A framework of an anisotropic elastoplastic model for clays

Abstract A framework of an anisotropic elastoplastic model is proposed that has potential applications to different types of clays. The model adopted the form of work dissipation based yield surface of Dafalias. A surface configuration parameter is introduced to the yield surface in addition to that of the plastic potential surface. This idea was motivated by the fact that different types of clays may have a reasonably close slope of critical state line in stress space but different shear strengths. The resulting yield surface is compared with yield surface data for 17 natural clays. The overall level of agreement is satisfactory.

[1]  A. Schofield,et al.  Yielding of Clays in States Wetter than Critical , 1963 .

[2]  Ioannis Vardoulakis,et al.  Constitutive laws for engineering materials: theory and application , 1987 .

[3]  M. Kavvadas,et al.  Non-linear consolidation around driven piles in clays , 1982 .

[4]  Majid T. Manzari,et al.  A simple anisotropic clay plasticity model , 2002 .

[5]  Majid T. Manzari,et al.  SANICLAY: simple anisotropic clay plasticity model , 2006 .

[6]  Yannis F. Dafalias,et al.  Simplifications to the bounding surface model for cohesive soils , 1989 .

[7]  P. K. Banerjee,et al.  Associated and non-associated constitutive relations for undrained behaviour of isotropic soft clays , 1978 .

[8]  P. K. Banerjee,et al.  A plasticity model for the mechanical behaviour of anisotropically consolidated clay , 1986 .

[9]  Andrew J. Whittle,et al.  Formulation of MIT-E3 constitutive model for overconsolidated clays , 1994 .

[10]  Yannis F. Dafalias,et al.  Bounding Surface Plasticity. III: Application to Anisotropic Cohesive Soils , 1986 .

[11]  S. Leroueil,et al.  Yielding of Mexico City clay and other natural clays , 1992 .

[12]  Andrew Schofield,et al.  Cambridge Geotechnical Centrifuge Operations , 1980 .

[13]  Leonard R. Herrmann,et al.  Bounding surface plasticity. II: application to isotropic cohesive soils , 1986 .

[14]  Yannis F. Dafalias,et al.  THEORETICAL ASPECTS OF THE ELASTOPLASTIC-VISCOPLASTIC BOUNDING SURFACE MODEL FOR COHESIVE SOILS , 1990 .

[15]  Yannis F. Dafalias,et al.  An anisotropic critical state soil plasticity model , 1986 .