Laboratoire des Fluides Complexes, Universite de Pau et des Pays de l’Adour, Anglet, France ´ ´ ´ Frederic Dufour Boundaryeffects in non local damage model Laboratoire 3S-R, Institut National Polytechnique de Grenoble, Grenoble, France AbbasKrayani R&DO,Institutde Recherche en Genie Civil…
Laboratoire des Fluides Complexes, Universite de Pau et des Pays de l’Adour, Anglet, France ´ ´ ´ Frederic Dufour Boundaryeffects in non local damage model Laboratoire 3S-R, Institut National Polytechnique de Grenoble, Grenoble, France AbbasKrayani R&DO,Institutde Recherche en Genie Civil et Mecanique, Ecole Centrale de Nantes, Nantes, France Gilles Pijaudier-Cabot ´ ´ Laboratoire des Fluides Complexes, Universite de Pau et des Pays de l’Adour, Anglet, France ´ ´ ´ Frederic Dufour Laboratoire 3S-R, Institut National Polytechnique de Grenoble, Grenoble, France AbbasKrayani R&DO,Institutde Recherche en Genie Civil et Mecanique, Ecole Centrale de Nantes, Nantes, France ´ ´ Interaction stresses that are at the origin of non locality are expected to vanish at the boundary of a solid, in the normal direction to this boundary. Existing models do not account for such an effect. We introduce tentative modifications of the classical non local damage model aimed at accounting for this boundary layer effect in a continuummodellingsetting. Finiteelement simulationsofsizeeffect on notchedand unnotchedspecimensare performed. Forthesamesetofmodelparameters,includingtheinternallength,thefractureenergyderivedfrom the size effect test method is quite different according to both approaches. Parameters in the size effect laws for notched and unnotched specimens, obtained from computation of geometrically similar bending beams, are moreconsistent with the modified non local model compared to the original non local formulation.