Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates

Bermejo, Raúl; Chlup, Zdeněk; Šestáková, Lucie; Ševeček, Oldřich; Dänzer, Robert

doi:10.1002/9781118217467.ch16

Cited by 3 publications

(1 citation statement)

References 57 publications

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“…Recently, thanks to advances in understanding of processes influencing the kinetics of electrophoretic deposition the tailored laminates with perfect and strong interfaces between layers with precise thickness management were prepared [25,26]. The mechanical properties of such layered structures can be designed based on numerical predictions [27,28]. To achieve such extraordinary mechanical properties the development of high internal stresses during material processing especially due to CTE's mismatch and/or phase transformation is utilised [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Micro-fibres containing composites prepared by EPD

Hadraba

Chlup

Drdlík

et al. 2016

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

Micro-fibres containing composites prepared by EPD

Hadraba

Chlup

Drdlík

et al. 2016

Journal of the European Ceramic Society

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Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion

Papšík

Ševeček

Hofer

et al. 2023

Journal of the European Ceramic Society

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Estimation of stepwise crack propagation in ceramic laminates with strong interfaces

Náhlík¹,

Štegnerová²,

Huta³

2015

Frattura Ed Integrità Strutturale

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During the last years many researchers put so much effort to design layered structures combining different materials in order to improve low fracture toughness and mechanical reliability of the ceramics. It has been proven, that an effective way is to create layered ceramics with strongly bonded interfaces. After the cooling process from the sintering temperature, due to the different coefficients of thermal expansion of individual constituents of the composite, significant internal residual stresses are developed within the layers. These stresses can change the crack behaviour. This results to the higher value of so-called apparent fracture toughness, i.e. higher resistance of the ceramic laminate to the crack propagation. The contribution deals with a description of the specific crack behaviour in the layered alumina-zirconia ceramic laminate. The main aim is to clarify crack behaviour in the compressive layer and provide computational tools for estimation of crack behaviour in the field of strong residual stresses. The crack propagation was investigated on the basis of linear elastic fracture mechanics. Fracture parameters were computed numerically and by author's routines. Finite element models were developed in order to obtain a stress distribution in the laminate containing a crack and to simulate crack propagation. The sharp change of the crack propagation direction was estimated using Sih's criterion based on the strain energy density factor. Estimated crack behaviour is qualitatively in a good agreement with experimental observations. Presented approach contributes to the better understanding of the toughening mechanism of ceramic laminates and can be advantageously used for design of new layered ceramic composites and for better prediction of their failure.

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Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates

Cited by 3 publications

References 57 publications

Micro-fibres containing composites prepared by EPD

Micro-fibres containing composites prepared by EPD

Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion

Estimation of stepwise crack propagation in ceramic laminates with strong interfaces

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