A new anisotropic poroelasticity model to describe damage accumulation during cyclic triaxial loading of rock

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dc.catalogadorjca
dc.contributor.authorLyakhovsky, Vladimir
dc.contributor.authorPanteleev, Ivan
dc.contributor.authorShalev, Eyal
dc.contributor.authorBrowning, John
dc.contributor.authorMitchell, Thomas
dc.contributor.authorHealy, David
dc.contributor.authorMeredith, Philip G.
dc.date.accessioned2024-06-06T14:28:09Z
dc.date.available2024-06-06T14:28:09Z
dc.date.issued2022
dc.description.abstractCrustal rocks undergo repeated cycles of stress over time. In complex tectonic environments where stresses may evolve both spatially and temporally, such as volcanoes or active fault zones, these rocks may experience not only cyclic loading and unloading, but also rotation and/or reorientation of stresses. In such situations, any resulting crack distributions form sequentially and may therefore be highly anisotropic. Thus, the tectonic history of the crust as recorded in deformed rocks may include evidence for complex stress paths, encompassing different magnitudes and orientations. Despite this, the ways in which variations in principal stresses influence the evolution of anisotropic crack distributions remain poorly constrained. In this work, we build on the previous non-linear anisotropic damage rheology model by presenting a newly developed poroelastic rheological model which accounts for both coupled anisotropic damage and porosity evolution. The new model shares the main features of previously developed anisotropic damage and scalar poroelastic damage models, including the ability to simulate the entire yield curve through a single formulation. In the new model, the yield condition is defined in terms of invariants of the strain tensor, and so the new formulation operates with directional yield conditions (different values for each principal direction) depending on the damage tensor and triaxial loading conditions. This allows us to discern evolving yield conditions for each principal stress direction and fit the measured amounts of accumulated damage from previous loading cycles. Coupling between anisotropic damage and anisotropic compaction along with the damage-dependent yield condition produces a reasonable fit to the experimentally obtained stress–strain curves. Furthermore, the simulated time-dependent cumulative damage is well correlated with experimentally observed acoustic emissions during cyclic loading in different directions. As such, we are able to recreate many of the features of the experimentally observed directional 3-D Kaiser ‘damage memory’ effect.
dc.fechaingreso.objetodigital2024-11-14
dc.fuente.origenORCID
dc.identifier.doi10.1093/gji/ggac062
dc.identifier.issn0956-540X
dc.identifier.urihttps://doi.org/10.1093/gji/ggac062
dc.identifier.urihttps://academic.oup.com/gji/article/230/1/179/6526872
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/86506
dc.information.autorucEscuela de Ingeniería; Browning , John; 0000-0001-8022-6234; 1081089
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final201
dc.pagina.inicio179
dc.revistaGeophysical Journal International
dc.rightsacceso restringido
dc.subjectCreep and deformation
dc.subjectElasticity and anelasticity
dc.subjectFracture and flow
dc.subjectMechanics, theory, and modelling
dc.subject.ddc570
dc.subject.deweyBiologíaes_ES
dc.titleA new anisotropic poroelasticity model to describe damage accumulation during cyclic triaxial loading of rock
dc.typeartículo
dc.volumen230
sipa.codpersvinculados1081089
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