Show simple item record Tang, GX Graham, J 2007-09-10T11:36:57Z 2007-09-10T11:36:57Z 2002-08-30T11:36:57Z
dc.identifier.citation 0008-3674; CAN GEOTECH J, AUG 2002, vol. 39, no. 4, p.894 to 907. en
dc.description.abstract The paper proposes a new elastic-plastic framework for unsaturated, high-plasticity, clayey soils and sand-clay mixtures. The framework considers possible coupling of stress- and suction-induced hardening, leading to a yield surface that is closed or "capped" as suctions increase. This produces a stress state boundary surface in three-dimensional p-q-s stress space (where p is the net mean stress, q is the deviator stress, and s is the matric suction) which differs from that of other conceptual models of its kind. Yielding, a hardening law, and failure criteria for saturated soils are incorporated into the stress state boundary surface. Two parameters, equivalent pressure p(e) and stress ratio eta(s), are introduced to form the basis of the proposed elastic-plastic framework for highly plastic soils with high suctions. This provides an alternative for the stress variables net mean stress and matric suction that are commonly used in modeling unsaturated soils with lower plasticity and lower suctions. This framework has allowed results of experiments on an unsaturated sand-bentonite mixture to be successfully described using elastoplasticity. Yield and failure envelopes associated with the proposed state boundary surface in p-q-s space can be normalized using p(e) and eta(s) in such a way that they agree with a comparable envelope for saturated specimens. en
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dc.language.iso en_US
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dc.subject unsaturated en
dc.subject elastic-plastic en
dc.subject triaxial en
dc.subject matric suction en
dc.subject state boundary surface en
dc.subject sand-bentonite en
dc.subject SAND-BENTONITE en
dc.subject SATURATED SOILS en
dc.subject SHEAR-STRENGTH en
dc.subject CRITICAL-STATE en
dc.subject BEHAVIOR en
dc.subject CLAY en
dc.subject TEMPERATURE en
dc.subject MODEL en
dc.title A possible elastic-plastic framework for unsaturated soils with high-plasticity en
dc.status Peer reviewed en

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