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Crack Behaviour in Laminar Ceramics with Strong Interfaces
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SYSNO ASEP 0354085 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Crack Behaviour in Laminar Ceramics with Strong Interfaces Author(s) Náhlík, Luboš (UFM-A) RID, ORCID
Šestáková, Lucie (UFM-A)
Hutař, Pavel (UFM-A) RID, ORCIDNumber of authors 3 Source Title Key Engineering Materials - ISSN 1013-9826
Roč. 417-418, - (2010), s. 301-304Number of pages 4 s. Language eng - English Country CH - Switzerland Keywords ceramic laminate ; crack propagation direction ; residual stress ; flaw tolerant ceramic Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects KJB200410803 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA106/09/0279 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000279319200076 Annotation The paper deals with crack propagation in ceramic laminates. Assumptions of linear elastic fracture mechanics and small scale yielding are considered. Crack behaviour in a ceramic laminate body under external loading is investigated. Strong residual stresses due to different coefficients of thermal expansion of individual material layers are taken into account in finite element calculations. The change of crack propagation direction at the material interface is estimated on the base of the strain energy density factor and maximum tangential stress criteria. The influence of thickness of laminate layers on crack propagation direction is estimated. The stepwise crack propagation through the Al2O3-ZrO2 ceramic laminate is numerically estimated. It can be concluded that good agreement between the estimated crack path and experimental data was found. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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