Energy-based and local approaches to the strength analysis of ceramic laminates with thermal residual stresses through the finite element method
✍ Scribed by P. Vena; E. Bertarelli; D. Gastaldi; R. Contro
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 574 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0093-6413
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✦ Synopsis
This paper deals with the strength analysis of ceramic laminates subjected to residual stress fields. In particular, alumina/mullite/zirconia ceramic materials have been taken into consideration. To this purpose, an energy-based approach and a micromechanical local approach have been used within the framework of the finite element method. The results obtained through the numerical analyses are consistent with the experimental ones, providing a correct estimation of the limit strength; furthermore, a lower bound on the external applied loads, below which no crack propagation occurs, can be identified. The local approach has led to a strength distribution that deviates from the typical Weibull distribution; this is owed to the residual stress field. Indeed, a stress-dependent Weibull modulus has been found.