SEDL / STP / STP1131-EB / STP23695S

Stress-Intensity Factors for Long Axial Outer Surface Cracks in Large R/t Pipes

Stonesifer, RB
President, Computational Mechanics, Inc., Julian, PA

Brust, FW
Senior research scientist and research leader, Battelle Memorial Institute, Columbus, OH

Leis, BN
Senior research scientist and research leader, Battelle Memorial Institute, Columbus, OH

Pages: 17    Published: Jan 1992

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Abstract

Stress-intensity factors for axial surface flaws in pipes can be sensitive to the radius to thickness ratio (R/t) of the pipe depending on the depth to thickness (a/t) and the depth to length (a/c) ratios of the crack. This study combines solutions from the literature for plates and smaller R/t pipes with several new solutions for axial outer surface (OD) cracks in R/t = 40 pipes to obtain stress-intensity factors for a/t = 0.25, 0.50, and 0.75, and a/c in the range 0 to 1. The new solutions are obtained using the finite element alternating method.