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Ductile fracture of cylindrical vessels containing a large flawThe 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.
Document ID
19770041635
Document Type
Conference Proceedings
Authors
Erdogan, F. (Lehigh University Bethlehem, Pa., United States)
Irwin, G. R. (Lehigh University Bethlehem, Pa.; Maryland, University, College Park, Md., United States)
Ratwani, M. (Northrop Corp. Hawthorne, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
STRUCTURAL MECHANICS
Meeting Information
National Symposium on Fracture Mechanics(Pittsburgh, PA)
Funding Number(s)
CONTRACT_GRANT: NGR-39-007-011
Distribution Limits
Public
Copyright
Other