Accession Number : AD0761102

Title :   K Calibration for 'C' Shaped Fracture Toughness Specimens of Various Geometries.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Underwood,J. H. ; Scanlon,R. D. ; Kendall,D. P.

Report Date : APR 1973

Pagination or Media Count : 25

Abstract : Prior collocation results are combined with new collocation data and analyzed using two parameter data approximation methods and fracture mechanics methods. A general K calibration is obtained for 'C' shaped specimens which have outer to inner radius ratios, W = r sub 2/r sub 1, between 1.4 and 2.5. The K calibration for 'C' shaped specimens is found to depend on the load eccentricity to specimen thickness ratio, x/t, as well as the usual crack depth to specimen thickness ratio, a/t. The K results are presented as tabular and plotted values from a cubic spline surface used to approximate the collocation data and as a polynomial approximation of the collocation data over a more limited range of x/t. (Modified author abstract)

Descriptors :   (*CURVED PROFILES, *FRACTURE(MECHANICS)), LOADS(FORCES), CRACKS, CRACK PROPAGATION, SHEAR STRESSES, NOTCH TOUGHNESS, CALIBRATION, APPROXIMATION(MATHEMATICS)

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE