STP601

    Ductile Fracture of Cylindrical Vessels Containing a Large Flaw

    Published: Jan 1976


      Format Pages Price  
    PDF Version (232K) 18 $25   ADD TO CART
    Complete Source PDF (8.8M) 18 $177   ADD TO CART


    Abstract

    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.

    Keywords:

    fractures (materials), pressure vessels, cylindrical shells, plastic deformation, crack propagation, surface defects, failure


    Author Information:

    Erdogan, F
    Professor of mechanics, Lehigh University, Bethlehem, Pa.

    Irwin, GR
    Professor of mechanics, Lehigh UniversityUniversity of Maryland, BethlehemCollege Park, Pa.Md.

    Ratwani, M
    Research engineer, Northrop Corporation, Hawthorne, Calif.


    Paper ID: STP28645S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP28645S


    CrossRef ASTM International is a member of CrossRef.