Abstract
Lightweight foams with high damping capabilities are of great interest to designers. Such foams allow undesirable vibration to be passively attenuated. Metal foams with porosity values over 50% possess such characteristics, but it seems necessary to have accurate quantitative data on damping capacity of metal foams. Many researchers exclusively investigated the dynamic properties of aluminum and magnesium foams, although zinc alloys have higher damping capacity in a compact form. The purpose of this study is to evaluate the damping capacity and Young modulus of synthetic zinc foam. Here, zinc foams are produced by ALPORAS method and experimental modal analysis is employed to identify mentioned properties. Test setup and identification method based on the forced vibration and bending-vibration modes are discussed. The extracted damping’s ratios were in the range of 0.038–0.062 higher than reported values for other synthetic foams. The identified Young modulus of zinc foam with the density 1230 kg/m3 is 1.43 GPa which is close to that of aluminum foam with the same density.
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