Measurement of the Pressure Derivatives of Elastic Constants Using Resonance Ultrasound Spectroscopy.

Abstract

Our primary goal is the measurement of the third order elastic constants of solids using resonance ultrasound spectroscopy (RUS). Progress on the construction of a new apparatus by which RUS measurements are made at elevated pressure is described. We chose materials which provide optimal values of alpha K sub tau for our initial set of measurements, and describe the relevant thermodynamic relations. Initial pressure runs with helium and argon pressurizing mediums for fused silica and KCl have been made, but their interpretation requires further analysis of the spectral data. Considerations regarding the measurement of third order elastic constants that are not obtained from purely hydrostatic stresses are presented. Completed RUS projects regarding the specimen size effects on measured elastic moduli, the elastic properties of Fe0.943O and the elastic/viscoelastic properties of iron are summarized. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1995
Accession Number
ADA298637

Entities

People

  • Orson L. Anderson

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bulk Modulus
  • Elastic Properties
  • Frequency
  • Frequency Shift
  • High Pressure
  • High Temperature
  • Isotherms
  • Materials
  • Measurement
  • Optical Materials
  • Physics
  • Resonance
  • Resonant Frequency
  • Secondary Waves
  • Spectroscopy
  • Ultrasounds
  • Waves

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design