Accession Number : AD0715421

Title :   Strain Distribution and Deformation at the Crack Tip in Low Cycle Fatigue.

Descriptive Note : Final technical rept. 2 Apr 69-1 Apr 70,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Bowles,C. Q.

Report Date : JUN 1970

Pagination or Media Count : 70

Abstract : The behavior of the material in the tip region of fatigue cracks in 1100-F Al and 4340-A6 steel was studied. The size of the plastic zone which accompanies the crack and the extent of the strain field which is associated with that plastic zone were observed by chemical etching techniques. As part of the experimental program, a technique was developed for making a cast replica of the fatigue crack by in situ infiltration with plastic. These castings were studied by scanning electron microscopy. (Author)

Descriptors :   (*FATIGUE(MECHANICS), *CRACKS), ALUMINUM ALLOYS, STEEL, CRACK PROPAGATION, STRESSES, STRAIN(MECHANICS), FRACTOGRAPHY

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE