Creep-damage coupling

Frédéric Dufour (1) , Gilles Pijaudier-Cabot (1) , Theocharis Baxevanis (2) , Rani Desiassyifayanty (3) , Mirvat Omar (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique
2 UOC - University of Crete [Heraklion]
3 UI - University of Indonesia

The failure of quasi-brittle materials under mechanical loading can be divided into two different parts. Initially, diffuse microcracking (damage) occurs in the Fracture Process Zone (FPZ) due to heterogeneities at the micro-scale. Further on micro-cracks coalesce into a macro one yielding strain localization. As the size of the FPZ is related to the microstructure, this type of fracture yields a size effect extensively studied by Bazant since the 70’s [1]. For prestressed concrete structures for which permanent load level is large, the influence of creep on the fracture process should be taken into account. We tackled the coupling between creep and failure properties from experimental, analytical and numerical point of view keeping in mind the perspective of size effect. Therefore, several analyses have been performed on three point bending tests on a notched beam of three homothetic sizes.

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

Frédéric Dufour, Gilles Pijaudier-Cabot, Theocharis Baxevanis, Rani Desiassyifayanty, Mirvat Omar. Creep-damage coupling. 15th US National Congress on Theoretical and Applied Mechanics, 2006, Boulder, United States. ⟨hal-01008046⟩