Residual Stress Distributions in Ceramics |
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| Authors: | André Zimmermann Edwin R Fuller Jürgen Rödel |
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| Affiliation: | Ceramics Group, Darmstadt University of Technology, 64287 Darmstadt, Germany;Ceramics Division, National Institute of Standards and Technology, Gaithersburg Maryland 20899 |
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| Abstract: | Residual stress distributions in ceramics can be calculated for a coordinate system fixed by the specimen geometry as well as for the crystal system. Computations were performed using alumina as a model system with the residual stresses caused by thermal expansion anisotropy. Mean values and standard deviations of the stress distributions are calculated for a plane stress as well as a plane strain scenario in a laboratory coordinate system and compared to distributions of stresses occuring along the a -axis and c -axis of alumina. In addition, stress fluctuations in the whole assembly of grains are compared with stress fluctuations within and between individual grains. |
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