Accession Number:

AD0752446

Title:

Some Critical Studies of Macroscopic and Microscopic Fracture Criteria for Steel.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

• Tetelman,A. S.
• Robinson,J. N.
• Mohamed,S. A.
• Ensha,S.

Report Date:

1972-09-01

Pagination or Media Count:

43.0

Abstract:

Research shows how plane strain values of the crack tip opening displacement, COD, can be determined on pre-cracked Charpy specimens loaded well beyond general yield. The measurements are then used to determine K sub Ic values that agree with valid measurements on twelve inch thick specimens of A533 steel. The results of an experimental and analytic visioplasticity investigation is described which allows a determination to be made of the critical local strain required to initiate fracture at the tip of a sharp notch. The report also presents the results and analysis of a study to determine quantitative relations between K sub Ic and K sub Id and microscopic variables such as grain size for cleavage fracture that occurs at low temperatures. Author

Descriptors:

• (*STEEL
• FRACTURE(MECHANICS))
• CRACK PROPAGATION
• DUCTILITY
• STRAIN(MECHANICS)
• PLASTIC PROPERTIES
• RUPTURE

Subject Categories:

• Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE