Accession Number:

ADP011279

Title:

Elasticity of Steel and Silica Glass Spheres Under Gas Pressure by RUS

Descriptive Note:

Poster presentation

Corporate Author:

EHIME UNIV MATSUYAMA (JAPAN) FACULTY OF ENGINEERING*

Report Date:

2001-06-04

Pagination or Media Count:

1.0

Abstract:

Elasticity of minerals under high pressure are of great importance from geophysical view point. In order to develop a new method to measure pressure dependence of elastic constants, resonant ultrasound spectroscopy RUS were applied to the condition of gas pressure. We used a three-layered spherical shell assembly of spherical sample-thin gas layer-spherical cavity container, which works to give a well-defined boundary condition in the analysis. The samples measured were spheres of steel and silica glass with diameter of 4-5 mm. Several modes, not only torsional but also spheroidal modes, were observed at least up to 200MPa 2kbar under helium gas pressure, and pressure shifts of frequencies were obtained definitely in both samples. The data of the slope of pressure shift of frequency yield pressure derivatives of bulk modulus and shear modulus, dKdP and dGdP, which are in good agreement with previous data.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Properties of Metals and Alloys
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE