HAL Id: hal-01504286
https://hal.archives-ouvertes.fr/hal-01504286
Submitted on 9 Apr 2017
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Simulation numérique de la déchirure ductile par la méthode des éléments de frontière
Gaëtan Hello, Hocine Kebir, Laurent Chambon, Alain Rassineux, Jean-Marc Roelandt
To cite this version:
Gaëtan Hello, Hocine Kebir, Laurent Chambon, Alain Rassineux, Jean-Marc Roelandt. Simulation numérique de la déchirure ductile par la méthode des éléments de frontière. 8e Colloque national en calcul des structures, CSMA, May 2007, Giens, France. �hal-01504286�
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(*) Laboratoire Roberval
Univerité de Technologie de Compiègne BP 20529 – 60205 COMPIEGNE CEDEX gaetan.hello@utc.fr – hocine.kebir@utc.fr
alain.rassineux@utc.fr – jean-marc.roelandt@utc.fr (**) EADS IW
18 rue Marius Terce BP 13050 – 31025 TOULOUSE CEDEX 3 laurent.chambon@eads.net
RÉSUME :
La méthode des éléments de frontière est utilisée pour simuler numériquement le phénomène de déchirure ductile intervenant dans les structures minces fissurées. La résolution des problèmes mécaniques dans les milieux fissurés à comportement élastoplastique se base sur la formulation intégrale duale du problème. Cette méthode permettant de décrire avec précision les champs mécaniques en fond de fissure, le critère de rupture ductile de Rice et Tracey peut être employé en post-traitement du calcul. La validité du modèle numérique est testée en comparant ses résultats à ceux obtenus expérimentalement sur une éprouvette CCT.
ABSTRACT :
This work aims at simulating the ductile fracture phenomenon occuring in thin cracked structures thanks to the boundary element method. A process based on the dual integral formulation of the problem has been developed so as to solve elastoplastic cracked problems.
Since this method provides accurate mechanical fields at the crack tip, the Rice and Tracey criterion for ductile fracture can be evaluated during the post-processing step. The validity of the method is at last addressed with the comparison between numerical and experimental results for a test on a CCT specimen.
MOTS-CLÉS :
méthode des éléments de frontière (BEM), mécanique non-linéaire de la rupture, approche locale de la rupture ductile, courbe-R.
KEYWORDS:
boundary element method (BEM), non-linear fracture mechanics, local approach of ductile fracture, R-curve.
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