A variational inequality-based formaulation of the frictional contact law with a non-associated sliding rule

type de publication	article dans une revue internationale avec comité de lecture
date de publication	2002
auteur(s)	Hjiaj Mohammed; De Saxce Géry; Mroz Zénon
journal	European Journal of Mechanics A/Solids
volume (numéro)	21 (1)
pages	49 – 59
résumé	We present a variational formulation of a complex frictional contact law with anisotropic friction condition and a non-associated sliding rule. The distinguishing characteristic of the proposed formulation is that the interface law, as well as its inverse, derive from a single scalar-valued function called bi-potential. This function, which depends on both the velocities and the associated forces, is split into the sum of two dual pseudo-potentials for standard multivalued laws. The main advantages of the formalism are the compact form taken by the present complex law and convexity property of the bi-potential that can be exploited for numerical purposes.
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