Abstract
A number of crack propagation experiments are performed on sheets of a high strength steel. Momentaneous forces, crack lengths and velocities are measured. With this as input the dynamic stress-intensity factor is calculated with aid of a FEM program especially modified for the purpose. Observations regarding the dependence of crack propagation toughness on crack tip velocity and acceleration are made. A simple statistical analysis of the results is performed.
Résumé
On a procédé à un grand nombre d'essais de propagation de fissures sur des feuillards en acier à haute résistance. Les forces instantanées, les longueurs de fissure, et les vitesses de fissuration ont été mesurées. Avec ces données, on a calculé le facteur d'intensité de contrainte à l'aide d'un programme à éléments finis spécialement adapté à cette fin. On a procédé à diverses observations sur la maniére dont la ténacité vis-à-vis de la propagation de fissure dépend de la vitesse de l'extrémité de la fissure et de son accélération. Une analyse simple statistique des résultats a été effectuée.
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Brickstad, B., Nilsson, F. Numerical evaluation by FEM of crack propagation experiments. Int J Fract 16, 71–84 (1980). https://doi.org/10.1007/BF00042386
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DOI: https://doi.org/10.1007/BF00042386