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Consequences of deviatoric normality in plasticity with isotropic strain hardening
Author(s) -
Baker R.,
Desai C. S.
Publication year - 1982
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.1610060308
Subject(s) - plasticity , normality , isotropy , hydrostatic pressure , strain hardening exponent , yield surface , yield (engineering) , materials science , hardening (computing) , strain (injury) , function (biology) , mathematics , hydrostatic equilibrium , geotechnical engineering , mechanics , geology , thermodynamics , physics , finite element method , statistics , composite material , constitutive equation , medicine , layer (electronics) , quantum mechanics , evolutionary biology , biology
For many soils experimental evidence suggests that deviation from normality between the plastic strain increments and the yield function is exhibited mainly in the volumetric behaviour, whereas the deviatoric behaviour exhibits normality. An analysis of the consequence of this observation is presented, and it leads to an expression for the plastic potential function as composed of two functions, a yield function and another dependent only on the hydrostatic pressure; the latter is considered to constitute the concept of correction functions presented recently by Desai and Siriwardane 13 .