Detail publikace
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
BERMEJO, R. CHLUP, Z. ŠESTÁKOVÁ, L. ŠEVEČEK, O. DANZER, R.
Český název
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
Anglický název
Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates
Typ
kapitola v knize
Jazyk
en
Originální abstrakt
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.
Český abstrakt
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.
Anglický abstrakt
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.
Klíčová slova česky
fracture resistance; ceramic laminates; monolithic ceramics; fracture mechanics analysis; residual stresses
Klíčová slova anglicky
fracture resistance; ceramic laminates; monolithic ceramics; fracture mechanics analysis; residual stresses
Rok RIV
2012
Vydáno
19.11.2012
Nakladatel
John Wiley & Sons, Inc.
Místo
Hoboken, NJ, USA
ISBN
9781118205884
Kniha
Mechanical Properties and Performance of Engineering Ceramics and Composites VII
Číslo edice
1
Strany od–do
163–174
Počet stran
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"
}