## Abetnet-Two methods are used to obtain post yield solutions for symmetric cracks emanating from elliptic holes. In the first a dislocation model is used to simulate the cracks and plastic zones. This method is exact within the numerical accuracies of the computations. In the second approximate
Fracture Mechanics of cracks originating from holes treated for notch stress relieving
โ Scribed by Dr. C. Mattheck; Mrs. S. Burkhardt
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 533 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0933-5137
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โฆ Synopsis
A tensile plate with a circular hole is investigated. The notch stresses are calculated, for an optimum notch arrangement as well as cold expansion of the notch. The stress-intensity factor is calculated for a crack originating at a single circular hole surrounded by two axially arranged circular stress-relieving notches. Furthermore, the influence of cold expansion of the main notch, which is to be relieved, and of the combination of cold expansion and stress-relieving notches on the stress intensity factor is investigated. The weight-function is given for all the cases above. It has been computed with good approximation by a Finite-Element-Method.
Beschreibung von Rissen, die von Kreislbchern mit redurierter Kerbspannung auslaufen
Eine Platte mit mittigem Kreisloch, die auf Zug belastet wird, soll untersucht werden. Die Kerbspannungen werden fur eine optimale Anordnung der Entlastungskerben relativ zur Hauptkerbe sowie nach Kaltaufweitung der Hauptkerbe berechnet . Der Spannungsintensitatsfaktor wird fur einen RiR ausgehend von einem einzelnen Kreisloch umgeben von 2 kreisrunden Entlastungskerben, die in axialer Richtung angebracht sind, berechnet. Nmm-2.
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