Some Critical Studies of Macroscopic and Microscopic Fracture Criteria for Steel.
CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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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
- Metallurgy and Metallography