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An elastoplastic constitutive model for cyclic behaviour of sands
Author(s) -
Hirai Hiroyoshi
Publication year - 1987
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.1610110506
Subject(s) - yield surface , monotonic function , plasticity , constitutive equation , hardening (computing) , critical state soil mechanics , geotechnical engineering , materials science , yield (engineering) , penetration (warfare) , triaxial shear test , mechanics , boundary value problem , stress path , structural engineering , mathematics , geology , engineering , finite element method , composite material , mathematical analysis , physics , shear (geology) , operations research , layer (electronics)
The constitutive model of sands is proposed to describe the characteristics of plastic behaviour for cyclic loadings. A non‐associated flow rule is used and both yield function and plastic potential are generalized forms of the Modified Cam clay model. The hardening parameter is represented by the plastic work related to different portions of volumetric and deviatoric changes. The boundary surface is employed to describe the plastic strain within the yield surface. The directional independency of yield condition in triaxial compression and extension tests is extended to that in general stress states. Several drained and undrained cyclic tests are predicted and the comparison is made with experimental results. The proposed model is capable of representing the monotonic and cyclic behaviours of sands with reasonable accuracy. The simulation is performed for both included and excluded membrane penetration effects and it is suggested that the membrane penetration causes the significant influences on the results of undrained cyclic tests.