Accession Number : AD0747783

Title :   Effects of Local Strength Variations on Plastic Enclave Development at Crack Tips,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING MECHANICS

Personal Author(s) : Kahl,Michael R. ; Reifsnider,Kenneth L.

Report Date : 21 JUN 1972

Pagination or Media Count : 76

Abstract : Existing literature dealing with plastic zones near crack tips idealizes materials in the various analyses to have constant and uniform yield strength throughout the region under investigation, at least initially. Such an assumption is not easily defended if one is to consider cracks in real engineering components which may have been forged, cold worked, annealed, or cast during manufacture. This paper establishes analytically and experimentally the influence of one-dimensional yield strength gradients on the size and shape of plastic zones in single edge notched 7075-T6 aluminum specimens. (Author-PL)

Descriptors :   (*ALUMINUM ALLOYS, MECHANICAL PROPERTIES), (*FRACTURE(MECHANICS), NUMERICAL ANALYSIS), STRESSES, CRACKS, PLASTIC PROPERTIES

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE