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    Stress Intensity Factors for Internally Pressurized Thick-Wall Cylinders

    Published: Jan 1972

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    Selected stress intensity factor solutions from the literature are related to the problem of internally pressurized thick-wall cylinders with straight-front and curved-front cracks. The recent K solutions of Bowie and Freese and Rice and Levy are combined in an estimate of the K solution for a pressurized cylinder with a semielliptical crack originating along the inner wall. The estimate of K is compared with the available experimental and analytical K data for shallow cracks.

    The estimated K solution is modified to account for various complex loadings in pressurized cylinders. Included are modifications to describe (1) lack of pressure on the crack surfaces in pressurized cylinders, (2) residual stress in the wall of pressurized cylinders, and (3) a combination of an unpressurized crack and residual stress in the wall. The effect of cyclic pressure loading on K is also discussed in relation to Throop's work on fatigue of pressurized cylinders.


    stresses, cracks, loads (forces), tensile properties, pressure, pressure vessels, cylinders, residual stress, geometries

    Author Information:

    Underwood, JH
    Benet Weapons Laboratory, Watervliet, N.Y.

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP34113S

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