[Amorçage d'une fissure en pointe d'entaille en V—comparaison entre un critère de rupture fragile et le modèle de zone cohésive de Dugdale]
Les modèles de zone cohésive constituent une alternative aux critères d'amorçage de fissures aux points de concentration de contraintes dans les matériaux fragiles. On se propose ici de comparer le critère dit « mixte », basé sur une double condition en énergie et en contrainte, et le modèle de zone cohésive de Dugdale. Les prédictions de la charge critique d'amorçage coïncident parfaitement, et les deux modèles concluent à l'instabilité du processus d'amorçage sauf dans le cas d'une fissure pré-existante.
The cohesive zone models are an alternative to fracture criteria for the prediction of crack initiation at stress concentration points in brittle materials. We propose here a comparison between the so-called mixed criterion involving a twofold condition (energy and stress) and the Dugdale cohesive model. The predictions of the critical load leading to failure are in perfect agreement and both models conclude that the initial process is unstable except in case of a pre-existing crack.
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Mot clés : Rupture, Élasticité, Matériaux fragiles, Zone cohésive
Carole Henninger 1 ; Dominique Leguillon 1 ; Eric Martin 2
@article{CRMECA_2007__335_7_388_0, author = {Carole Henninger and Dominique Leguillon and Eric Martin}, title = {Crack initiation at a {V-notch{\textemdash}comparison} between a brittle fracture criterion and the {Dugdale} cohesive model}, journal = {Comptes Rendus. M\'ecanique}, pages = {388--393}, publisher = {Elsevier}, volume = {335}, number = {7}, year = {2007}, doi = {10.1016/j.crme.2007.05.018}, language = {en}, }
TY - JOUR AU - Carole Henninger AU - Dominique Leguillon AU - Eric Martin TI - Crack initiation at a V-notch—comparison between a brittle fracture criterion and the Dugdale cohesive model JO - Comptes Rendus. Mécanique PY - 2007 SP - 388 EP - 393 VL - 335 IS - 7 PB - Elsevier DO - 10.1016/j.crme.2007.05.018 LA - en ID - CRMECA_2007__335_7_388_0 ER -
%0 Journal Article %A Carole Henninger %A Dominique Leguillon %A Eric Martin %T Crack initiation at a V-notch—comparison between a brittle fracture criterion and the Dugdale cohesive model %J Comptes Rendus. Mécanique %D 2007 %P 388-393 %V 335 %N 7 %I Elsevier %R 10.1016/j.crme.2007.05.018 %G en %F CRMECA_2007__335_7_388_0
Carole Henninger; Dominique Leguillon; Eric Martin. Crack initiation at a V-notch—comparison between a brittle fracture criterion and the Dugdale cohesive model. Comptes Rendus. Mécanique, Volume 335 (2007) no. 7, pp. 388-393. doi : 10.1016/j.crme.2007.05.018. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2007.05.018/
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