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Stress-Strain Behavior of Sand under Monotonic and
Cyclic Loading in General Stress System and Its Elastoplastic Modeling
Masaya Hinokio, Teruo Nakai, Takuya Hoshikawa and
Hideo Yoshida
ABSTRACT : Usually it is very
difficult to model sand behavior as because its behavior is influenced
by density, confining pressure and in cyclic loading its behavior
changes drastically. In this paper a previously proposed sand model,
based on the modified stress tij, is extended to
simulate the behavior under different density and cyclic loading.
Inclusion of the parameter 'd' in the proposed model can express
the influence of density and confining pressure. Also, incorporating the
Hardening Limit Surface concept in the proposed model stabilization of
strains and increase of stiffness during cyclic loading can be
simulated. Proposed model predictions show good agreement with the
observed behavior in monotonic and cyclic triaxial and true triaxial
tests. Thus the model can be used to simulate sand behavior reasonably
under general three-dimensional stress conditions.Key words: anisotropy,
constitutive equation, cyclic shear, density, dilatancy (IGC: D6)
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