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Title: Multiaxial creep of natural rock salt

Abstract

Long-term multiaxial creep tests were performed on large, thin-walled cylinders of natural rock salt to investigate the relationship between the inelastic strain rate tensor and the stress tensor. The axial load, internal pressure, and external pressure on the specimens were controlled to obtain desired values of mean stress, octahedral shear stress, and Lode angle. The loads on the specimen were chosen so that the mean stress and octahedral shear stress were identical in nearly all tests, but that the Lode angle varied from 0[degree] to 30[degrees]. Test result show that for the thin-walled cylinder tests reported here, both strain-rate direction and strain-rate magnitude are better described by a Tresca-type flow rule than by a Mises-type flow rule. This conclusion is significant because use of a Tresca-type flow rule rather than a Mises-type flow rule produces much greater creep closures of underground openings in salt where the Lode angle deviates from 30[degrees] (triaxial compression).

Authors:
; ;  [1]
  1. (RE/SPEC, Inc., Rapid City, SD (United States))
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (United States); RE/SPEC, Inc., Rapid City, SD (United States)
Sponsoring Org.:
DOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6812526
Alternate Identifier(s):
OSTI ID: 6812526; Legacy ID: DE93007421
Report Number(s):
SAND-91-7083
ON: DE93007421
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ALPHA-BEARING WASTES; UNDERGROUND DISPOSAL; SALT DEPOSITS; CREEP; MATHEMATICAL MODELS; STRESSES; WIPP; FUNCTIONAL MODELS; GEOLOGIC DEPOSITS; MANAGEMENT; MATERIALS; MECHANICAL PROPERTIES; NATIONAL ORGANIZATIONS; NUCLEAR FACILITIES; PILOT PLANTS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTE FACILITIES; RADIOACTIVE WASTES; UNDERGROUND FACILITIES; US DOE; US ORGANIZATIONS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES 052002* -- Nuclear Fuels-- Waste Disposal & Storage; 990200 -- Mathematics & Computers

Citation Formats

Mellegard, K.D., Callahan, G.D., and Senseny, P.E. Multiaxial creep of natural rock salt. United States: N. p., 1992. Web.
Mellegard, K.D., Callahan, G.D., & Senseny, P.E. Multiaxial creep of natural rock salt. United States.
Mellegard, K.D., Callahan, G.D., and Senseny, P.E. Tue . "Multiaxial creep of natural rock salt". United States.
@article{osti_6812526,
title = {Multiaxial creep of natural rock salt},
author = {Mellegard, K.D. and Callahan, G.D. and Senseny, P.E.},
abstractNote = {Long-term multiaxial creep tests were performed on large, thin-walled cylinders of natural rock salt to investigate the relationship between the inelastic strain rate tensor and the stress tensor. The axial load, internal pressure, and external pressure on the specimens were controlled to obtain desired values of mean stress, octahedral shear stress, and Lode angle. The loads on the specimen were chosen so that the mean stress and octahedral shear stress were identical in nearly all tests, but that the Lode angle varied from 0[degree] to 30[degrees]. Test result show that for the thin-walled cylinder tests reported here, both strain-rate direction and strain-rate magnitude are better described by a Tresca-type flow rule than by a Mises-type flow rule. This conclusion is significant because use of a Tresca-type flow rule rather than a Mises-type flow rule produces much greater creep closures of underground openings in salt where the Lode angle deviates from 30[degrees] (triaxial compression).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {12}
}

Technical Report:
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