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ASTM D 2845 Document Information:
Title
Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock
ASTM International
Publication Date:
Jun 1, 2005
Scope:
(Footnote *)
This test method describes equipment and procedures for laboratory
measurements of the pulse
velocities of compression waves and shear waves in rock (1)(Footnote
2) and the determination of
ultrasonic elastic constants (Note 1) of an isotropic rock or one
exhibiting slight anisotropy.
NOTE 1 - The elastic constants determined by this test method are
termed ultrasonic since the pulse
frequencies used are above the audible range. The terms sonic and
dynamic are sometimes applied to
these constants but do not describe them precisely (2). It is possible
that the ultrasonic elastic
constants may differ from those determined by other dynamic methods.
This test method is valid for wave velocity measurements in both
anisotropic and isotropic rocks
although the velocities obtained in grossly anisotropic rocks may be
influenced by such factors as
direction, travel distance, and diameter of transducers.
The ultrasonic elastic constants are calculated from the measured wave
velocities and the bulk
density. The limiting degree of anisotropy for which calculations of
elastic constants are allowed
and procedures for determining the degree of anisotropy are specified.
The values stated in inch-pounds are to be regarded as the standard.
The SI values given in
parenthesis are provided for information purposes only.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Footnote * - A Summary of Changes section appears at the end of this
standard.
Footnote 2 - The boldface numbers in parentheses refer to the list of
references at the end of this
test method.
Keywords:
- compression testing
- anisotropy
- ultrasonic testing
- velocity-pulse
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