Experimental Study of Energy Absorption of Square Column under Multi-Indentation Loading

Document Type : Research Article

Authors

Department of Mechanical and Aerospace Engineering, Shiraz university of Technology, Shiraz, Iran

Abstract

This research deals with experimental investigation on energy absorption and deformation of thin walled square columns under multi-indentation loading. The main goal of this research is to examine the effect of number and diameter of indenters and distance between them on the energy absorption parameters. First, square aluminum specimens with specific lengths were prepared and also an adjustable fixture for applying multi-indentation loading was fabricated. Then the indentation loading were applied on the specimens during a quasi-static condition with a constant loading rate. During loadings, the specimens were located between an almost rigid platen and the adjustable indenters. The load-displacement diagrams of specimens were obtained and the energy absorption parameters were calculated. The results indicate that the amount of absorbed energy in multi-indentation process increases significantly respect to single-indentation. By increasing the distance between indenters in multi-indentation loading, the load- displacement diagram shifts upward and moves toward the twice of single-indentation diagram. Also, by increment of diameter of indenters and distance between them, the amount of absorbed energy increases 20-60% due to formation of bigger plastic hinges.

Keywords

Main Subjects

References

[1] A. Alghamdi, Collapsible impact energy absorbers: an overview, Thin-walled structures, 39(2) (2001) 189-213.
[2] S.V. Hosseini, J. Zamani, A. Darvize, M. Soleimani, An experimental and numerical analysis of mechanical and geometrical characteristics effect on crush loading of square energy absorbers under axial loading, Mechanic and Aero Space, 2(2) (2006) 1-10 (in Persian).
[3] C. Karroum, S.R. Reid, S. Li, Indentation of ring-stiffened cylinders by wedge-shaped indenters—Part 1: An experimental and finite element investigation, International journal of mechanical sciences, 49(1) (2007) 13-38.
[4] W. Johnson, A. Walton, Protection of car occupants in frontal impacts with heavy lorries: Frontal structures, International Journal of Impact Engineering, 1(2) (1983) 111-123.
[5] W. Johnson, A. Walton, An experimental investigation of the energy dissipation of a number of car bumpers under quasi-static lateral loads, International Journal of Impact Engineering, 1(3) (1983) 301-308.
[6] J.D. Reid, D.L. Sicking, Design and simulation of a sequential kinking guardrail terminal, International journal of impact engineering, 21(9) (1998) 761-772.
[7] Y. Kanae, T. Sasaki, S. Shimamura, Experimental and analytical studies on the drop-impact test with lead-shielded scale model radioactive material shipping casks, in: Structural impact and crashworthiness. Volume 2, 1984.
[8] A. Alghamdi, Protection of Saudi descent roads using metallic collapsible energy absorbers, Final Report Submitted to KACST, Riyadh, Saudi Arabia, Grant, 98(2) (2000) 74.
[9] L. Mirfendereski, M. Salimi, S. Ziaei-Rad, Parametric study and numerical analysis of empty and foam-filled thin-walled tubes under static and dynamic loadings, International Journal of Mechanical Sciences, 50(6) (2008) 1042-1057.
[10] S. Reid, Metal tubes as impact energy absorbers, in: Metal forming and impact mechanics, Elsevier, 1985, pp. 249-269.
[11] A.A. Nia, H. Badnava, K.F. Nejad, An experimental investigation on crack effect on the mechanical behavior and energy absorption of thin-walled tubes, Materials & Design, 32(6) (2011) 3594-3607.
[12] K. Johnson, The correlation of indentation experiments, Journal of the Mechanics and Physics of Solids, 18(2) (1970) 115-126.
[13] V.-W. Shim, W. Stronge, Lateral crushing of thin-walled tubes between cylindrical indenters, International journal of mechanical sciences, 28(10) (1986) 683-707.
[14] G. Lu, A study of the crushing of tubes by two indenters, International journal of mechanical sciences, 35(3-4) (1993) 267-278.
[15] T. Wierzbicki, M. Suh, Indentation of tubes under combined loading, International Journal of Mechanical Sciences, 30(3-4) (1988) 229-248.
[16] C. Kardaras, G.X. Lu, Finite element analysis of thin walled tubes under point loads subjected to large plastic deformation, in: Key engineering materials, Trans Tech Publ, 2000, pp. 733-738.
[17] D.C. Brooker, A numerical study on the lateral indentation of continuously supported tubes, Journal of Constructional Steel Research, 60(8) (2004) 1177-1192.
[18] A.-G. Olabi, E. Morris, M. Hashmi, Metallic tube type energy absorbers: a synopsis, Thin-walled structures, 45(7-8) (2007) 706-726.
[19] F. Hafeez, F. Almaskari, Experimental investigation of the scaling laws in laterally indented filament wound tubes supported with V shaped cradles, Composite Structures, 126 (2015) 265-284.
[20] E. ASTM, 8M. Standard Test Methods of Tension Testing of Metallic Materials (Metric), Annual Book of ASTM Standards, in: Am Soc Testing Mater, 1999, pp. 01.
[21] Y. Xiang, T. Yu, L. Yang, Comparative analysis of energy absorption capacity of polygonal tubes, multi-cell tubes and honeycombs by utilizing key performance indicators, Materials & Design, 89 (2016) 689-696.
Amirkabir Journal of Mechanical Engineering
Volume 51, Issue 1
March and April 2019
Pages 33-42

Files

Share

How to cite

Statistics