STP743

    Stress-Intensity Factors for Complete Circumferential Interior Surface Cracks in Hollow Cylinders

    Published: Jan 1981


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    Abstract

    An approximate expression is developed for the stress-intensity factor due to concentrated point loads applied to the surfaces of a complete circumferential interior surface crack in a hollow circular cylinder. This expression is derived from existing results for a point load on an embedded penny-shaped crack and a concentrated “ring” load on a complete circumferential interior surface crack in a hollow cylinder. Results for a particular loading case were obtained using the approximate solution and comparing with three-dimensional results obtained using boundary integral equation techniques. Since the agreement was good, it is concluded that the approximate expression provides a sufficiently accurate means of estimating K for an arbitrary loading on an interior complete circumferential surface crack. Results for bending of a cracked cylinder are then presented as an example of the use of the approximate K solution. Convenient curve fits of relevant results are included in the Appendix.

    Keywords:

    stress-intensity factor, cylinder, point load, boundary integral equation method


    Author Information:

    Harris, DO
    Division managers, Science Applications, Inc., San Jose and Palo Alto, Calif.

    Lim, EY
    Division managers, Science Applications, Inc., San Jose and Palo Alto, Calif.


    Paper ID: STP28808S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP28808S


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