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On the stress update algorithm of an advanced critical state elasto-plastic model and the effect of yield function equation
Finite elements in analysis and design
This paper investigates the computational performance of S-CLAY1S constitutive model by varying its yield function equation. S-CLAY1S is an advanced anisotropic elasto-plastic model that has been developed based on the extension of conventional critical state theory. In addition to modified Cam-Clay's hardening law, S-CLAY1S also accounts for inherent and evolving plastic anisotropy, interparticle bonding and degradation of bonds during plastic straining. A modified Newton-Raphson stress updatedoi:10.1016/j.finel.2014.06.009 fatcat:blz4x3oxqbba7jd6nmp7pdds6q