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https://hdl.handle.net/2142/25724
Description
Title
The third order elastic constants of aluminum
Author(s)
Thomas, Joseph Francis
Issue Date
1968
Doctoral Committee Chair(s)
Granato, A.V.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
third order elastic constants
aluminum
uniaxial stress derivatives
natural sound velocities
interferometric techniques
Language
en
Abstract
The complete set of six third order elastic constants of single
crystal A1 has been experimentally determined by measuring both hydrostatic
pressure and uniaxial stress derivatives of the natural sound
velocities using a two specimen interferometric technique. The values
obtained are ...in units of 101 2 dyn.cm -2 • I The specimens were neutron irradiated to
eliminate dislocation effects~ from the uniaxial experiments. A se1fconsistent
set ofhyd,rostatic pressure derivatives of the second order
elastic constants has been calculated from the measured third order
elastic constants. The' third order elastic constants have also been
used to calculate the thermal expansion in the anisotropic continuum
moqe1 at both high and low temperatures, and a comparison has been
made to the directly measured expansion coefficients.
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