Extension of the M-D model for treating stress drops in salt
- Sandia National Labs., Albuquerque, NM (United States)
- RE/SPEC Inc., Rapid City, SD (US)
Development of the multimechanism deformation (M-D) constitutive model for steady state creep, which incorporates irreversible workhardening and recovery transient strains, was motivated by the need to predict very long term closures in underground rooms for radioactive waste repositories in salt. The multimechanism deformation model for the creep deformation of salt is extended to treat the response of salt to imposed stress drops. Stress drop tests produce a very distinctive behavior where both reversible elastic strain and reversible time dependent strain occur. These transient strains are negative compared to the positive transient strains produced by the normal creep workhardening and recovery processes. A simple micromechanical evolutionary process is defined to account for the accumulation of these reversible strains, and their subsequent release with decreases in stress. A number of experimental stress drop tests for various stress drop magnitudes and temperatures are adequately simulated with the model.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10173279
- Report Number(s):
- SAND-93-0377C; CONF-9309205-1; ON: DE93017637; TRN: 93:016754
- Resource Relation:
- Conference: 3. conference on the mechanical behavior of salt,Paliseau (France),14-16 Sep 1993; Other Information: PBD: 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
SALT DEPOSITS
CREEP
RADIOACTIVE WASTE FACILITIES
SALT CAVERNS
RADIOACTIVE WASTE STORAGE
MATHEMATICAL MODELS
DEFORMATION
MECHANICAL TESTS
STRESSES
LOSSES
STRAINS
STRESS RELAXATION
TIME DEPENDENCE
TRANSIENTS
TEMPERATURE DEPENDENCE
ELASTICITY
STEADY-STATE CONDITIONS
EXPERIMENTAL DATA
360603
052002
MECHANICAL PROPERTIES
WASTE DISPOSAL AND STORAGE