This paper presents a simple method for calculating the stress intensity factors for cracks emanating from a notch under arbitrary loading. A range of examples have been presented to demonstrate the accuracy of the present method. This finding has the potential to be used in conjunction with the finite element alternating technique for the analysis of small to medium length cracks. Existing formulations use the solution for an embedded flaw. Consequently, when using the finite element alternating technique to analyse cracks at notches we find that if the crack is small we need to have a fine mesh around the notch. This requirement is necessary to ensure that the boundary conditions are satisfied at the notch. However, if we adopt the present approximation it may be possible to relax this requirement and thereby further increase the computational attractiveness of this technique. It also has the potential to be used for problems associated with fatigue life extension and shape optimisation. To this end we have used the present approximation to develop an approximate solution for an edge crack at a hole repaired with a bonded composite repair.
A simple method for computing the stress intensity factors for cracks at notches
Eine einfache Methode zur Berechnung des Spannungsintensitätsfaktors für Risse und Kerben
Engineering Failure Analysis ; 9 , 6 ; 683-702
2002
20 Seiten, 20 Bilder, 3 Tabellen, 31 Quellen
Article (Journal)
English
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