Title
Barodesy (Kolymbas, Medicus, Schneider-Muntau, Fellin)

Description
Barodesy is a constitutive model for granular media and does not use standard notations of elasto-plasticity, e.g. yield function, flow rule or plastic potential. Barodesy is formulated (like hypoplasticity) in one single rate equation to describe incremental soil response, i.e. the objective stress rate as a function of the actual effective Cauchy stress, the stretching and the void ratio. The User Subroutine is developed for barodesy for clay according to Medicus and Fellin (2017). Applications of the ABAQUS User Subroutine have been published in Schneider-Muntau et al. (2017) and Schneider-Muntau et al. (2017).
References
Fellin, W. Ostermann, A. (2002) Consistent tangent operators for constitutive rate-equations. International Journal for Numerical and Analytical Methods in Geomechanics 26(12): 1213-1233 [Preprint] 293.97 KB
Fellin, W., Ostermann, A. (2013) The critical state behaviour of barodesy compared with the Matsuoka–Nakai failure criterion. International Journal for Numerical and Analytical Methods in Geomechanics 37: 299 - 308 [Preprint] 252.12 KB
Kolymbas, D. (2015) Introduction to barodesy, Géotechnique 65(13): 52–65 [Preprint] 883.39 KB
Medicus, G. and Fellin, W. (2017) An improved version of barodesy for clay. Acta Geotechnica 12(2): 365–376 [Preprint] 504.69 KB
Medicus, G., Kolymbas, D. and Fellin, W. (2016) Proportional stress and strain paths in barodesy. International Journal for Numerical and Analytical Methods in Geomechanics 40(4): 509–522 [Preprint] 719.96 KB