Abstract
The propagation process of an interfacial crack in composite material is studied using the modified maximum dilatational strain energy density criterion, NT-criterion. Some necessary assumptions have been adopted to facilitate the use of the NT-criterion in this case. The stress intensity factors at the crack tip are extracted from the complex displacement field and finite element results. A simple algorithm for automatic crack propagation is presented with an illustrative example.
Résumé
On étudie le processus de propagation d'une fissure d'interface dans un matériau composite en utilisant le critère NT, version modifiée du critère de densité d'énergie maximale de dilatation. On a adopté diverses hypothèses pour faciliter l'application du critère NT à ce cas. Les facteurs d'intensité de contraintes à l'extrémité de la fissure sont déduits du champ de déplacement complexe et des résultats de l'analyse par éléments finis. Un algorithme simple relatif à une propagation automatique de la fissure est présenté avec un exemple à la clé.
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Yehia, N.A.B., Shephard, M.S. Automatic crack growth tracking of bimaterial interface cracks. Int J Fract 37, 123–135 (1988). https://doi.org/10.1007/BF00041715
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DOI: https://doi.org/10.1007/BF00041715