The behaviour of part-through cracks, modelled by semi-elliptical surface cracks, under variable normal stresses (linearized) is investigated. The stable crack contour, given as crack aspect ratio, is determined for an infinite body as a circle; in a finite body semi-ellipses are "quasi"-stable. The effects of crack growth law types, crack location, geometry and stress redistribution together with plasticity effects are discussed. The final relative crack lengths for wall penetration are determined. The data are discussed with respect to the conditions for leak-beforebreak, sudden rupture and no-leak-before-breakho-sudden-rupture.
Stabiles RiOwachstum -Charakterisierung des Verhaltens nichtwanddurchdringender RisseDas Verhalten von nicht-wanddurchdringenden Fehlern, die durch halb-elliptische Oberflachenfehler dargestellt werden, unter beliebiger Normalspannungsverteilung (linearisiert) wird untersucht. Einflusse des Fehlerwachstumsgesetzes, der Fehlerlage, der Geometrie und der Spannungsumlagerungen zusammen rnit Plastizitatseffekten werden diskutiert . Die relative Endfehlerlange fur den Wanddurchbruch wird bestimmt. Die Ergebnisse werden erortert im Zusammenhang rnit den Bedingungen fur Leck-vor-Bruch, promptes-Versagen und kein-Leck-vor-Bruch/kein-promptes Versagen.
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