Abstract
In polycristalline ceramics, the R-Curve effect plays a significant role on the crack propagation. For macrocracks, a decrease of velocity is observed as a function of the applied stress intensity factor due to a crack resistance increase with crack extension. This is due to a shielding of the stress intensity factor near the crack tip caused by transformation toughening or bridging. A shift of the crack velocity — stress intensity factor curve towards higher values of KI can be observed. If the R-Curve effect is substracted from experimental results, an unique crack rate-stress intensity factor at the crack tip curve is obtained.
The crack propagation behaviour under cyclic loading is also influenced by the R-Curve. The crack velocities under alternative stresses are increased. The analysis of fatigue shows that two mechanisms intervene: stress corrosion and pure cyclic mechanisms. The increase of crack rates under cyclic loading is due to a reduction of toughening mechanisms.
Thermal shock behaviour of ceramics can be analysed by a fracture mechanics approach. Materials exhibiting R-Curve behaviour present three crack propagation stages: stable, unstable and again stable propagation. With a strong R-Curve effect, unstable propagation can be avoided so that the retained strength can be enhanced. The R-Curve concept is required to explain the thermal-shock behaviour of ceramics and leads to a good prediction when R-Curves are measured at the temperature of thermal shock.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
R.W. Steinbrech, in: Fracture Mechanics of Ceramics, Vol. 9, Bradt et al., ed., Plenum Press, 187 (1992).
A.G. Evans, J. Am. Ceram-Soc., 73, 187 (1990).
G. Fantozzi and C. Olagnon, Materials Science and Technology, Vol. 13, Structure and Properties of Composites, Tsu-Wei Chou, ed., VCH 183 (1993).
B. Lawn, Fracture of Brittle Solids, Cambridge, University Press (1993).
T. Fett and D. Munz, in: Fracture Mechanics of Ceramics, Vol. 9, Bradt et al., ed., Plenum Press, 219 (1992).
T. Fett and D. Munz, J Am. Ceram. Soc., 75, 958 (1992).
A. Okada, N. Hirosaki and M. Yoshimura, J. Am. Ceram. Soc., 73, 2095 (1990).
M.E. Ebrahimi, J. Chevalier, M. Saadaoui and G. Fantozzi, this proceedings volume.
F. Mignard, Ph. D. Thesis, INSA Lyon (1994).
A.G. Evans and E.R. Fuller, Metall. Trans., 5, 27 (1974).
R.H. Dauskardt and R.O. Ritchie, J Am. Ceram. Soc., 70, 248 (1987).
R.H. Dauskardt, D.B. Marshall and R.O. Ritchie, J Am Ceam. Soc., 73, 893 (1990).
J.F. Tsai, C. Yu and D. Shetty, J Am. Ceram. Soc., 73, 2992 (1990).
G. Grathwohl and T. Liu, J Am. Ceram. Soc., 74, 3028 (1991).
G. Grathwohl and T. Liu, J. Am. Ceram. Soc., 74, 318 (1991).
S.Y. Liu and I.W. Chen, J Am. Ceram. Soc., 74, 1197 (1991).
S.Y. Liu and I.W. Chen, J Am. Ceram. Soc., 74, 1206 (1991).
T. Kawakubo and K. Komeya, J Am. Ceram. Soc., 70, 400 (1987).
F. Guiu, M.J. Reece and D.A. Vaughan, J Mat. Sci., 26, 3275 (1991).
T. Fett and D. Munz, J. Mat. Sci. Let., 12, 352 (1993).
H. Kishimoto, A. Ueno, S. Okawara and H. Kawamoto, J Am. Ceram. Soc., 77, 1324 (1994).
S. Lathabai, J. Rödel and B.R. Lawn, J Am. Ceram. Soc., 74, 1340 (1991).
Y.M. Mai, X. Hu, K. Duan and B. Cotterell, in: Fracture Mechnics of Ceramics, Vol. 9, Bradt et al., ed., Plenum Press, 387 (1992).
J. Chevalier, C. Olagnon and G. Fantozzi, J. Am. Ceram. Soc., to be published.
D.S. Jacobs and I.W. Chen, J. Am. Ceram. Soc., 78, 513 (1995).
T. Fett and D. Munz, J. Mat. Sci. Let., 17, 307 (1998).
J.F. Tsai, J.D. Belnap and D.K. Shetty, J Am. Ceram. Soc., 77, 105 (1994).
D.P.H. Hasselman, J Am. Ceram. Soc., 52, 600 (1969)
D.P.H. Hasselman, J Am. Ceram. Soc., 53, 490 (1969).
M. Saadaoui and G. Fantozzi, Mat. Sci. Eng., A247, 142 (1998).
E.H. Lutz and M.V. Swain, J Am. Ceram. Soc., 74, 2859 (1991).
M.V. Swain, J. Am. Ceram. Soc., 73, 621 (1990).
M.K. Banniste and M.V. Swain, Ceram. Int. 16, 77 (1990).
P.F. Becher, J Am. Ceram. Soc., 64, 37 (1981).
N. Claussen and D.P.H. Hasselman, Thermal Stresses in Severe Environments, Hasselman and Heller, ed., Plenum Press, 381 (1980).
M. Saadaoui, J. Chevalier and G. Fantozzi, this proceedings volume.
M.J. Hoffmann, G.A. Schneider and G. Petzow, Thermal Shock and Thermal Fatigue Behaviour of Advanced Ceramics, Schneider and Petzow, ed., Kluwer, 79 (1993).
J. Chevalier et al., this proceedings volume.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2002 Springer Science+Business Media New York
About this chapter
Cite this chapter
Fantozzi, G., Chevalier, J., Saâdaoui, M. (2002). R-Curve Effect on Slow Crack Growth and Thermal Shock of Ceramics. In: Bradt, R.C., Munz, D., Sakai, M., Shevchenko, V.Y., White, K. (eds) Fracture Mechanics of Ceramics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4019-6_17
Download citation
DOI: https://doi.org/10.1007/978-1-4757-4019-6_17
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-3370-6
Online ISBN: 978-1-4757-4019-6
eBook Packages: Springer Book Archive