How to extract a crack opening from a continuous damage finite-element computation? - Archive ouverte HAL
Communication Dans Un Congrès Année : 2007

How to extract a crack opening from a continuous damage finite-element computation?

Résumé

Doubtlessly, for assessing the integrity and the strength of concrete structures to environmental attacks it would be ideal to model the transition between diffuse damage and a discontinuous description. We propose, in a first approach, to extract an equivalent crack opening using a non local Mazars’ damage model. We consider a discontinuous displacement field with a given jump [U] from which we compute the equivalent non local strain ε([U]) governing the damage variable in Mazars’ model. Besides, from a classical FE computation, we obtain a distribution of the state variable ε FE with the same shape due to the non local weight function. Finally the displacement jump is computed by setting ε([U]) = εFE at the discontinuity. The proposed approach is applied on a tension rod with an error measure between both solutions to evaluate how the non local solution approaches asymptotically the representation of a discontinuity. Results show good agreement for large damage.
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hal-04703248 , version 1 (19-09-2024)

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  • HAL Id : hal-04703248 , version 1

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Frédéric Dufour, Gilles Pijaudier-Cabot, Marta Choinska, Antonio Huerta. How to extract a crack opening from a continuous damage finite-element computation?. International Conference on Computational Fracture and Failure of materials and Structures, Jun 2007, Nantes, France. pp.1-8. ⟨hal-04703248⟩
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