Publication detail
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
BERMEJO, R. CHLUP, Z. ŠESTÁKOVÁ, L. ŠEVEČEK, O. DANZER, R.
Czech title
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
English title
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
Type
book chapter
Language
en
Original abstract
Layered ceramics, compared to conventional monolithic ceramics, are good choices for highlyloaded structural applications because they exhibit greater fracture resistance, higher strengths and better mechanical reliability (i.e. they are flaw tolerant materials). The use of tailored residual compressive stresses in the layers is a key parameter to adjust these properties. In this work ceramic laminates are analyzed which have internal residual compressive stresses. The most important factors having influence on the strength and fracture resistance of these laminates are discussed. A fracture mechanics analysis is employed to estimate the crack growth resistance of the material as a function of the crack length. It is found that the proper selection of a suitable strain mismatch (responsible for the generation of residual stresses), volume ratio of the layer materials and thickness and distribution of individual layers are crucial to achieve a high fracture resistance and/or a high lower limit (threshold) for strength in ceramic laminates. Design guidelines to avoid cracking of layers associated with high residual stresses are also provided. Design criteria to optimize strength and fracture resistance in advanced ceramics to be used in engineering applications are established.
Czech abstract
The aim of this work is to provide design guidelines to optimise strength and toughness of layered ceramics using compressive residual stresses in the internal layers.
English abstract
Layered ceramics, compared to conventional monolithic ceramics, are good choices for highlyloaded structural applications because they exhibit greater fracture resistance, higher strengths and better mechanical reliability (i.e. they are flaw tolerant materials). The use of tailored residual compressive stresses in the layers is a key parameter to adjust these properties. In this work ceramic laminates are analyzed which have internal residual compressive stresses. The most important factors having influence on the strength and fracture resistance of these laminates are discussed. A fracture mechanics analysis is employed to estimate the crack growth resistance of the material as a function of the crack length. It is found that the proper selection of a suitable strain mismatch (responsible for the generation of residual stresses), volume ratio of the layer materials and thickness and distribution of individual layers are crucial to achieve a high fracture resistance and/or a high lower limit (threshold) for strength in ceramic laminates. Design guidelines to avoid cracking of layers associated with high residual stresses are also provided. Design criteria to optimize strength and fracture resistance in advanced ceramics to be used in engineering applications are established.
Keywords in Czech
fracture resistance; ceramic laminates; monolithic ceramics; fracture mechanics analysis; residual stresses
Keywords in English
fracture resistance; ceramic laminates; monolithic ceramics; fracture mechanics analysis; residual stresses
RIV year
2012
Released
19.11.2012
Publisher
John Wiley & Sons, Inc.
Location
Hoboken, NJ, USA
ISBN
9781118205884
Book
Mechanical Properties and Performance of Engineering Ceramics and Composites VII
Edition number
1
Pages from–to
163–174
Pages count
12
BIBTEX
@inbook{BUT96698,
author="Raul {Bermejo} and Zdeněk {Chlup} and Lucie {Malíková} and Oldřich {Ševeček} and Robert {Danzer},
title="Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates",
booktitle="Mechanical Properties and Performance of Engineering Ceramics and Composites VII",
year="2012",
month="November",
pages="163--174",
publisher="John Wiley & Sons, Inc.",
address="Hoboken, NJ, USA",
isbn="9781118205884"
}