Accession Number:

ADA000920

Title:

Thickness Effect on Crack Tip Deformation at Fracture.

Descriptive Note:

Final rept.,

Corporate Author:

SYRACUSE UNIV N Y DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE

Personal Author(s):

Report Date:

1974-09-01

Pagination or Media Count:

23.0

Abstract:

The crack tip deformation at the onset of surface crack growth for four single edge cracked specimens having four different thicknesses were studied. The specimens were made of the ductile and tough HY-80 steel. The thickness contraction in the crack tip region and the tensile strain in the direction of load were measured. The crack tip necking-in acts like a notch. The depths, the root radii, and the angle changes of the necking-in notches were measured. The results indicated that the near tip strain can be used as a fraction criterion of ductile and tough materials. It was also found that the fracture strengths of the cracked specimens can be correlated with the tensile ductilities measured with Clausing specimens. Author

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE