Nonlinear relaxation in geomaterials: New results

Lev Ostrovsky, A. Lebedev, S. Manakov, J. Riviere, P. Shokouhi, R. Guyer, M. Stuber Geesey, P. Johnson

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Numerous acoustic experiments demonstrate that in media with a complex structure, such as rock, the elastic response is characterized by (i) a decrease in the material modulus during wave excitation, typically with a hysteresis (fast nonlinear dynamics), and (ii) long-time recovery to the original equilibrium modulus (slow dynamics). Here, a physical model of a granular material with an inter-grain contact potential having one or more metastable wells suggested earlier is significantly developed to include a non-logarithmic stage and the joint action of excitation and recovery. Theoretical results are compared with our experimental data.

Original languageEnglish (US)
Article number032002
JournalProceedings of Meetings on Acoustics
Volume34
Issue number1
DOIs
StatePublished - Jan 1 2018
Event21st International Symposium on Nonlinear Acoustics, ISNA 2018 - Santa Fe, United States
Duration: Jul 9 2018Jul 13 2018

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recovery
contact potentials
granular materials
wave excitation
hysteresis
rocks
acoustics
excitation

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Ostrovsky, L., Lebedev, A., Manakov, S., Riviere, J., Shokouhi, P., Guyer, R., ... Johnson, P. (2018). Nonlinear relaxation in geomaterials: New results. Proceedings of Meetings on Acoustics, 34(1), [032002]. https://doi.org/10.1121/2.0000910
Ostrovsky, Lev ; Lebedev, A. ; Manakov, S. ; Riviere, J. ; Shokouhi, P. ; Guyer, R. ; Stuber Geesey, M. ; Johnson, P. / Nonlinear relaxation in geomaterials : New results. In: Proceedings of Meetings on Acoustics. 2018 ; Vol. 34, No. 1.
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Ostrovsky, L, Lebedev, A, Manakov, S, Riviere, J, Shokouhi, P, Guyer, R, Stuber Geesey, M & Johnson, P 2018, 'Nonlinear relaxation in geomaterials: New results', Proceedings of Meetings on Acoustics, vol. 34, no. 1, 032002. https://doi.org/10.1121/2.0000910

Nonlinear relaxation in geomaterials : New results. / Ostrovsky, Lev; Lebedev, A.; Manakov, S.; Riviere, J.; Shokouhi, P.; Guyer, R.; Stuber Geesey, M.; Johnson, P.

In: Proceedings of Meetings on Acoustics, Vol. 34, No. 1, 032002, 01.01.2018.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Nonlinear relaxation in geomaterials

T2 - New results

AU - Ostrovsky, Lev

AU - Lebedev, A.

AU - Manakov, S.

AU - Riviere, J.

AU - Shokouhi, P.

AU - Guyer, R.

AU - Stuber Geesey, M.

AU - Johnson, P.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Numerous acoustic experiments demonstrate that in media with a complex structure, such as rock, the elastic response is characterized by (i) a decrease in the material modulus during wave excitation, typically with a hysteresis (fast nonlinear dynamics), and (ii) long-time recovery to the original equilibrium modulus (slow dynamics). Here, a physical model of a granular material with an inter-grain contact potential having one or more metastable wells suggested earlier is significantly developed to include a non-logarithmic stage and the joint action of excitation and recovery. Theoretical results are compared with our experimental data.

AB - Numerous acoustic experiments demonstrate that in media with a complex structure, such as rock, the elastic response is characterized by (i) a decrease in the material modulus during wave excitation, typically with a hysteresis (fast nonlinear dynamics), and (ii) long-time recovery to the original equilibrium modulus (slow dynamics). Here, a physical model of a granular material with an inter-grain contact potential having one or more metastable wells suggested earlier is significantly developed to include a non-logarithmic stage and the joint action of excitation and recovery. Theoretical results are compared with our experimental data.

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