Abstract
Metallic foam metamaterials consist of an open-cell metallic microstructure completely saturated by a viscous material. In this chapter, dynamic responses of metamaterials containing foams with two distinct pore sizes as well as six different saturating materials are measured in controlled laboratory settings. The vibration dam** and isolation characteristics of the metamaterials are then analyzed using a lumped element approach. For all metamaterials tested, the saturating material increased the dam** ratio due to increased viscous dissipation arising from metal foam ligaments interacting with the viscous fluid. For the best performing saturated foam subject to a transient excitation, an order of magnitude increase in dam** ratio is observed, compared to the same off-the-shelf foam with no saturation. These results warrant further research into using metallic foam metamaterials for vibration dam** and isolation applications, including optimization of the metal foam microstructure/pore size, and optimal selection for saturating material including other viscous fluids as well as rubbers or elastomers.
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Cops, M.J., McDaniel, J.G., Magliula, E.A., Bamford, D.J. (2021). Metallic Foam Metamaterials for Vibration Dam** and Isolation. In: Ruffa, A.A., Toni, B. (eds) Recent Trends in Naval Engineering Research. STEAM-H: Science, Technology, Engineering, Agriculture, Mathematics & Health. Springer, Cham. https://doi.org/10.1007/978-3-030-64151-1_7
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DOI: https://doi.org/10.1007/978-3-030-64151-1_7
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