Abstract
A method for the determination of the stress intensity factors of a cracked body using a conic-section-simulation model of the crack surface is presented. Stress distribution around the crack is determined using a finite element code having the elastic crack tip singularity 1/√r. This method improves the accuracy of the stress intensity factor values and is simple enough to be used with most standard isoparametric finite element programs. The method also eliminates the necessity of extrapolation to estimate the stress intensity factors at the crack tip.
Résumé
On présente une méthode pour déterminer les facteurs d'intensité de contrainte d'un corps fissuré en utilisant un modèle de simulation à section conique de la surface de la fissure. La distribution des contraintes aux alentours de la fissure est déterminée en utilisant un code d'eléments finis possédant un singularité de l'extrémité élastique de la fissure 1/√r. Cette méthode améliore la précision des valeurs de facteur d'intensité de contrainte et est suffisamment simple pour être utilisée dans la plupart des programmes d'élément fini standard isoparamétrique. La méthode élimine également la nécessité d'extrapoler à des valeurs estimées des facteurs d'intensité de contrainte aux extrémités de la fissure.
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Woo, C.W., Kuruppu, M.D. Use of finite element method for determining stress intensity factors with a conic-section simulation model of crack surface. Int J Fract 20, 163–178 (1982). https://doi.org/10.1007/BF01140333
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DOI: https://doi.org/10.1007/BF01140333