Accession Number : AD0717301

Title :   Fatigue Crack Tolerance in Thick Walled Cylinders.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Throop,Joseph F.

Report Date : NOV 1970

Pagination or Media Count : 49

Abstract : A K-calibration for part-through wall cracks of semi-elliptical shape in a pressurized thick walled cylinder is obtained in two parts which include the stress gradient in the tube wall and the effect of the pressure acting within the crack cavity. Using K in a limiting condition, the calibration provides a failure criterion for estimation of critical crack depths for brittle fracture. The dispersion in crack tolerance may be estimated from the distribution in tempering temperatures among the forgings. This employs the relationships of the mechanical properties to tempering temperature. (Author)

Descriptors :   (*CYLINDRICAL BODIES, FATIGUE(MECHANICS)), (*PRESSURE VESSELS, FATIGUE(MECHANICS)), (*CRACKS, TOLERANCES(MECHANICS)), STRESSES, BENDING, FRACTOGRAPHY, CALIBRATION, TOUGHNESS, PRESSURIZATION, LOADS(FORCES), MATHEMATICAL MODELS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE