Experimental Investigation of the Maximum Axial Force in the Folding Process of Aluminum Square Columns
In this paper, a semi empirical formula is presented based on the experimental results to predict the first pick (maximum force) value in the instantaneous folding force- axial distance diagram of a square column. To achieve this purpose, the maximum value of the folding force was assumed to be a function of the average folding force. Using the experimental results, the maximum value of the force necessary to initiate the first fold in a square column was obtained with respect to the geometrical quantities and material properties. Finally, the results obtained from the semi empirical relation in this paper, were compared to the experimental results which showed a good correlation.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1062932Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1560
 D. Mohr, and M. Doyoyo, "Deformation-induced folding systems in thin-walled monolithic hexagonal metallic honeycomb," International Journal of Solids and Structures, vol. 4, pp. 3353-3377, 2004.
 A. Niknejad, G. H. Liaghat, A. H. Behravesh, and H. M. Naeini, "Theoretical investigation of the instantaneous folding force during the first fold creation in a square column," International Conference on Applied Mechanics and Mechanical Engineering,, Bangkok, pp. 332- 337, 2008.
 T. Wierzbicki, and W. Abramowicz, "On the Crushing Mechanics of Thin-Walled Structures," Journal of Applied Mechanics, vol. 50, pp. 727-734, 1983.
 R. J. Hayduk, and T. Wierzbicki, "Extensional Collapse Modes of Structural Members," Computers and Structures, vol. 18, pp. 447-458, 1984.
 W. Abramowicz, "The Effective Crushing Distance in Axially Compressed Thin-Walled Metal Columns," International Journal of Impact Engineering, vol. 1(3), pp. 309-317, 1983.
 W. Abramowicz, and N. Jones, "Dynamic Axial Crushing of Square Tubes," International Journal of Impact Engineering, vol. 2(2), pp. 179-208, 1984.
 W. Abramowicz, and T. Wierzbicki, "Axial Crushing of Foam-Filled Columns," International Journal of Mechanical Sciences, vol. 30(3/4), pp. 263-271, 1988.
 W. Abramowicz, and T. Wierzbicki, "Axial Crushing of Multicorner Sheet Metal Columns," Journal of Applied Mechanics, vol. 56, pp. 113- 120, 1989.
 G. H. Liaghat, and A. Alavinia, "A Comment on the Axial Crush of Metallic Honeycombs by Wu and Jiang," International Journal of Impact Engineering, vol. 28, pp. 1143-1146, 2003.
 G. H. Liaghat, H. R. Daghiani, M. Sedighi, and A. Alavinia, "Dynamic Crushing of Honeycomb panel under Impact of Cylindrical Projectile," Amirkabir Journal, vol. 53, pp. 68-79, 2002.
 G. H. Liaghat, M. Sedighi, H. R. Daghiani, and A. Alavinia, "Crushing of Metal honeycomb structures under Quasi-static Loads," Tehran University Journal, vol. 37(1), pp. 145-156, 2003.
 J. Zamani, M. Soleimani, A. Darvizeh, and G. H. Liaghat, "Numerical Analysis of Full Folding of Thin-Walled Structures with Square Crosssection by LS-DYNA," Fourteenth International Conference of Mechanical Engineering,, Iran, 2006.
 A. Alavinia, and G. H. Liaghat, "Investigation of Properties and Quasistatic Analysis of Honeycombs," Twelfth International Conference of Mechanical Engineering, Tehran, 2004.
 A. Alavinia, and G. H. Liaghat, "Dynamic Crushing of Thin-Walled Columns under Impact of Projectile," Twelfth International Conference of Mechanical Engineering, Tehran, 2004.
 J. Zamani, and G. H. Liaghat, "Effect of Honeycomb Main Properties under Impact Loads," Tenth International Conference of Mechanical Engineering, Iran, pp. 687-689, 2002.
 S. Santosa, and T. Wierzbicki, "Effect of Ultralight Metal Filler on the Bending Collapse Behavior of Thin-Walled Prismatic Columns," International Journal of Mechanical Sciences, vol. 41, pp. 995-1019, 1999.
 S. Santosa, T. Wierzbicki, A. G. Hanssen, and M. Langseth, "Experimental and Numerical Studies of Foam-Filled Sections," International Journal of Impact Engineering, vol. 24, pp. 509-534, 2000.
 W. Chen, and T. Wierzbicki, "Relative Merits of Single-Cell, Multi-Cell and Foam-Filled Thin-Walled Structures in Energy Absorption," Thin- Walled Structures, vol. 39, pp. 287-306, 2001.
 X. Zhang, G. Cheng, and H. Zhang, "Theoretical Prediction and Numerical Simulation of Multi-Cell Square Thin-Walled Structures," Thin-Walled Structures, vol. 44, pp. 1185-1191, 2006.
 M. Langseth, O. S. Hopperstad, and A. G. Hanssen, "Crash Behaviour of Thin-Walled Aluminium Members," Thin-Walled structures, vol. 32, pp. 127-150, 1998.