Creep modeling of rock salts for geoenvironmental application

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of Energy Resources Technology

DOI:https://doi.org/10.1115/1.2835326· OSTI ID:82958

Hossain, M I ^[1]; Faruque, M O; Zaman, M ^[2]

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1. SEARCH, Inc., Norman, OK (United States)
2. Univ. of Oklahoma, Norman, OK (United States)

Before using a rock salt as a nuclear waste repository, it is necessary to have adequate knowledge of the mechanical and thermomechanical behavior of the host geologic media. In rock salt, such mechanical and thermomechanical behavior is dominated, among other factors, by the time-dependent deformation commonly referred to as creep. The paper discusses a rate-dependent constitutive model to describe the creep deformation of rock salts. The model is based on the dislocation-related micromechanisms; the concept of effective stress is utilized by incorporating the back stress as an internal variable. The model is used to predict the creep potential of rock salt under general thermo-mechanical loading. The experimental test results from Avery Island dome salt are used in this work. The associated five model parameters are evaluated by using an optimization technique, called box algorithm. The parameters are then used with the model to predict unoptimized experimental data sets. The influence of temperature and confining pressure are investigated in detail for the selected rock salt. Overall, excellent correlations are observed.

• Sponsoring Organization: USDOE
• OSTI ID: 82958
• Journal Information: Journal of Energy Resources Technology, Journal Name: Journal of Energy Resources Technology Journal Issue: 2 Vol. 117; ISSN 0195-0738; ISSN JERTD2
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
CREEP
EXPERIMENTAL DATA
HEAT TRANSFER
HIGH-LEVEL RADIOACTIVE WASTES
MATHEMATICAL MODELS
RADIOACTIVE WASTE DISPOSAL
RESERVOIR PRESSURE
RESERVOIR ROCK
RESERVOIR TEMPERATURE
ROCK MECHANICS
SALT DEPOSITS