Non local damage models with evolving internal length: motivations and applications to coupled problems

Gilles Pijaudier-Cabot (1) , Khalil Haidar (1) , Mirvat Omar (1) , Ahmed Loukili (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique

In most existing proposals, the internal length in non local damage models is a constant parameter. Still, there are some theoretical indications that suggest that the internal length should change in the course of the fracture process. The aim of this contribution is firstly to examine the correlation between the width of the fracture process zone observed with acoustic emission and the internal length, and secondly to consolidate these experimental observations in a modified non local damage model with evolving internal length. Extensions of this model to ageing resulting from an increase of material porosity, to creep-damage interaction, and to hydro-mechanical effects are discussed in the closure.

Mots clés: non local damage; internal length; coupled problems

Domaines: Mécanique [physics.med-ph]; Matériaux

Gilles Pijaudier-Cabot, Khalil Haidar, Mirvat Omar, Ahmed Loukili. Non local damage models with evolving internal length: motivations and applications to coupled problems. Fifth International Conference on Fracture Mechanics of Concrete and Concrete Structures, 2004, Vail, Colorado, United States. ⟨hal-01008528⟩