Comparison of numerical and effective-medium modeling of porosity in layered media
journal contributionposted on 06.10.2015, 10:54 by Istvan A. Veres, Robert A. Smith, Valerie PinfieldValerie Pinfield
In this study, modeling approaches for porosity in layered media are presented and compared. First, an effective-medium model is used to account for the frequencydependent attenuation of the elastic waves. The effective-medium model is based on a single-scattering approach, i.e., it neglects multiple-scattering effects. Then, the effective-medium model is compared in time-domain finite element simulations. The numerical model allows the study of the scattering of the elastic waves on randomly distributed spherical cavities and also accounts for multiple-scattering effects. The models are compared to investigate the validity of the effective-medium model approach. The calculated reflected laminate responses and transmission spectra from the two models show a good agreement.
Support is acknowledged from an ongoing Fellowship in Manufacturing of the UK Engineering and Physical Sciences Research Council (EPSRC; EP/K037315/1).
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