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Abstract

This article describes the plastic contraction phenomenon and energy absorption of aluminum tubes, under axial compression by conical entry dies. Experiments were carried out on aluminum tubes machined from commercially available tubes. All tubes had outer diameter of 30 mm and inner diameter was made such that the tubes were obtained in the thickness range of 1–5 mm. The dies were made with semiangles of 5°, 10°, 15°, and 20°. The straight portion of die had inner diameter of 28.5 mm; hence, the diametric interference of 1.5 mm was obtained at straight portion. These dies were made with steel with sufficient thickness to treat them as rigid. The numerical simulation was done for the experiments using LS-DYNA software. Based on numerical and experimental results, the force–displacement graph characteristics for different deformations modes were discussed in detail. Effects of tube thickness and its interference with die were studied. The effect of material property on energy absorption was studied. The effect of friction on overall energy was also studied. The various associated characteristics such as tube deformation at tip and stress pattern were also studied.

Keywords

Tube contraction conical entry die energy absorption plastic deformation

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References

Nia

Hamedani

. Comparative analysis of energy absorption and deformations of thin walled tubes with various section geometries. Thin Wall Struct 2010; 48(12): 946–954.

DeRuntz

Hodge

. Crushing of a tube between rigid plates. J Appl Mech 1963; 30: 391–398.

Olabi

Morris

Hashmi

MSJ

. Metallic tube type energy absorbers: a synopsis. Thin Wall Struct 2007; 45: 706–726.

. Study of the crushing of tubes by two indenters. Int J Mech Sci 1993; 35(3/4): 267–278.

Reid

Reddy

. Effect of strain hardening on the lateral compression of tubes between rigid plates. Int J Solids Struct 1978; 14: 213–225.

Reddy

Reid

. Lateral compression of tubes and tube-systems with side constraints. Int J Mech Sci 1979; 21(3): 187–199.

Alexander

. An approximate analysis of the collapse of thin cylindrical shells under axial load. Q J Mech Appl Math 1960; 13: 10–15.

Guillow

Grzebieta

. Quasi-static axial compression of thin-walled circular aluminium tubes. Int J Mech Sci 2001; 43(9): 2103–2123.

Alghamdi

AAA

. Collapsible impact energy absorbers: an overview. Thin Wall Struct 2001; 39: 189–213.

10.

Reid

. Plastic deformation mechanisms in axially compressed metal tubes used as impact energy absorbers. Int J Mech Sci 1993; 35(12): 1035–1052.

11.

Al-Hassani

STS

Johnson

Lowe

. Characteristics of inversion tube under axial loading. J Mech Eng Sci 1972; 14: 370–381.

12.

Ezra

Fay

. An assessment of energy absorbing devices for prospective use in aircraft impact situation. In: Herrmann

Perrone

(eds) Dynamic response of structures. New York: Pergamon Press, 1972, pp.225–234.

13.

Huang

. Finite element analysis of tube inward curling process by conical dies. J Mater Process Tech 2005; 170: 616–623.

14.

Alves

Almeida

BPP

Rosa

PAR

. End forming of thin-walled tubes. J Mater Process Tech 2006; 177: 183–187.

15.

Alves

Martin

PAF

. Cold expansion and reduction of thin-walled PVC tubes using a die. J Mater Process Tech 2009; 209: 4229–4236.

16.

Yang

Luo

Hua

. Energy absorption of expansion tubes using a conical–cylindrical die: experiments and numerical simulation. Int J Mech Sci 2010; 52: 716–725.

17.

Almeida

BPP

Alves

Rosa

PAR

. Expansion and reduction of thin-walled tubes using a die: experimental and theoretical investigation. Int J Mach Tool Manuf 2006; 46: 1643–1652.

18.

ASTM International. ASTM E8/E8M-09 standard test methods for tension testing of metallic materials.

19.

HyperMesh11. A product of Altair Engineering. HyperWorks, for finite element pre-processing, www.altairhyperworks.com

20.

LS-DYNA. LS-DYNA, a program for nonlinear dynamic analysis of structures in three dimension (Version 970). Livermore, CA: Livermore Software Technology Corporation, 2003.

21.

Livermore Software Technology Corporation. LS-DYNA keyword user’s manual (vol. 1, Version 960). Livermore, CA: Livermore Software Technology Corporation, 2012, pp.251–261.

22.

Livermore Software Technology Corporation. LS-PrePost—an advanced pre/post processor for LS-DYNA. Livermore, CA: Livermore Software Technology Corporation, 2007.

Experimental and numerical studies on the tube contraction using a conical–cylindrical die

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