14 janvier 2011 de 16 h 00 à 18 h 00 (heure de Montréal/HNE) Sur place
The basic principles of brittle fracture are viewed as non-negotiable by most mechanicians. Yet, the theory, for all its achievements, has failed in various ways and it is hard-pressed when attempting any kind of prediction of the crack path in response to a loading process. Fracture has recently been revisited in a variational light. I will describe that viewpoint and discuss its impact on crack initiation, notably in the presence of cohesive forces, as well as on crack path prediction, this time in a pure Griffith framework. I will conclude the talk with an illustration of the computational power of the variational approach through examples of 2d and 3d computations under ``thermal" loading; those are courtesy of Blaise Bourdin at LSU.
AdresseUQAM, Pav. Sherbrooke, 200, rue Sherbrooke O., salle SH-3420