Experimental evaluation of a constitutive model for inelastic flow and damage evolution in solids subjected to triaxial compression
- RE/SPEC, Inc., Rapid City, SD (United States)
- Southwest Research Inst., San Antonio, TX (United States)
- Sandia National Labs., Albuquerque, NM (United States)
Recent concern over the potential for creep induced development of a damaged rock zone adjacent to shafts and rooms at the Waste Isolation Pilot Plant (WIPP) has motivated the formulation of a coupled constitutive description of continuum salt creep and damage. This constitutive model gives time-dependent inelastic flow and pressure-sensitive damage in crystalline solids. Initially the constitutive model was successfully used to simulate multiaxial, i.e. true triaxial, experiments obtained at relatively high, 2.5 to 20 MPa, confining pressures. Predictions of the complete creep curve, including the heretofore unmodeled tertiary creep, were also demonstrated. However, comparisons of model predictions with data were hampered because the bulk of the creep data existing on WIPP salt was intentionally obtained under confining pressures typically greater than 15 MPa, in an attempt to match the underground in situ lithostatic pressure level. It was realized that the high confining pressures suppressed tertiary creep and resulted in better defined steady state creep responses. To address the tertiary creep process directly, a number of creep tests were conducted at lower confining pressures for the explicit purpose of creating dilatant behavior.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6596394
- Report Number(s):
- SAND-92-2185C; CONF-9306109--1; ON: DE93008351
- Country of Publication:
- United States
- Language:
- English
Similar Records
Damage-induced nonassociated inelastic flow in rock salt
Interim summary of Sandia creep experiments on rock salt from the WIPP study area, southeastern New Mexico
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALPHA-BEARING WASTES
CREEP
DAMAGE
DILATANCY
FUNCTIONAL MODELS
GEOLOGIC DEPOSITS
MANAGEMENT
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
PILOT PLANTS
PRESSURE EFFECTS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTES
SALT DEPOSITS
STRESSES
UNDERGROUND DISPOSAL
UNDERGROUND FACILITIES
US DOE
US ORGANIZATIONS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WIPP