SYMPOSIA PAPER Published: 01 January 1976
STP28645S

Ductile Fracture of Cylindrical Vessels Containing a Large Flaw

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The fracture process in pressurized cylindrical vessels containing a relatively large flaw is considered. The flaw is assumed to be a part-through or through meridional crack. The flaw geometry, the yield behavior of the material, and the internal pressure are assumed to be such that in the neighborhood of the flaw the cylinder wall undergoes large-scale plastic deformations. Thus, the problem falls outside the range of applicability of conventional brittle fracture theories. To study the problem, plasticity considerations are introduced into the shell theory through the assumptions of fully-yielded net ligaments using a plastic strip model. Then a ductile fracture criterion is developed which is based on the concept of net ligament plastic instability. A limited verification is attempted by comparing the theoretical predictions with some existing experimental results.

Author Information

Erdogan, F
Lehigh University, Bethlehem, Pa.
Irwin, GR
University of Maryland, College Park, Md.
Ratwani, M
Northrop Corporation, Hawthorne, Calif.
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Details
Developed by Committee: E08
Pages: 191–208
DOI: 10.1520/STP28645S
ISBN-EB: 978-0-8031-4676-1
ISBN-13: 978-0-8031-0318-4