Accession Number : ADA298637

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

Descriptive Note : Annual summary rept. 30 May 94-30 May 95,

Corporate Author : CALIFORNIA UNIV LOS ANGELES INST OF GEOPHYSICS AND PLANETARY PHYSICS

Personal Author(s) : Anderson, Orson L.

PDF Url : ADA298637

Report Date : 01 AUG 1995

Pagination or Media Count : 4

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)

Descriptors :   *ELASTIC PROPERTIES, *IRON, *RESONANCE, *ULTRASONIC RADIATION, OPTIMIZATION, SPECTROSCOPY, VISCOELASTICITY, MODULUS OF ELASTICITY, HIGH PRESSURE, FUSED SILICA, ULTRASONICS, HELIUM, PRESSURIZATION, HYDROSTATIC PRESSURE.

Subject Categories : Properties of Metals and Alloys
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE