Abstract
A wedge-loaded tapered DCB specimen is proposed for fracture toughness and stable crack growth measurements of ceramic materials at elevated temperatures. The specimen is wedge-loaded by a compression pin seated in the starter notch. By appropriate selection of the specimen’s taper and starter notch angle, the stress intensity factor is maintained relatively constant through 50 percent of the test section. Room temperature fracture toughness testings of commercial grade polycrystalline alumina specimens indicate that the crack will run straight for approximately 50 percent of the length of the test section without side grooving. A moderate 10 percent side grooving was sufficient to maintain straight crack extension throughout the entire specimen length.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
A.G. Evans, “Fracture Mechanics Determination”, Fracture Mechanics of Ceramics, Vol. 1, edited by R.C. Bradt, D.P.H. Hasselman and F.F. Lange, Plenum Press, 1974, pp. 17–48.
S.M. Wiederhorn, A.G. Evans and D.E. Roberts,“A Fracture Mechanics Study of the Skylab Windows”, Fracture Mechanics of Ceramics, Vol. 2, edited by R.C. Bradt, D.P.H. Hasselman and F.F. Lange, Plenum Press, 1974, pp. 829–842.
D.J. Rowcliffe and P.T. Lum, “A Notched-Ring Fracture Toughness Test for Ceramics”, a paper presented at this symposium.
L.M. Barker, “Short Rod KIc Measurements of Al2O3”, a paper presented at this symposium.
A.G. Evans, “A Method for Evaluating the Time Dependent Failure Characteristics of Brittle Materials — and Its Application to Poly-crystalline Alumina”, Journal of Material Science, I, 1972, pp. 1137–1146.
A.G. Evans, “High-Temperature Slow Crack Growth in Ceramic Materials”, Ceramics for High Performance Applications, Proceedings of the 2nd Army Materials Technology Conference, 1973, pp. 373–395.
G.G. Trantina, “Stress Analysis of the Double Torsion Specimen”, to be published in the Journal of American Ceramic Society.
D.P. Williams and A.G. Evans, “Method for Studying Slow Crack Growth”, Journal of Testing and Evaluation, 1, (4), 1973, pp. 264–270.
“Three-Dimensional Fracture Analysis”, edited by L.E. Hulbert, Proc. of a Workshop Held at Battelle’s Columbus Laboratory, April 26–28, 1976, Battelle Columbus Laboratories Research Report.
R.G. Hoagland, R.C. Gehlen, A.R. Rosenfield and G.T. Hahn, “The Application of D.C.B. Specimens for Measuring the Crack Arrest Properties of A533 B and Other Steels”, to be published in Fast Fracture and Crack Arrest, ASTM STP 627, 1977.
J.E. Srawley and B. Gross, “Stress-Intensity Factors for Crack-line-loaded Edge-crack Specimens”, NASA TN D-3820, February 1967.
A.S. Kobayashi, “Experimental Techniques in Fracture Mechanics”, Iowa State University Press, 1973, pp. 14–24.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1978 Plenum Press, New York
About this chapter
Cite this chapter
Kobayashi, A.S., Staley, L.I., Emery, A.F., Love, W.J. (1978). A Fracture Specimen for High-Temperature Testing. In: Bradt, R.C., Hasselman, D.P.H., Lange, F.F. (eds) Flaws and Testing. Fracture Mechanics of Ceramics, vol 3. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7017-2_25
Download citation
DOI: https://doi.org/10.1007/978-1-4615-7017-2_25
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-7019-6
Online ISBN: 978-1-4615-7017-2
eBook Packages: Springer Book Archive