Bars loaded by opposite concentrated forces via rollers are appropriate test specimens for the determination of the fracture toughness, and the crack resistance curve (R-curve) of ceramic materials. In this paper stress solutions for the proposed test specimens are provided, as well as the stress intensity factor and the T-stress solutions. As practical applications, R-curves are determined for a soft PZT ceramic and several alumina ceramics.
Fracture Toughness Testing on Bars Under Opposite Cylinder Loading
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002; Paper No. 2002-GT-30507. Manuscript received by IGTI, Dec. 2001, final revision, Mar. 2002. Associate Editor: E. Benvenuti.
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Fett , T., Munz , D., and Thun, G. (March 2, 2004). "Fracture Toughness Testing on Bars Under Opposite Cylinder Loading ." ASME. J. Eng. Gas Turbines Power. January 2004; 126(1): 50–54. https://doi.org/10.1115/1.1639003
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