Energy-based and local approaches to the strength analysis of ceramic laminates with thermal residual stresses through the finite element method

P. Vena, E. Bertarelli, D. Gastaldi, R. Contro

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)576-582
Number of pages7
JournalMechanics Research Communications
Volume35
Issue number8
DOIs
Publication statusPublished - Dec 2008

Keywords

  • Ceramic laminates
  • Finite element method
  • Linear elastic fracture mechanics
  • Weibull statistic

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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