Very slow creep tests on salt samples
| Autor: | F. Vales, P.A. Blum, J.F. Béraud, H. Gharbi, Pierre Berest, Benoît Brouard, V. de Greef, J. P. Charpentier |
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| Přispěvatelé: | Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Strain (chemistry) Physics QC1-999 020209 energy 020208 electrical & electronic engineering Extrapolation Mechanical engineering 02 engineering and technology Small strain Creep [SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Structural mechanics [physics.class-ph] 0202 electrical engineering electronic engineering information engineering Composite material Displacement (fluid) |
| Zdroj: | EPJ Web of Conferences, Vol 6, p 22002 (2010) EPJ Web of Conferences EPJ Web of Conferences, EDP Sciences, 2010, 6, ⟨10.1051/epjconf/20100622002⟩ |
| ISSN: | 2100-014X |
| DOI: | 10.1051/epjconf/20100622002 |
| Popis: | International audience; Long-term creep tests have been performed on rock-salt and argillite samples under very small uniaxial loadings (σ = 0.02 to 0.1 MPa) . To minimize the effects of temperature variations, testing devices were set in a mine where temperature fluctuations are of the order of one-hundredth of a degree Celsius. The mechanical loading was provided by dead weights. The deformations were measured through special displacement sensors with a resolution of ∆ε = 10-8. Strain rates as small as έ = 7 × 10-13s-1 were measured. These tests allow rock-sample creep to be investigated at very small strain rates. The tests also prove that extrapolation of constitutive laws at very small rates is often incorrect. |
| Databáze: | OpenAIRE |
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