Detail publikace
Odhad zdánlivé lomové houževnatosti keramických laminátů založený na zobecněném faktoru hustoty deformační energie
NÁHLÍK, L. ŠESTÁKOVÁ, L. HUTAŘ, P.
Český název
Odhad zdánlivé lomové houževnatosti keramických laminátů založený na zobecněném faktoru hustoty deformační energie
Anglický název
Estimation of apparent fracture toughness of ceramic laminates based on generalized strain energy density factor
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
The paper presented deals with fracture behavior of ceramic laminates. Assumptions of the linear elastic fracture mechanics and small scale yielding are considered. In this frame the residual stresses in individual layers of Al2O3/5vol.%t-ZrO2 (ATZ) and Al2O3/30vol.%m-ZrO2 (AMZ) are determined. The procedure based on generalization of Sih's strain energy density factor to the case of a crack touching the interfaces between two dissimilar materials is used for determination of effective values of stress intensity factor at material interfaces. Important increase of the fracture toughness at AMZ/ATZ interface was predicted in comparison to the fracture toughness of individual material components. Predicted values were compared with data available in literature and mutual good agreement was found. Procedure suggested can be used for estimation of resistance to crack propagation of multilayered structures and its design. The procedure can contribute to enhancing of reliability and safety of the structural ceramic or generally of layered composites with strong interfaces.
Český abstrakt
Článek se zabývá lomovým chováním keramických laminátů. Předpokládá se platnost lineární elastické lomové mechaniky. Je použita metoda založená na hodnotě zobecněného faktoru hustoty deformační energie pro určení efektivní hodnoty součinitele intenzity napětí na rozhraní. Data jsou srovnávána s hodnotami uváděnými v literatuře.
Anglický abstrakt
The paper presented deals with fracture behavior of ceramic laminates. Assumptions of the linear elastic fracture mechanics and small scale yielding are considered. In this frame the residual stresses in individual layers of Al2O3/5vol.%t-ZrO2 (ATZ) and Al2O3/30vol.%m-ZrO2 (AMZ) are determined. The procedure based on generalization of Sih's strain energy density factor to the case of a crack touching the interfaces between two dissimilar materials is used for determination of effective values of stress intensity factor at material interfaces. Important increase of the fracture toughness at AMZ/ATZ interface was predicted in comparison to the fracture toughness of individual material components. Predicted values were compared with data available in literature and mutual good agreement was found. Procedure suggested can be used for estimation of resistance to crack propagation of multilayered structures and its design. The procedure can contribute to enhancing of reliability and safety of the structural ceramic or generally of layered composites with strong interfaces.
Klíčová slova česky
vrstevnaté konstrukce, zbytkové napětí, bimateriálové rozhraní, hustota deformační energie, lomová houževnatost, keramický kompozit
Klíčová slova anglicky
layered structures, residual stress, flaw tolerance, bimaterial interface, strain energy density, fracture toughness, ceramic composite.
Rok RIV
2008
Vydáno
02.09.2008
Nakladatel
VUTIUM Brno
Místo
Brno
ISBN
9781617823190
Kniha
17th European Conference on Fracture
Strany od–do
1522–1529
Počet stran
8
BIBTEX
@inproceedings{BUT31228,
author="Luboš {Náhlík} and Lucie {Malíková} and Pavel {Hutař},
title="Estimation of apparent fracture toughness of ceramic laminates based on generalized strain energy density factor",
booktitle="17th European Conference on Fracture",
year="2008",
month="September",
pages="1522--1529",
publisher="VUTIUM Brno",
address="Brno",
isbn="9781617823190"
}