DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
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
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
Distribution Statement:
APPROVED FOR PUBLIC RELEASE