Numerical Study of Damage in Unsaturated Geological and Engineered Barriers

dc.contributor.author Arson, Chloé
dc.contributor.author Gatmiri, Behrouz
dc.contributor.corporatename Texas A & M University. Dept of Civil Engineering en_US
dc.contributor.corporatename University of Tehran, Department of Civil Engineering, Iran en_US
dc.date.accessioned 2014-06-17T17:21:59Z
dc.date.available 2014-06-17T17:21:59Z
dc.date.issued 2011-04
dc.description Copyright © 2011 Elsevier Ltd.
dc.description DOI: http://dx.doi.org/10.1016/j.pce.2011.07.008
dc.description.abstract The theoretical framework of a damage model dedicated to non-isothermal unsaturated porous media is presented. The damage variable is a second-order tensor, and the model is formulated in independent state variables. The behavior laws are derived from a postulated expression of Helmholtz free energy. The damaged rigidities are computed by applying the Principle of Equivalent Elastic Energy (PEEE). Internal length parameters are introduced in the expressions of liquid water and vapor conductivities, to account for cracking effects on fluid flows. The damage model has been implemented in Θ-Stock Finite Element program. The mechanical aspect of the damage model is validated by simulating a triaxial compression test on a dry isothermal brittle material. Then, a sophisticated model of nuclear waste disposal, involving two non-isothermal unsaturated porous media, is reproduced. The results obtained in elasticity are in good agreement with the results presented in the corresponding reference article. A parametric study on initial damage is then performed to assess the influence of the Excavated Damaged Zone (EDZ) on the response of the nuclear waste repository during the heating phase. The trends meet the theoretical expectations. en_US
dc.embargo.terms null en_US
dc.identifier.citation C. Arson, B. Gatmiri, 2011. Numerical Study of Damage in Unsaturated Geological and Engineered Barriers, Physics and Chemistry of the Earth, vol.36, pp.1981-1989. DOI: 10.1016/j.pce.2011.07.008 en_US
dc.identifier.doi 10.1016/j.pce.2011.07.008
dc.identifier.uri http://hdl.handle.net/1853/52005
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Excavation Damaged Zone (EDZ) en_US
dc.subject Poromechanics en_US
dc.subject Unsaturated porous media en_US
dc.subject Thermo-hydro-mechanical damage model en_US
dc.title Numerical Study of Damage in Unsaturated Geological and Engineered Barriers en_US
dc.type Text
dc.type.genre Post-print
dspace.entity.type Publication
local.contributor.author Arson, Chloé
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
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relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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