SYMPOSIA PAPER Published: 24 August 2020

Mixed-Mode Crack Growth Using the Compact Specimen


Combined Mode I and Mode III crack growth was examined for a high-strength low-alloy (HSLA) steel. Resolution of the shear and normal components of load and displacement of a modified compact tension specimen with the crack plane oriented at – 45 deg to the broad face showed that the shear (Mode III) contribution to toughness was dominant. Mode III toughness was more sensitive to strength than Mode I toughness. A dominance of crack growth behavior by the tendency toward shear instability is postulated.

Author Information

Miglin, M., T.
Babcock and Wilcox, Alliance, Ohio, US
Lin, I., -H.
National Bureau of Standards, Colo., Ohio, US
Hirth, J., P.
Department of Metallurgical Engineering, Ohio State University, Columbus, Ohio, US
Rosenfield, A., R.
Battelle-Columbus Laboratories, Columbus, Ohio, US
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Developed by Committee: E08
Pages: 353–369
DOI: 10.1520/STP791B1983021
ISBN-EB: 978-0-8031-7720-8
ISBN-13: 978-0-8031-0729-8