Application of Resonant Ultrasound Spectroscopy to Inhomogeneous Materials

Abstract

Resonant Ultrasound Spectroscopy (RUS) has been used successfully to determine the elastic properties of single crystal and homogeneous materials. We have attempted to answer the following question. Under what conditions is RUS a useful tool for determining the moduli of macroscopic, inhomogeneous samples. We concentrated on identifying a sample geometry that will maximize success with RUS. The work consisted of numerical modeling of sample resonances under varying conditions, and empirical testing of rock samples. Numerical modeling and empirical testing indicate that RUS is a viable technique for characterizing the average isotropic elastic moduli of inhomogeneous materials, although larger RMS errors can be expected than for single crystal materials. Success with RUS can optimized by ensuring that the sample size is large compared to the scale of inhomogeneity and by using a high aspect ratio parallelepiped sample.

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Document Details

Document Type
Technical Report
Publication Date
Aug 10, 2000
Accession Number
ADA381149

Entities

People

  • Katherine R. Mccall

Organizations

  • University of Nevada, Reno

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustic Velocity
  • Acoustics
  • Aspect Ratio
  • Crystals
  • Eigenvalues
  • Elastic Properties
  • Elastic Waves
  • Frequency Shift
  • Geometry
  • Materials
  • Measurement
  • Physical Properties
  • Single Crystals
  • Spectroscopy
  • Three Dimensional
  • Waves

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.
  • Systems Analysis and Design