SYMPOSIA PAPER Published: 01 January 1977
STP35535S

Ductile Rupture Blunt-Notch Fracture Criterion

Source

A blunt-notch fracture criterion is proposed. The criterion is shown to be applicable for the initiation of ductile tearing in the plane-strain regime. Elastic to fully plastic behavior can be treated. Experiments have shown ductile crack initiation to occur at a J-integral value which is only a function of notch root radius. Two specimen geometries have been tested using a nickel-chromium-molybdenum-vanadium-rotor steel. The onset of ductile tearing from the notch tip was measured using the multiple specimen heat tinting resistance curve technique. Notch-root radii for blunt-notch compact-toughness specimens and center-notched panels varied from 0.10 in. (0.25 cm) to that of a fatigue precrack. Results are also presented for blunt-notch toughness tests of aluminum alloy 6061-T651 using compact-toughness specimens.

Author Information

Begley, JA
Ohio State University, Columbus, Ohio
Logsdon, WA
Ohio State University, Columbus, Ohio
Landes, JD
Ohio State University, Columbus, Ohio
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Details
Developed by Committee: E08
Pages: 112–120
DOI: 10.1520/STP35535S
ISBN-EB: 978-0-8031-4703-4
ISBN-13: 978-0-8031-0356-6