Ductile Fracture of Circumferentially Cracked Type-304 Stainless Steel Pipes in Tension

[+] Author and Article Information
A. Zahoor

Impell Corporation, Bethesda, Md. 20814

D. M. Norris

Electric Power Research Institute, Palo Alto, Calif. 94303

J. Pressure Vessel Technol 106(4), 399-404 (Nov 01, 1984) (6 pages) doi:10.1115/1.3264370 History: Received September 09, 1983; Revised July 31, 1984; Online November 05, 2009


Circumferentially cracked pipes subjected to tensile load were analyzed for finite length and constant depth part-through cracks located at the inside of the pipe wall. The analysis postulated loads sufficient to cause net-section yielding of the flawed section. It was demonstrated that a propensity for predominantly radial growth exists for part-through cracks loaded in tension. This result is similar to the result for bend loading, except that bend loading causes more favorable conditions for wall breakthrough than tension loading. Numerical results were developed for 4-in. and 24-in-dia pipes. Safety margins for displacement controlled loads were described by a safety assessment diagram. This diagram defines a curve delineating leak from fracture in a space of nondimensional crack length and crack depth. 4-in-dia schedule 80 Type-304 stainless steel pipes with length to radius ratio (L /R ) of up to 100 exhibited leak-before-break behavior.

Copyright © 1984 by ASME
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