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Microcrack Evolution in Alumina Ceramics: Experiment and Simulation

Galai Yousef, S. and Rödel, Jürgen and Fuller, E and Zimmermann, A. and El-Dasher, B. S. (2005):
Microcrack Evolution in Alumina Ceramics: Experiment and Simulation.
In: Journal of the American Ceramic Society, pp. 2809-2816, 88, (10), ISSN 0002-7820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2005.00312.x],
[Article]

Abstract

Thermal expansion induced spontaneous microcracking in large-grained polycrystalline alumina was analyzed using experimental techniques as well as numerical simulations. A microstructure-based finite-element model (object oriented finite-element analysis) was used to simulate the accumulation of microcrack damage upon cooling, taking the measured real crystallographic orientations of the grains into account. Crack initiation and propagation were simulated using a Griffith-type fracture criterion. The computed evolution of Young's modulus as a function of temperature and grain size was compared with the corresponding experimental results.

Item Type: Article
Erschienen: 2005
Creators: Galai Yousef, S. and Rödel, Jürgen and Fuller, E and Zimmermann, A. and El-Dasher, B. S.
Title: Microcrack Evolution in Alumina Ceramics: Experiment and Simulation
Language: English
Abstract:

Thermal expansion induced spontaneous microcracking in large-grained polycrystalline alumina was analyzed using experimental techniques as well as numerical simulations. A microstructure-based finite-element model (object oriented finite-element analysis) was used to simulate the accumulation of microcrack damage upon cooling, taking the measured real crystallographic orientations of the grains into account. Crack initiation and propagation were simulated using a Griffith-type fracture criterion. The computed evolution of Young's modulus as a function of temperature and grain size was compared with the corresponding experimental results.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 88
Number: 10
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00312.x
Identification Number: doi:10.1111/j.1551-2916.2005.00312.x
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