Stress Intensity Factor for Cracks in Pressure Vessels with Optimum Cracks Number
The cracks in pressure vessels (e.g.thick wall cylinders) subjected to high internal pressure and thermal shocks are always radial, they are semi-elliptical in form and their number varies along the length of the cylinder. These cracks are often called star cracks or crazy cracks. Modelling of such a crack configuration is still a serious problem, as the actual number of cracks is not known. The paper presents a stress intensity factor solution as a function of crack length, number of cracks in the star and wall thickness simultaneously with a procedure how to determine the optimum number of cracks.
KeywordsFracture Toughness Stress Intensity Factor Pressure Vessel Finite Element Solution Full Scale Test
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