Characterization of Viscoelastic Materials Using Group Shear Wave Speeds.

ABSTRACT: Recent investigations of viscoelastic properties of materials have been performed by observing shear wave propagation following localized, impulsive excitations, and Fourier decomposing the shear wave signal to parameterize the frequency-dependent phase velocity using a material model. This paper describes a new method to characterize viscoelastic materials using group shear wave speeds , , and determined from the shear wave displacement, velocity, and acceleration signals, respectively. Materials are modeled using a two-parameter linear attenuation model with phase velocity and dispersion slope at a reference frequency of 200 Hz. Analytically calculated lookup tables are used to determine the two material parameters from pairs of measured group shear wave speeds. Green's function calculat

SUBMITTER: Rouze NC 

PROVIDER: S-EPMC5972540 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature