Journal of Applied Mechanics · 1993 · 67 citations · 0 references
Attenuation CoefficientBiomedical AcousticsEngineeringMechanical EngineeringWave MotionComputational MechanicsNonlinear AcousticWave PhysicsVibrationsPower UltrasoundPhysical AcousticMechanicsRheologySound PropagationMaterial NonlinearitiesAcoustic MethodsStress WaveNonlinear ElasticityUltrasonicsWave PropagationAcoustic PropagationViscoelastic PropertiesSolid MechanicsUltrasoundStructural MechanicsMechanics Of MaterialsFilter Method
The following two solutions are proposed for deducing the viscoelastic properties of a solid from the change in the shape of a one-dimensional transient mechanical wave as it propagates through the medium: (i) The general solution:—the phase velocity and the attenuation coefficient are expressed in terms of the Fourier transforms of the pulse after two distances of travel, and (ii) A filter method. An experimental set-up is described. The results, which are obtained with no heating of the material, come within the audiofrequency range. This method fills a gap between the existing vibratory and ultrasonic methods.