Uncoupled dual hardening model for clays considering the effect of overconsolidation and intermediate principal stress

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dc.contributor.author Prashant, Amit
dc.contributor.author Penumadu, Dayakar
dc.date.accessioned 2015-03-19T16:38:17Z
dc.date.available 2015-03-19T16:38:17Z
dc.date.issued 2015-10
dc.identifier.citation Prashant, Amit and Penumadu, Dayakar, “Uncoupled dual hardening model for clays considering the effect of overconsolidation and intermediate principal stress”, Acta Geotechnica, DOI: 10.1007/s11440-015-0377-9, vol. 10, no. 5, pp. 607-622, Oct. 2015.
dc.identifier.issn 1861-1133
dc.identifier.uri http://dx.doi.org/10.1007/s11440-015-0377-9
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1643
dc.description.abstract A constitutive model is proposed for clays based on the experimental observations from a series of flexible boundary true triaxial shear tests on cubical specimens of light to heavily overconsolidated kaolin clay. The proposed model adequately captures the combined effect of overconsolidation and intermediate principal stress. Overconsolidated clays often exhibit nonlinear stress–strain response at much lower stress levels than what is predicted by the existing constitutive theories/models. Experimental results for kaolin clay demonstrated sudden failure response before reaching the critical state, which became more prominent for higher relative magnitudes of intermediate principal stress. The observed stress state at failure is governed by the third invariant of stress tensor and the pre-failure yielding of the material by the second invariant of deviatoric stress tensor. The proposed constitutive model considers these issues with a few simplifying assumptions. The assumed yield surface has a droplet shape in q–p′ stress space with hardening based on both plastic volumetric and shear deformations. A dynamic failure criterion is employed in the current formulation that grows in size as a function of consolidation history. Pre-failure yielding is governed by a reference surface, which is different from the failure surface. en_US
dc.description.statementofresponsibility by Amit Prashant and Dayakar Penumadu
dc.format.extent vol. 10, no. 5, pp. 607-622
dc.language.iso en en_US
dc.publisher Springer en_US
dc.subject Clays en_US
dc.subject Constitutive model en_US
dc.subject Failure criteria en_US
dc.subject Overconsolidated en_US
dc.subject Strain hardening en_US
dc.subject Sudden failure response en_US
dc.subject Yield surface en_US
dc.title Uncoupled dual hardening model for clays considering the effect of overconsolidation and intermediate principal stress en_US
dc.type Article en_US
dc.relation.journal Acta Geotechnica


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