Prediction of crack propagation in layered ceramics with strong interfaces

0354047 - ÚFM 2011 RIV GB eng J - Journal Article
Náhlík, Luboš - Šestáková, L. - Hutař, Pavel - Bermejo, R.
Prediction of crack propagation in layered ceramics with strong interfaces.
Engineering Fracture Mechanics. Roč. 77, č. 11 (2010), s. 2192-2199. ISSN 0013-7944. E-ISSN 1873-7315
R&D Projects: GA AV ČR(CZ) KJB200410803; GA ČR GA101/09/1821
Institutional research plan: CEZ:AV0Z20410507
Keywords : Ceramic laminate * Crack propagation direction * Residual stress * Flaw tolerant ceramics * Optimal design
Subject RIV: JL - Materials Fatigue, Friction Mechanics
Impact factor: 1.571, year: 2010

The crack propagation under flexure in layered ceramics designed with strong interfaces and high compressive residual stresses is investigated by means of FE simulations and compared with experimental observations on Al2O3–ZrO2 multilayered ceramics. The change of crack propagation direction on the interface is assessed based on the strain energy density and maximum tangential stress criteria. The influence of the layer thickness on the crack propagation direction is evaluated. The estimated crack path (crack deflection angle) obtained through FE calculations is in agreement with the experimental observations. The results can be used for the design of layered ceramics with enhanced crack growth resistance
Permanent Link: http://hdl.handle.net/11104/0193133