Show simple item record

dc.contributor.authorZhu, Cheng
dc.contributor.authorArson, Chloé
dc.date.accessioned2014-06-13T13:10:30Z
dc.date.available2014-06-13T13:10:30Z
dc.date.issued2013-07
dc.identifier.citationZhu, C. and Arson, C. (2013) Modeling the Influence of Thermo-Mechanical Crack Opening and Closure on Rock Stiffness. Poromechanics V: pp. 2526-2535. doi: 10.1061/9780784412992.294en_US
dc.identifier.urihttp://hdl.handle.net/1853/51979
dc.descriptionPresented at the Fifth Biot Conference on Poromechanics, Vienna, Austria, 10-12 July, 2013
dc.descriptionCopyright © 2013 by the American Society of Civil Engineers
dc.descriptionDOI: http://dx.doi.org/10.1061/9780784412992.294
dc.description.abstractA thermodynamic framework is proposed to model the effect of mechanical stress and temperature on crack opening and closure in rocks. The model is based on Continuum Damage Mechanics with damage defined as the second-order crack density tensor. The free energy of damaged rock is expressed as a function of deformation, temperature and damage. The damage criterion controls mode I crack propagation, captures temperature-induced decrease of rock toughness, and accounts for the increase of energy release rate necessary to propagate cracks induced by damage. Crack closure is modeled through unilateral effects produced on rock stiffness. Simulations show that: (1) under anisotropic mechanical boundary conditions, crack closure occurs during cooling, (2) the thermo-mechanical strain energy necessary to close cracks during cooling is larger than the strain energy needed to close the cracks by mechanical compression. Parametric study highlights the thermo-mechanical stress redistributions occurring during closure. The proposed framework is expected to bring new insights in the design and reliability assessment of geotechnical reservoirs and repositories.en_US
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectGeotechnical reservoirsen_US
dc.subjectCrack closureen_US
dc.subjectThermomechanical crack openingen_US
dc.subjectContinuum damage mechanics (CDM)en_US
dc.titleModeling the Influence of Thermo-Mechanical Crack Opening and Closure on Rock Stiffnessen_US
dc.typePost-printen_US
dc.typeProceedingsen_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Civil and Environmental Engineeringen_US
dc.identifier.doi10.1061/9780784412992.294
dc.embargo.termsnullen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record