A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations

B.G.A. van Oosterhout; S.J.T. Hangx; C.J. Spiers

doi:10.1201/9781003295808-6

A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations

B.G.A. van Oosterhout, S.J.T. Hangx, C.J. Spiers

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

Abstract

At low deviatoric stress, flow of rock salt is expected to be controlled by pressure
solution creep. This requires a fluid phase to be present in grain boundaries in the form of
adsorbed grain boundary films or a dynamically wetting island-channel structure. However,
whether such structures can persist at low stress or will be eliminated by healing phenomena
is open to question. In this study, a model is derived describing a threshold stress for pressure
solution, below which healing occurs, and creep is stopped. The results predict that pressure
solution creep in rock salt, at depths up to 3 km, is inhibited below a deviatoric stress of 0.07
to 0.7 or at most 0.90 MPa. When deviatoric stresses in rock salt drop below this threshold
stress, a decrease in strain rate from ~10−13 to 10−18 s−1 is expected, due to a switch to
dislocation creep. The model needs to be tested against CT experiments or optical
observations on grain boundary behavior under stress, and against confined creep tests at
very low deviatoric stress, as far as technically feasible. If confirmed, the effect of this threshold
stress needs to be considered in future numerical studies of flow in rock salt.

Original language	English
Title of host publication	The Mechanical Behavior of Salt X
Subtitle of host publication	Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022
Editors	J.H.P. de Bresser, M.R. Drury, P. A. Fokker, M. Gazzani, S.J.T. Hangx, A.R. Niemeijer, C.J. Spiers
Place of Publication	London
Publisher	CRC Press
Pages	57-67
Number of pages	11
Edition	1
ISBN (Electronic)	9781003295808
ISBN (Print)	9781032282206
DOIs	https://doi.org/10.1201/9781003295808-6
Publication status	Published - 5 Jul 2022
Event	10th Conference on the Mechanical Behavior of Salt - Utrecht University, Utrecht, Netherlands Duration: 6 Jul 2022 → 8 Jul 2022

Conference

Conference	10th Conference on the Mechanical Behavior of Salt
Abbreviated title	SaltMech X
Country/Territory	Netherlands
City	Utrecht
Period	6/07/22 → 8/07/22

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10.1201_9781003295808-6_chapterpdfFinal published version, 3.19 MBLicence: CC BY-NC-ND

1 Book editing

The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022
de Bresser, J. H. P. (Editor), Drury, M. R. (Editor), Fokker, P. A. (Editor), Gazzani, M. (Editor), Hangx, S. J. T. (Editor), Niemeijer, A. R. (Editor) & Spiers, C. J. (Editor), 5 Jul 2022, 1 ed. London: CRC Press. 690 p.
Research output: Book/Report › Book editing › Academic

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van Oosterhout, B. G. A., Hangx, S. J. T., & Spiers, C. J. (2022). A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations. In J. H. P. D. Bresser, M. R. Drury, P. A. Fokker, M. Gazzani, S. J. T. Hangx, A. R. Niemeijer, & C. J. Spiers (Eds.), The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022 (1 ed., pp. 57-67). CRC Press. https://doi.org/10.1201/9781003295808-6

van Oosterhout, B.G.A. ; Hangx, S.J.T. ; Spiers, C.J. / A threshold stress for pressure solution creep in rock salt : Model predictions vs. observations. The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022. editor / J.H.P. de Bresser ; M.R. Drury ; P. A. Fokker ; M. Gazzani ; S.J.T. Hangx ; A.R. Niemeijer ; C.J. Spiers. 1. ed. London : CRC Press, 2022. pp. 57-67

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abstract = "At low deviatoric stress, flow of rock salt is expected to be controlled by pressure solution creep. This requires a fluid phase to be present in grain boundaries in the form of adsorbed grain boundary films or a dynamically wetting island-channel structure. However, whether such structures can persist at low stress or will be eliminated by healing phenomena is open to question. In this study, a model is derived describing a threshold stress for pressure solution, below which healing occurs, and creep is stopped. The results predict that pressure solution creep in rock salt, at depths up to 3 km, is inhibited below a deviatoric stress of 0.07 to 0.7 or at most 0.90 MPa. When deviatoric stresses in rock salt drop below this threshold stress, a decrease in strain rate from \textasciitilde{}10−13 to 10−18 s−1 is expected, due to a switch to dislocation creep. The model needs to be tested against CT experiments or optical observations on grain boundary behavior under stress, and against confined creep tests at very low deviatoric stress, as far as technically feasible. If confirmed, the effect of this threshold stress needs to be considered in future numerical studies of flow in rock salt.",

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van Oosterhout, BGA , Hangx, SJT & Spiers, CJ 2022, A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations. in JHPD Bresser, MR Drury, PA Fokker, M Gazzani, SJT Hangx, AR Niemeijer & CJ Spiers (eds), The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022. 1 edn, CRC Press, London, pp. 57-67, 10th Conference on the Mechanical Behavior of Salt, Utrecht, Netherlands, 6/07/22. https://doi.org/10.1201/9781003295808-6

A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations. / van Oosterhout, B.G.A.; Hangx, S.J.T.; Spiers, C.J.
The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022. ed. / J.H.P. de Bresser; M.R. Drury; P. A. Fokker; M. Gazzani; S.J.T. Hangx; A.R. Niemeijer; C.J. Spiers. 1. ed. London: CRC Press, 2022. p. 57-67.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

TY - GEN

T1 - A threshold stress for pressure solution creep in rock salt

T2 - 10th Conference on the Mechanical Behavior of Salt

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N2 - At low deviatoric stress, flow of rock salt is expected to be controlled by pressure solution creep. This requires a fluid phase to be present in grain boundaries in the form of adsorbed grain boundary films or a dynamically wetting island-channel structure. However, whether such structures can persist at low stress or will be eliminated by healing phenomena is open to question. In this study, a model is derived describing a threshold stress for pressure solution, below which healing occurs, and creep is stopped. The results predict that pressure solution creep in rock salt, at depths up to 3 km, is inhibited below a deviatoric stress of 0.07 to 0.7 or at most 0.90 MPa. When deviatoric stresses in rock salt drop below this threshold stress, a decrease in strain rate from ~10−13 to 10−18 s−1 is expected, due to a switch to dislocation creep. The model needs to be tested against CT experiments or optical observations on grain boundary behavior under stress, and against confined creep tests at very low deviatoric stress, as far as technically feasible. If confirmed, the effect of this threshold stress needs to be considered in future numerical studies of flow in rock salt.

AB - At low deviatoric stress, flow of rock salt is expected to be controlled by pressure solution creep. This requires a fluid phase to be present in grain boundaries in the form of adsorbed grain boundary films or a dynamically wetting island-channel structure. However, whether such structures can persist at low stress or will be eliminated by healing phenomena is open to question. In this study, a model is derived describing a threshold stress for pressure solution, below which healing occurs, and creep is stopped. The results predict that pressure solution creep in rock salt, at depths up to 3 km, is inhibited below a deviatoric stress of 0.07 to 0.7 or at most 0.90 MPa. When deviatoric stresses in rock salt drop below this threshold stress, a decrease in strain rate from ~10−13 to 10−18 s−1 is expected, due to a switch to dislocation creep. The model needs to be tested against CT experiments or optical observations on grain boundary behavior under stress, and against confined creep tests at very low deviatoric stress, as far as technically feasible. If confirmed, the effect of this threshold stress needs to be considered in future numerical studies of flow in rock salt.

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BT - The Mechanical Behavior of Salt X

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PB - CRC Press

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van Oosterhout BGA , Hangx SJT , Spiers CJ. A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations. In Bresser JHPD, Drury MR, Fokker PA, Gazzani M, Hangx SJT, Niemeijer AR, Spiers CJ, editors, The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022. 1 ed. London: CRC Press. 2022. p. 57-67 doi: 10.1201/9781003295808-6

A threshold stress for pressure solution creep in rock salt: Model predictions vs. observations

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Research output

The Mechanical Behavior of Salt X: Proceedings of the 10th Conference on the Mechanical Behavior of Salt (SaltMech X), Utrecht, The Netherlands, 06-08 July 2022

Cite this