Determining upper and lower bounds for steady state strain rate during a creep test on a salt sample - Mécanique des solides (LMS)
 Access content directly
Journal Articles International Journal of Rock Mechanics and Mining Sciences Year : 2020

Determining upper and lower bounds for steady state strain rate during a creep test on a salt sample

Abstract

A creep test performed on a Landes salt sample during one year and a half is described. During the first year, a 0.6 MPa axial load is applied to the sample. At the end of this one-year phase, strain rate (9×10−12s-1) is much faster than the strain rate extrapolated from high-stress tests. Steady state strain rate is not reached. In an attempt to reach steady state strain rate “from below”, a 0.9 MPa load is applied during two days before restoring the initial load (0.6 MPa). After the load is restored, reverse creep is observed first (strain rate sign changes before vanishing to zero after a few hours). Then, strain rate increases to reach 5×10−12s-1 after five months, slower than the strain rate before the load change. Commonly accepted constitutive laws can explain this effect, which provides a lower and an upper bound for steady state strain rate. This note presents a method to determine such bounds.
Fichier principal
Vignette du fichier
S1365160920308212.pdf (1.1 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02979235 , version 1 (23-08-2022)

Licence

Attribution - NonCommercial

Identifiers

Cite

Hakim Gharbi, Pierre Berest, Laura Blanco Martín, Benoît Brouard. Determining upper and lower bounds for steady state strain rate during a creep test on a salt sample. International Journal of Rock Mechanics and Mining Sciences, 2020, 134, pp.104452. ⟨10.1016/j.ijrmms.2020.104452⟩. ⟨hal-02979235⟩
81 View
75 Download

Altmetric

Share

Gmail Facebook X LinkedIn More