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Discrete Modeling of the Crushing of Nomex Honeycomb Core and Application to Impact and Post-impact Behavior of Sandwich Structures

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Dynamic Failure of Composite and Sandwich Structures

Part of the book series: Solid Mechanics and Its Applications ((SMIA,volume 192))

Abstract

In this chapter, an original method for modeling the behavior of sandwich structures during and after impact is proposed and validated. It is based on the demonstration that Nomex honeycomb behaves in a post-buckling mode very early and that compression forces are taken up by the corners or vertical edges of the honeycomb cells in the same way as they are in the stiffeners in aircraft structures. Thus it is possible to represent the honeycomb discretely by a grid of springs located at the six corners of hexagonal cells. This approach represents the phenomenon of indentation on honeycomb alone or on sandwiches very well. This approach provides an understanding of how the sandwich and the core behave under compression after impact. An original criterion based on a local core crush is tested and validated to compute the residual strength. To consider the bending response of sandwich structures, a multi-level approach is also proposed.

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Author information

Authors and Affiliations

  1. INSA, ISAE, Mines-Albi, UPS; ICA (Institut Clément Ader), Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France

    Bruno Castanié & Jean-Jacques Barrau

  2. Mechanical Engineering Department, IIUM, Jl. Gombak, 10, 50728, Kuala Lumpur, Malaysia

    Yulfian Aminanda

  3. EADS Innovation Works, 12 rue Pasteur, 76, 92152, Suresnes Cedex, France

    Pascal Thevenet

Authors
  1. Bruno Castanié
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  2. Yulfian Aminanda
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  3. Jean-Jacques Barrau
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  4. Pascal Thevenet
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Corresponding author

Correspondence to Bruno Castanié .

Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering and, Southern Illinois University, Lincoln Drive 2030, Carbondale, 62901-6603, Illinois, USA

    Serge Abrate

  2. INSA Toulouse, Institut Clément Ader, Avenue de Rangueil 135, Toulouse Cedex 4, 31077, France

    Bruno Castanié

  3. Program Manager, Solid Mechanics, One Liberty Center (Suite 1425), Office of Naval Research (ONR 332), North Randolph Street 875, Arlington, 22203-1995, Virginia, USA

    Yapa D. S. Rajapakse

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Castanié, B., Aminanda, Y., Barrau, JJ., Thevenet, P. (2013). Discrete Modeling of the Crushing of Nomex Honeycomb Core and Application to Impact and Post-impact Behavior of Sandwich Structures. In: Abrate, S., Castanié, B., Rajapakse, Y. (eds) Dynamic Failure of Composite and Sandwich Structures. Solid Mechanics and Its Applications, vol 192. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5329-7_10

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  • DOI: https://doi.org/10.1007/978-94-007-5329-7_10

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-5328-0

  • Online ISBN: 978-94-007-5329-7

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