Accession Number : AD0713519

Title :   THE ROLE OF FRACTURE TOUGHNESS AND RESIDUAL STRESSES IN THE FATIGUE AND FRACTURE BEHAVIOR OF LARGE THICK-WALLED PRESSURE VESSELS,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Davidson,Thomas E. ; Throop,Joseph F. ; Reiner,Albert N.

Report Date : 1970

Pagination or Media Count : 15

Abstract : Summarized are the results of an investigation into the fatigue and fracture behavior of large thick-walled cylinders identical in configuration to a 175mm cannon tube. Crack growth rates and fatigue life data are presented for materials of three strength levels and different fracture toughness levels. The effects of autofrettage were examined and found to improve the fatigue life significantly. This improvement in life is shown to be the result of retardation of the fatigue crack growth rate at small crack depths. This observation, along with the relationship between fracture toughness, critical crack depth and fracture mode, is interpreted in terms of recent advancements in the application of fracture mechanics to the case of a cylinder under internal pressure. (Author)

Descriptors :   (*GUN BARRELS, FRACTURE(MECHANICS)), PRESSURE VESSELS, STRESSES, FATIGUE(MECHANICS), CRACKS, CRACK PROPAGATION, PRESSURE, HYDRAULIC EQUIPMENT, TEST METHODS

Subject Categories : Guns
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE