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Article Dans Une Revue International Journal of Rock Mechanics and Mining Sciences Année : 2005

Very slow creep tests on rock samples

Résumé

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.
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Dates et versions

hal-00111443 , version 1 (20-04-2024)

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Paternité - Pas d'utilisation commerciale

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Pierre Bérest, Pierre Antoine Blum, Jean Pierre Charpentier, Hakim Gharbi, Frédéric Valès. Very slow creep tests on rock samples. International Journal of Rock Mechanics and Mining Sciences, 2005, 42 (4), pp.569-576. ⟨10.1016/j.ijrmms.2005.02.003⟩. ⟨hal-00111443⟩
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