Constitutive behavior of reconsolidating crushed salt

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The constitutive model used to describe deformation of crushed salt is presented in this paper. Two mechanisms--dislocation creep and grain boundary diffusional pressure solutioning--are combined to form the basis for the constitutive model governing deformation of crushed salt. The constitutive model is generalized to represent three-dimensional states of stress. Recently completed creep consolidation tests are combined with an existing database that includes hydrostatic consolidation and shear consolidation tests conducted on Waste Isolation Pilot Plant (WIPP) and southeastern New Mexico salt to determine material parameters for the constitutive model. Nonlinear least-squares model fitting to data from shear consolidation tests and a ... continued below

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15 p.

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Callahan, G. D.; Mellegard, K. D. & Hansen, F. D. February 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

The constitutive model used to describe deformation of crushed salt is presented in this paper. Two mechanisms--dislocation creep and grain boundary diffusional pressure solutioning--are combined to form the basis for the constitutive model governing deformation of crushed salt. The constitutive model is generalized to represent three-dimensional states of stress. Recently completed creep consolidation tests are combined with an existing database that includes hydrostatic consolidation and shear consolidation tests conducted on Waste Isolation Pilot Plant (WIPP) and southeastern New Mexico salt to determine material parameters for the constitutive model. Nonlinear least-squares model fitting to data from shear consolidation tests and a combination of shear and hydrostatic tests produces two sets of material parameter values for the model. Changes in material parameter values from test group to test group indicate the empirical nature of the model but show significant improvement over earlier work. To demonstrate the predictive capability of the model, each parameter value set was used to predict each of the tests in the database. Based on fitting statistics and ability of the model to predict test data, the model appears to capture the creep consolidation behavior of crushed salt quite well.

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15 p.

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INIS; OSTI as DE98004224

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  • 3. North American Rock Mechanics Society conference, Cancun (Mexico), 3-5 Jun 1998

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  • Other: DE98004224
  • Report No.: SAND--98-0179C
  • Report No.: CONF-980620--
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/568994 | External Link
  • Office of Scientific & Technical Information Report Number: 653937
  • Archival Resource Key: ark:/67531/metadc702457

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • June 13, 2016, 6:54 p.m.

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Callahan, G. D.; Mellegard, K. D. & Hansen, F. D. Constitutive behavior of reconsolidating crushed salt, article, February 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc702457/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.