Titlebook: Unilateral Problems in Structural Analysis — 2; Proceedings of the S G. Piero,F. Maceri Conference proceedings 1987 Springer-Verlag Wien 19

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Contact Unilateral Avec Adherence une Theorie du Premier Gradient,e= scribes the degreee of contact. A first gradient theory (i.e. the free ener= gy depends on grad 3) and a pseudo-potential of dissipation give the consti= tutive laws. The equations show that, during the the separation process, far from the separation line the contact is bilateral, in the vicinity

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,Ioffe’s Fans and Unilateral Problems: A New Conjecture,hen a new type of superpotentials, the F-superpotentials, is proposed by using the notion of “fans” introduced recently by Ioffe. Then a conjecture is made which permits, first, the formulation of general variational principles in inequality form for systems with or without dissipation, and secondly

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Convex Problems in Structural Mechanics,tress-strain) and the external (displacement-reaction) fields are governed by general convex (non differentiable) potentials. The analysis is developed in the formal framework of Convex Analysis and is based on the Fenchel duality theory. Admissibility conditions on the data and their variational fo

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Conference proceedings 1987ives an updated account of the state-of-the-art in the field of unilateral problems, with an outlook on open problems and on perspectives of application to structural analysis. The topic is presently the object of growing interest and is undergoing very rapid development. One of the most noticeable

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