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Fracture Toughness Testing on Bars Under Opposite Cylinder Loading

[+] Author Affiliations
Theo Fett, Dietrich Munz, Gerhard Thun

Forschungszentrum Karlsruhe, Karlsruhe, Germany

Paper No. GT2002-30507, pp. 97-102; 6 pages
doi:10.1115/GT2002-30507
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3609-6 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

Bars loaded by opposite concentrated forces via rollers are appropriate test specimens for the determination of the fracture toughness, KIc , 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.

Copyright © 2002 by ASME

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