@article {2011,
	title = {Quasistatic evolution in non-associative plasticity - the cap models},
	journal = {SIAM Journal on Mathematical Analysis 44, nr. 1 (2012) 245-292},
	number = {SISSA;05/2011/M},
	year = {2012},
	publisher = {SIAM},
	abstract = {Non-associative elasto-plasticity is the working model of plasticity for soil and rocks mechanics. Yet, it is usually viewed as non-variational. In this work, we prove a contrario the existence of a variational evolution for such a model under a natural capping assumption on the hydrostatic stresses and a less natural mollification of the stress admissibility constraint. The obtained elasto-plastic evolution is expressed for times that are conveniently rescaled.},
	keywords = {Elasto-plasticity},
	doi = {10.1137/110823511},
	url = {http://hdl.handle.net/1963/4139},
	author = {Jean-Francois Babadjian and Gilles A. Francfort and Maria Giovanna Mora}
}
