Accession Number : ADA018906

Title :   A Study on Crack Tip Deformation and Ductile Fracture.

Descriptive Note : Technical rept.,

Corporate Author : SYRACUSE UNIV N Y GEORGE SACHS FRACTURE AND FATIGUE RESEARCH LAB

Personal Author(s) : Hu,Wan-liang ; Kuo,Albert S. ; Liu,H. W.

Report Date : AUG 1975

Pagination or Media Count : 15

Abstract : Near tip strains and crack tip opening displacements were both measured with the moire method and calculated with Finite Element Analysis. The equivalent stress intensity factor of a small specimen loaded into general yielding is related to its crack tip strains and stresses. Its relations to the overall deformation of a specimen and the applied stress are also obtained by the near tip stress and strain correlation. Its application to a ductile aluminum is illustrated. In addition, crack tip opening and crack tip advancing were calculated based on the shear separation mode of the unzipping model.

Descriptors :   *FRACTURE(MECHANICS), *DEFORMATION, *ALUMINUM ALLOYS, STEEL, STRESS STRAIN RELATIONS, MOIRE EFFECTS, CRACK PROPAGATION, YIELD POINT, FINITE ELEMENT ANALYSIS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE