseth

Hopperstad

Berstad

Square aluminum tubes subjected to oblique loading. Int. J. Impact Engng, 2003, 28, 1077–1106.

14.

Langseth

Hopperstad

Berstad

Crashworthiness of aluminum extrusions: Validation of numerical simulation, effect of mass ratio and impact velocity. Int. J. Impact Engng, 1999, 22, 829–854.

15.

Hosseini Tehrani

Nikahd

Effects of ribs on S-frame crashworthiness. Proc. IMechE, Part D: J. Automobile Engineering, 2006, 220 (D12), 1679–1689.

Collapse study of thin-walled polygonal section columns subjected to oblique loads

Abstract

Abstract

Keywords

Get full access to this article

References