Accession Number : AD0721626

Title :   A New Fracture Toughness Test Method for Thick-Walled Cylinder Material.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Kendall,David P. ; Hussain,Moayyed A.

Report Date : APR 1971

Pagination or Media Count : 31

Abstract : A new method for measuring the plane strain fracture toughness of the material from a thick-walled cylinder is presented. This method utilizes a notched, 'C' shaped test specimen, pin loaded in tension. This specimen has the advantage of most efficiently utilizing the available material to obtain the maximum possible triaxial constraint at the crack tip. Stress intensity factor calibrations for this specimen were obtained by two independent experiments. These are a compliance test as originally proposed by Irwin and a fatigue crack growth test as suggested by James and Anderson. Very good agreement was obtained between the results of these two experiments. A stress intensity calibration for a similar geometry was also obtained using a finite element analysis and a method developed by Kobayashi to determine stress intensity factors from finite element results. The results of this method appear to be low by about 10 percent. (Author)

Descriptors :   (*FRACTURE(MECHANICS), *TEST METHODS), (*GUN BARRELS, STEEL), NOTCH TOUGHNESS, STRESSES, NUMERICAL ANALYSIS, MECHANICAL PROPERTIES, CRACK PROPAGATION, CYLINDRICAL BODIES

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE