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SANISAND‐FN: An evolving fabric‐based sand model accounting for stress principal axes rotation
Author(s) -
Petalas Alexandros L.,
Dafalias Yannis F.,
Papadimitriou Achilleas G.
Publication year - 2019
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.2855
Subject(s) - dilatant , plasticity , geotechnical engineering , rotation (mathematics) , anisotropy , constitutive equation , stress path , modulus , stress (linguistics) , principal axis theorem , structural engineering , materials science , geometry , geology , mathematics , engineering , physics , composite material , finite element method , linguistics , philosophy , quantum mechanics
Summary SANISAND is the name of a family of bounding surface plasticity constitutive models for sand within the framework of critical state theory, which have been able to realistically simulate the sand behavior under conventional monotonic and cyclic loading paths. In order to incorporate the important role of evolving fabric anisotropy, one such model was modified within the framework of the new anisotropic critical state theory and named SANISAND‐F model. Yet the response under continuous stress principal axes rotation requires further modification to account for the effect of ensuing noncoaxiality on the dilatancy and plastic modulus. This modification is simpler than what is often proposed in the literature, since it does not incorporate an additional plastic loading mechanism and/or multiple dilatancy and plastic modulus expressions. The new model named SANISAND‐FN is presented herein and is validated against published data for loading that includes drained stress principal axes rotation on Toyoura sand.