The aim of this paper is to present an algorithm of topology preserving mesh adaptation. It is based on a node movement rather than on mesh classical refinement/coarsening techniques. The choice of this so-called r-adaptation strategy is motivated at least by two reasons: node movement techniques preserve the matrix structure and are then well suited for large-scale computations, e.g. three-dim...

Nonsmooth analysis, inequality constrained optimization and variational inequalities are involved in the modelling of unilateral contact problems. The corresponding theoretical and algorithmic tools, which are part of the area known as nonsmooth mechanics, are by no means classical. In general purpose software some of these tools (perhaps in a simplified way) are currently available. Two engine...

The contact between two membranes can be described by a system of variational inequalities, where the unknowns are the displacements of the membranes and the action of a membrane on the other one. We first perform the analysis of this system. We then propose a discretization, where the displacements are approximated by standard finite elements and the action by a local postprocessing which admi...

Boundary contact problems of statics of the moment (couplestress) theory of elasticity are studied in the case of a unilateral contact of two elastic anisotropic nonhomogeneous media. A problem, in which during deformation the contact zone lies within the boundaries of some domain, and a problem, in which the contact zone can extend, are given a separate treatment. Concrete problems suitable fo...

Servicio de Dermatología, Hospital General Universitario de Valencia, Spain in 2004 and 2005.6 The highest number of positive reactions was seen with ketoprofen (45 cases). Promethazine occupied sixth place with 7 cases, although in none of them were the reactions considered relevant. In our experience, of the 48 photopatch tests done in the Dermatology Department of Hospital 12 de Octubre in M...