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Stress intensity factor of nozzle corner cracks

✍ Scribed by Qichao Hong; Guozhong Chai

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
398 KB
Volume
36
Category
Article
ISSN
0013-7944

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✦ Synopsis

In this paper, a formula for the stress intensity factor (SIF) of a nozzle comer l/4 circular crack in a P.V. nozzle along the longitudinal section of the cylinder is proposed and verified with the fatigue experimental results of 30 nozzle comer cracks from nine pieces of plate-nozzle models and three pressure vessels. The maximum difference between the K, value calculated with the proposed formula and the experimental results is less than 15%.

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In the present paper a formula for the stress intensity factor (SF) of a nozzle comer l/4 circular crack in a P.V. nozzle along the longitudinal section of a cylinder is proposed and verified with the fatigue experimental results of 30-nozzle corner cracks from nine-piece plate-nozzle models and thr

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## A~~ct-Applying Smith's solution for a semi-circular flaw, an approximate expression is derived for a corner flaw emanating from an edge of a quarter infinite solid. The maximum stress intensity factor on the periphery of the flaw is found to be K = ~420. The same expression can be obtained if a