Blast wave mitigation with galvanised polyurethane foam in a sandwich cladding
| Autor: | M.-O. Sturtzer, A. Jung, A. Kleine, S. Diebels, L. Blanc |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Tension (physics) Mechanical Engineering General Physics and Astronomy engineering.material Cladding (fiber optics) Galvanization Core (optical fiber) Stress (mechanics) chemistry.chemical_compound symbols.namesake chemistry Coating engineering symbols Composite material Blast wave Polyurethane |
| Zdroj: | Shock Waves. 31:525-540 |
| ISSN: | 1432-2153 0938-1287 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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