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Measurements of the longitudinal modulus of Pierre clay shale at varying strain rates

Bless, Stephan J. and Ahrens, Thomas J. (1977) Measurements of the longitudinal modulus of Pierre clay shale at varying strain rates. Geophysics, 42 (1). pp. 34-40. ISSN 0016-8033. doi:10.1190/1.1440710.

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The propagation speed of finite-amplitude compressional waves of strain-rate 10^3 - 10^4 sec^(-1) in Pierre clay shale have been measured using shock wave techniques. The inferred longitudinal modulus perpendicular to the bedding is approximately a factor of four higher than that measured by others in uniaxial strain tests at strain rates of 1-5 sec^(-1). The present shock wave speeds measured in the laboratory and in-situ finite-amplitude explosive experiments measured by others correlate more closely with field seismic velocities than with laboratory uniaxial strain measurements. Elastic properties of this highly saturated friable material measured parallel to the bedding are less sensitive to sampling disturbances than those measured in the perpendicular direction.

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Additional Information:© 1977 Society of Exploration Geophysicists. Manuscript received by the Editor November 4, 1975. We appreciate the assistance of H. Richeson, D. Johnson, and W. Gordy in carrying out the experimental program. Discussion with Dr. J. G. Trulio was helpful. We also wish to thank Dr. Joseph Zelasko for his review of the manuscript. This work was performed under contract FO4701-71-C-0016 from the U.S. Air Force Space and Missile Systems Organization, Norton AFB, Calif.
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Air Force Space and Missile Systems OrganizationFO4701-71-C-0016
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Caltech Division of Geological and Planetary Sciences2672
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Official Citation: S. J. Bless and T. J. Ahrens Measurements of the longitudinal modulus of Pierre clay shale at varying strain rates Geophysics, February 1977, v. 42, p. 34-40, doi:10.1190/1.1440710
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58806
Deposited By: Ruth Sustaita
Deposited On:08 Jul 2015 18:26
Last Modified:10 Nov 2021 22:10

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