Acoustical and mechanical characterization of anisotropic open-cell foams

摘要: Acoustical (viscous static permeability, tortuosity, and viscous characteristic length) mechanical (skeleton viscoelasticity tensor) parameters which characterize the behavior of porous media are provided from measurements along three perpendicular axes. The performed on cubic samples open-cell foams. longitudinal direction is chosen to be parallel growth foam. results show that tested here exhibit a quasi-axisymmetrical geometry. It appears precise description this type reticulated polymeric foam must include its anisotropy, especially for vibroacoustic prediction.