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Blast wave mitigation with galvanised polyurethane foam in a sandwich cladding

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Abstract

The sandwich cladding is a blast mitigation technique well described in the literature. One of the key parameters for its efficiency is a good knowledge on the crushable core placed inside the cladding. This paper focuses on galvanised polyurethane foams, a new family of hybrid materials which can fill the role of a crushable core. The galvanisation process allows to add a metal layer on top of a polyurethane foam, modifying its behaviour under tension and compression. This material was subjected to quasi-static tests and then placed inside a sandwich cladding allowing its dynamic characterisation under blast load. Using the methodology recommended by previous work, the energy absorption capacity of this new material has been determined based on the measured experimental stress–strain curves. The parameters of these curves, such as the plateau stress, densification strain, and energy absorption by unit volume, are directly linked to several parameters of the galvanisation process, including the Cu/Ni composite coating as well as the coating thickness. The results of this study present galvanised polyurethane foams as a serious alternative for crushable cores, which can be tailor-made to protect different targets by changing the parameters of the galvanisation process.

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Acknowledgements

The scientific results presented in this paper have been achieved with the financial support of the French Ministry of Defence, in the frame of an official subsidy agreement. Funding was provided by Direction Générale de l’Armement.

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Authors and Affiliations

  1. ISL, French German Research Institute of Saint Louis, 5 rue du General Cassagnou, BP 70034, 68301, Saint-Louis, France

    L. Blanc & M.-O. Sturtzer

  2. Applied Mechanics, Saarland University, Campus, Geb. A4.2, 1. OG, 66123, Saarbruecken, Germany

    A. Jung & S. Diebels

  3. Mac Panther Materials GmbH, Hanna-Kunath-Straße 19, 28199, Bremen, Germany

    A. Kleine

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  1. L. Blanc
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  2. A. Jung
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  3. S. Diebels
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  4. A. Kleine
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  5. M.-O. Sturtzer
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Correspondence to L. Blanc.

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Communicated by P. Hazell.

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Blanc, L., Jung, A., Diebels, S. et al. Blast wave mitigation with galvanised polyurethane foam in a sandwich cladding. Shock Waves 31, 525–540 (2021). https://doi.org/10.1007/s00193-021-01032-8

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  • DOI: https://doi.org/10.1007/s00193-021-01032-8

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