Accession Number : AD0620161

Title :   PLASTIC STRAINS AND ENERGY DENSITY IN CRACKED PLATES. PART II. COMPARISON WITH ELASTIC THEORY,

Corporate Author : JET PROPULSION LAB PASADENA CALIF

Personal Author(s) : Swedlow, J. L. ; Gerberich,W. W.

Report Date : 1964

Pagination or Media Count : 34

Abstract : Data from the ductile materials reported in Part I are compared to planar elastic results. The experimental and theoretical strains are markedly different, both in angular distribution and in decay with distance from the crack tip. The distortional energy density data also differ with theory, in terms of angular distribution, but their radial behavior is closer to the inverse distance relation of elasticity. The total plastic energy release rate is inferred from the data; it is considerably in excess of the critical rate, the Giffith strain energy release rate for onstable crack extension. This disparity is discussed in terms of the regions where energies are released. (Author)

Descriptors :   (*METAL PLATES, FRACTURE(MECHANICS)), DUCTILITY, ELASTIC PROPERTIES, THEORY, STRAIN(MECHANICS), PLASTIC PROPERTIES, SHEETS, DEFORMATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE