Non-linear anisotropic damage rheology model: Theory and experimental verification

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dc.article.number104085
dc.catalogadorgjm
dc.contributor.authorPanteleev, Ivan
dc.contributor.authorLyakhovsky, Vladimir
dc.contributor.authorBrowning, John
dc.contributor.authorMeredith, Philip G.
dc.contributor.authorHealy, David
dc.contributor.authorMitchell, Thomas M.
dc.date.accessioned2024-05-30T16:23:15Z
dc.date.available2024-05-30T16:23:15Z
dc.date.issued2021
dc.description.abstractWe extend the isotropic non-linear damage rheology model with a scalar damage parameter to a more complex formulation that accounts for anisotropic damage growth under true triaxial loading. The model takes account of both the anisotropy of elastic properties (associated with textural rock structure) and the stress- and damage-induced anisotropy (associated with loading). The scalar, isotropic model is modified by assuming orthotropic symmetry and introducing a second-order damage tensor, the principal values of which describe damage in three orthogonal directions associated with the orientations of the principal loading axes. Different damage components, accumulated under true triaxial loading conditions, allows us to reproduce both stress-strain curves and damage- and stress-induced seismic wave velocity anisotropy. The suggested model generalization includes a non-classical energy term similar to the isotropic non-linear scalar damage model, which allows accounting for the abrupt change in the effective elastic moduli upon stress reversal. For calibration and verification of the model parameters, we use experimental stress-strain curves from deformation of dry sandstone under both conventional and true triaxial stress conditions. Cubic samples were deformed in three orthogonal directions with independently controlled stress paths. To characterize crack damage, changes in ultrasonic P-wave velocities in the three principal directions were measured, together with the bulk acoustic emission output. The parameters of the developed model were constrained using the conventional triaxial test data, and provided good fits to the stress-strain curves and P-wave velocity variations in the three orthogonal directions. Numerical simulation of the true triaxial test data demonstrates that the anisotropic damage rheology model adequately describes both non-linear stress-strain behavior and P-wave velocity variations in the tested Darley Dale sandstone.
dc.fechaingreso.objetodigital2024-12-12
dc.format.extent14 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.euromechsol.2020.104085
dc.identifier.urihttp://dx.doi.org/10.1016/j.euromechsol.2020.104085
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/86040
dc.identifier.wosidWOS:000587837000011
dc.information.autorucEscuela de Ingeniería; Browning, John; 0000-0001-8022-6234; 1081089
dc.language.isoen
dc.nota.accesoContenido parcial
dc.revistaEuropean Journal of Mechanics - A/Solids
dc.rightsacceso restringido
dc.subjectTrue triaxial loading
dc.subjectNon-linear elasticity
dc.subjectDamage induced anisotropy
dc.subjectRheology
dc.subjectDamage tensor
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods11 Sustainable cities and communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleNon-linear anisotropic damage rheology model: Theory and experimental verification
dc.typeartículo
dc.volumen85
sipa.codpersvinculados1081089
sipa.trazabilidadORCID;2024-05-27
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