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Simulation of Polycrystalline Ceramics with Micro-Cracks

Published online by Cambridge University Press:  01 February 2011

Jianwu Cao ,
Yoshihisa Sakaida ,
Yasuo Nagano  and
Hiroshi Kawamoto
Jianwu Cao
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1, Mutsuno, Atsuta-ku Nagoya 456-8587, Japan
Yoshihisa Sakaida
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1, Mutsuno, Atsuta-ku Nagoya 456-8587, Japan
Yasuo Nagano
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1, Mutsuno, Atsuta-ku Nagoya 456-8587, Japan
Hiroshi Kawamoto
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 2-4-1, Mutsuno, Atsuta-ku Nagoya 456-8587, Japan
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Abstract

The micro FEM model, which was considered in the middle bottom of a four-point bending macro FEM model, was constructed from a SEM micrograph of an Al2O3-10vol%ZrO2 ceramic, in which the crystallographic information was given to each grain randomly. One micro-crack was introduced in the micro FEM model as a basic case to simulate the four-point bending strength. The strength was determined by the average stress in a one-grain size distance from the crack tip. Two types of micro-cracks were introduced in the model as a second micro-crack, and the strength was compared with the basic case. For the case in which the second crack is parallel to the first crack and apart from the first crack in horizontal direction, the strength was increasing with the second crack closer to the first crack. For the case in which the second crack is parallel to the first crack but apart from the first crack in vertical direction, the strength was decreasing with the second crack closer to the first crack.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 731: Symposium W – Modeling and Numerical Simulation of Materials Behavior and Evolution , 2002 , W5.18
Copyright
Copyright © Materials Research Society 2002

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References

1. Cleveland, J. J. and Bradt, R. C., J. Am. Ceram. Soc., 61, 478 (1978).Google Scholar
2. Clark, D. R., Acta Metall., 28, 913 (1980).Google Scholar
3. Cao, J., Sakaida, Y., and Matsui, M., Ceramic Engineering and Science Proceedings, 22, 299 (2001).Google Scholar
4. Hertzberg, R. W., ‘Deformation and fracture mechanics of engineering materials’, 2edn, New York, Wiley. Chaps.7-8; (1983).Google Scholar
5. Lawn, B. R., J. Am. Ceram. Soc., 66, 83 (1983).Google Scholar
6. Hockey, B. J., Fracture mechanics of ceramics, Vol. 6, (ed. Bradt, R. C. and Evans, A. G.), New York, Plenum Press. 637 (1983).Google Scholar
7. Westergard, H. W., Trans. ASTM. J. Appl. Mech., 61, A–49, 1973.Google Scholar
8. Wachtman, J. B., Tefft, W. E., Lam, D. G. and Stinchfield, R.P., J. Res. Natl. Bur. Std, 64A, 213 (1960).Google Scholar
9. Hayakawa, M., Miyauchi, H, Ikegami, A. and Nishda, M., Materials Transactions, JIM, 39, 268 (1998).Google Scholar