Optimization and Parametric Study of the Cap Geometry on Collapse Properties of Energy Absorbers under Quasistatic Loading

Document Type: Original Article

Authors

1 Mechanical Engineering Department, Bu-Ali Sina University, Hamedan, Iran.

2 Aeronautical Engineering Department, Shahid Sattari University, Tehran, Iran.

10.22084/jrstan.2019.18577.1089

Abstract

In the present research, the influence of cap geometry on the collapse of thin-walled aluminum-made energy absorbers with various section geometries was investigated. For this purpose, a total of 35 different absorbers were subjected to axial quasi-static loading. In this respect, five different section types and seven different cap configurations were considered for the absorbers and their caps, respectively. The analyses were performed in both experimental and numerical methods. The numerical simulations were conducted using LSDYNA Software and experimental tests were performed to verify the numerical investigations. Good agreement was obtained between the experimental data and numerical results. The results indicated that, in all cases, the application of the cap enhanced the crush force efficiency while lowering maximum force at collapse. In the final stage of the research, optimal absorbers for the cases with open-ended and close-ended caps were proposed using Minitab Software based on the response surface methodology.

Keywords


[1] W. Abramowicz, The effective crushing distance in axially compressed thin-walled metal columns, Int. J. Impact Eng., 1(3) (1983) 309-317.
[2] W. Abramowicz, N. Jones, Dynamic axial crushing of circular tubes, Int. J. Impact Eng., 2(3) (1984) 263-281.
[3] T. Wierzbicki, W. Abramowicz, On the crushing mechanics of thin-walled structures, J. Appl. Mech., 50(4a) (1983) 727-734.
[4] M. Güden, H. Kavi, Quasi-static axial compression behavior of constraint hexagonal and squarepacked empty and aluminum foam-filled aluminum multi-tubes, Thin Walled Struct., 44(7) (2006) 739-750.
[5] A.G. Olabi, E. Morris, M.S.J. Hashmi, M.D. Gilchrist, Optimised design of nested circular tube energy absorbers under lateral impact loading, Int. J. Mech. Sci., 50(1) (2008) 104-116.
[6] M. Avalle, G. Chiandussi, Optimisation of a vehicle energy absorbing steel component with experimental validation, Int. J. Impact Eng., 34(4) (2007) 843-858.
[7] X.W. Zhang, Q.D. Tian, T.X. Yu, Axial crushing of circular tubes with buckling initiators, Thin Walled Struct., 47(6-7) (2009) 788-797.
[8] E. Acar, M.A. Guler, B. Gerçeker, M.E. Cerit, B. Bayram, Multi-objective crashworthiness optimization of tapered thin-walled tubes with axisymmetric indentations, Thin Walled Struct., 49(1) (2011) 94-105.
[9] M. Shariati, H.R. Allahbakhsh, Numerical and experimental investigations on the buckling of steel semi-spherical shells under various loadings, Thin Walled Struct., 48(8) (2010) 620-628.
[10] A. Alavi Nia, J. Haddad Hamedani, Comparative analysis of energy absorption and deformations of thin walled tubes with various section geometries, Thin Walled Struct., 48(12) (2010) 946-954.
[11] A. Ghamarian, M.A. Farsi, Experimental and numerical analysis of collapse behavior of combined Thin walled structures under axial loading, Aerosp. Res. Inst., 8 (2012) 99-109.
[12] A. Ghamarian, M. Tahaye Abadi, Axial crushing analysis of end-capped circular tube, Thin Walled Struct., 49(6) (2011) 743-752.
[13] V. Jandaghi Shahi, J. Marzbanrad, Analytical and experimental studies on quasi-static axial crush behavior of thin-walled tailor-made aluminum tubes, Thin Walled Struct., 60 (2012) 24-37.
[14] J. Song, Numerical simulation on windowed tubes subjected to oblique impact loading and a new method for the design of obliquely loaded tubes, Int. J. Impact Eng., 54 (2013) 192-205.
[15] G. Sun, F. Xu, G. Li, Q. Li, Crashing analysis and multiobjective optimization for thin-walled structures with functionally graded thickness, Int. J. Impact Eng., 64 (2014) 62-74.
[16] S. Sharifi, M. Shakeri, H.E. Fakhari, M. Bodaghi, Experimental investigation of bitubal circular energy absorbers under quasi-static axial load, Thin Walled Struct., 89 (2015) 42-53.
[17] A. Alavi Nia, S. Chahardoli, Optimizing the layout of nested three-tube structures in quasi-static axial collapse, Thin Walled Struct., 107 (2016) 169-181.
[18] A.S.M.I.H. Committee, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials: ASM International, (1990).
[19] ASTM. International, ASTM E8/E8M - 09 Standard Test Methods for Tension Testing of Metallic Materials: ASTM, (2009).
[20] R. Suich, G. Derringer, Simultaneous optimization of several response variables, J. Qual. Tech., 12(4) (1980) 214-219.