SYMPOSIA PAPER Published: 01 January 1984
STP32734S

Specimen Size and Geometry Effects on Fracture Toughness of Aluminum Oxide Measured with Short-Rod and Short-Bar Chevron-Notched Specimens

Source

Plane-strain fracture toughness measurements were made on aluminum oxide using short-rod and short-bar chevron-notched specimens previously calibrated by the authors for their dimensionless stress intensity factor coefficients. The measured toughness varied systematically with variations in specimen size, proportions, and chevron notch angle apparently due to their influence on the amount of crack extension to maximum load (the measurement point). The toughness variations are explained in terms of a suspected rising R-curve for the material tested, along with a discussion of an unavoidable imprecision in the calculation of KIc for materials with rising R-curves when tested with chevron-notched specimens.

Author Information

Shannon, JL
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio
Munz, DG
University of Karlsruhe, Karlsruhe, FR (West) Germany
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 270–280
DOI: 10.1520/STP32734S
ISBN-EB: 978-0-8031-4917-5
ISBN-13: 978-0-8031-0401-3