Earth solids and dynamic nonlinear elasticity

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The authors` intention is to describe several manifestations of nonlinear behavior in rock. Nonlinear response may manifest itself in a variety of manners, including a nonlinear stress-strain relation, nonlinear attenuation, harmonic generation, resonant peak shift and slow dynamics, all of which are related. The authors have ample evidence that the responsible mechanism for nonlinear response [to first order] is the presence of compliant features and the influence of fluid. They define compliant features as those features that are the weakest in the rock, e.g., grain-to-grain contacts, low aspect ratio cracks, joints, etc. In addition, there may be other mechanisms responsible ... continued below

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8 p.

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Johnson, P.A. & Abeele, K.E.A. Van Den May 1, 1997.

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  • Johnson, P.A. Los Alamos National Lab., NM (United States). Nonlinear Elasticity Group
  • Abeele, K.E.A. Van Den Los Alamos National Lab., NM (United States). Nonlinear Elasticity Group

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Description

The authors` intention is to describe several manifestations of nonlinear behavior in rock. Nonlinear response may manifest itself in a variety of manners, including a nonlinear stress-strain relation, nonlinear attenuation, harmonic generation, resonant peak shift and slow dynamics, all of which are related. The authors have ample evidence that the responsible mechanism for nonlinear response [to first order] is the presence of compliant features and the influence of fluid. They define compliant features as those features that are the weakest in the rock, e.g., grain-to-grain contacts, low aspect ratio cracks, joints, etc. In addition, there may be other mechanisms responsible as yet unidentified. In the following, the authors emphasize the robust nature of observations by illustrating several experimental examples. They do not review the related theoretical framework. Finally, they do not present nonlinear parameters derived from these experiments as the purpose in this paper is to illustrate rather than quantify nonlinear response.

Physical Description

8 p.

Notes

OSTI as DE97005004

Source

  • International symposium on hydroacoustics and ultrasonics, Jurata (Poland), 12-16 May 1997

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  • Other: DE97005004
  • Report No.: LA-UR--97-691
  • Report No.: CONF-9705105--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 474869
  • Archival Resource Key: ark:/67531/metadc676027

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • May 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • March 1, 2016, 3:56 p.m.

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Johnson, P.A. & Abeele, K.E.A. Van Den. Earth solids and dynamic nonlinear elasticity, article, May 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc676027/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.