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Experimental Analysis of the Crushing of Honeycomb Cores Under Compression

  • Boubekeur Mohammed Bilel Mertani
  • Boualem KeskesEmail author
  • Mostapha Tarfaoui
Article
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Abstract

This paper presents an experimental study of the compressive response of hexagonal honeycomb core from the initial elastic regime to a fully crushed state. To understand the crushing mechanism, aluminum honeycomb core was compressed quasi-statically between rigid platens under displacement control. Honeycomb test specimens made of aluminum alloy with different configurations such as cell size, cell number, core density, and specimen size have been tested. During the crushing, the cells buckle elastically and collapse at a higher stress due to inelastic action, after the cells crush by progressive formation of folds on cell walls. The response densifies when folds consume the whole panel height. The peak load recorded during tests corresponded to the buckling of honeycomb cells. The different specimens showed similar load/displacement curves, and the differences observed were only due to the influence of the core density, number of cells, and specimens size on mechanical behavior of hexagonal honeycomb core which has a very important role in the energy absorption capacity. In addition, this study allowed us to build a database of experimental tests for various configurations and allowed us to know the precise energy absorption capacity.

Keywords

aluminum honeycomb core buckling compression load crushing energy absorption 

Notes

Acknowledgments

The authors gratefully acknowledge the Algerian and French state for the financial support of this work in the framework of program PROFAS B+ 2015–2016.

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Copyright information

© ASM International 2019

Authors and Affiliations

  • Boubekeur Mohammed Bilel Mertani
    • 1
    • 2
  • Boualem Keskes
    • 1
    Email author
  • Mostapha Tarfaoui
    • 2
  1. 1.Laboratoire de Mécanique de Précision Appliqué (LMPA), Institut d’Optique et de Mécanique de Précision (IOMP)Université Ferhat Abbas Sétif 1 (UFAS1)SétifAlgeria
  2. 2.IRDL UMR CNRS 6027ENSTA BretagneBrestFrance

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