SYMPOSIA PAPER Published: 01 January 1979
STP35040S

Surface Crack -Estimates and Fatigue Life Calculations in Cannon Tubes

Source

K solutions for internal surface cracks in pressurized cylinders are compared, including Smith's photoelastic results, Hussain's collocation and compliance results, and Underwood's estimates. Fatigue crack growth observations from cannon tubes are described, particularly in relation to surface crack growth and multiple cracks.

A method is proposed for describing quantitatively the effect of residual stress on K in cylinders with shallow cracks. The combination of compressive residual stress with applied stress reduces ΔK and thus increases fatigue life.

Author Information

Underwood, JH
U.S. Army Armament Research and Development Command, Benet Weapons Laboratory, LCWSL, Watervliet, N.Y.
Throop, JF
U.S. Army Armament Research and Development Command, Benet Weapons Laboratory, LCWSL, Watervliet, N.Y.
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Details
Developed by Committee: E08
Pages: 195–210
DOI: 10.1520/STP35040S
ISBN-EB: 978-0-8031-4754-6
ISBN-13: 978-0-8031-0532-4