Abstract
Kanninen's beam model for the DCB specimen is used to analyze several fast fracture problems. First, the model is studied under two loading conditions to which it has not been applied previously: constant-force (dead) loading and rapid-wedge (constant velocity) loading. The predictions of crack propagation under both of these loading conditions are similar to those obtained by Bilek and Burns. Second, the implications of using different methods of simulating the bluntness of a starter-notch are investigated for conditions typical of Kanninen's analyses and experiments conducted at the Battelle Laboratories. The predictions of crack behavior are in general agreement with Kanninen's results; however, it appears that quantitative predictions are sensitive to the specific manner in which the bluntness is simulated in the analytical model.
Résumé
Le modèle en poutre de Kanninen pour les éprouvettes double Cantilever est utilisé en vue d'analyser plusieurs problèmes de rupture rapide. En premier lieu, le modèle est étudié sous 2 conditions de charge pour lesquelles il n'avait pas été appliqué précédemment: la charge constante (point mort) et le chargement rapide de côté (à vitesse constante). Les prédictions de propagation de fissure sous ces 2 conditions de charge sont similaires à celles obtenues par Bilek et Burns. En deuxième lieu, les implications de l'utilisation de différentes méthodes pour simuler l'arrondissement d'une entaille initiale sont étudiées pour des conditions typiques des analyses de Kanninen et des expériences conduites aux Laboratoires du Battelle. Les prédictions du comportement de la fissure sont en général en accord avec les résultats de Kanninen. Toutefois, il apparait que les prédictions quantitatives sont sensibles à la manière spécifique suivant laquelle l'arrondissement est simulé dans le modèle analytique.
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Malluck, J.F., King, W.W. Simulations of fast fracture in the DCB specimen using Kanninen's model. Int J Fract 13, 655–665 (1977). https://doi.org/10.1007/BF00017298
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DOI: https://doi.org/10.1007/BF00017298