STP743: Stress-Intensity Factors for Complete Circumferential Interior Surface Cracks in Hollow Cylinders

    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.

    Pages: 12    Published: Jan 1981


    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


    Paper ID: STP28808S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP28808S


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