Accession Number : AD0737844

Title :   A Generalized Elastic Theory of Fracture.

Descriptive Note : Technical rept.,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Ju,F. D. ; Browning,Richard V.

Report Date : JAN 1972

Pagination or Media Count : 85

Abstract : A theory of fracture is proposed for brittle and near brittle fracture. The theory includes the Griffith-Irwin theory as a special case. Developed for opening mode loading in plane geometry, the theory is based on a solution for a slit in an infinite elastic plate with an arbitrary relative displacement along the slit. Particular relative displacement functions are chosen and studied in detailed by calculating the mean stress, maximum shear stress, maximum tensile stress, and energy density fields as well as the tractions applied on the slit. The particular solutions chosen for examination all exhibit singularities in the stress fields at the slit end, with behavior ranging from the classical stress-free slit elastic solution to the logarithmic solutions of Ju. A stress intensity factor is proposed based on the solutions that generate fractional power singularities. This stress intensity factor is a generalization of the Irwin-Griffith factor. (Author)

Descriptors :   (*FRACTURE(MECHANICS), THEORY), CRACKS, CRACK PROPAGATION, ELASTIC PROPERTIES, SHEAR STRESSES, TENSILE PROPERTIES, MATHEMATICAL ANALYSIS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE