About: Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Stress-strain curves of selected plasma-sprayed ceramic coatings were measured by the four-point bending method, with the coating deposited on the compressive or tensile side of the substrate. Uniaxial stress s and deformation e in the central plane of the coating were determined. For deformations \|e\| < 0.1% Young's moduli can be considered constant and were found to be from 18 to 52 GPa. For deformations 0.1% < \|e\| < 0.4% the measured curves show that Young's modulus increases with the compressive deformation and decreases with the tensile deformation. The contribution of intrasplat microcracks to the nonlinearity is discussed. In tensile loading, microcracks are opening and Young's modulus is decreasing whereas in compression closing of microcracks leads to increase in Young's modulus. Two-parametric equation containing linear and quadratic term was successfully used to describe the nonlinear stress-strain curves of plasma sprayed ceramic coatings. Stress-strain curves of selected plasma-sprayed ceramic coatings were measured by the four-point bending method, with the coating deposited on the compressive or tensile side of the substrate. Uniaxial stress s and deformation e in the central plane of the coating were determined. For deformations \|e\| < 0.1% Young's moduli can be considered constant and were found to be from 18 to 52 GPa. For deformations 0.1% < \|e\| < 0.4% the measured curves show that Young's modulus increases with the compressive deformation and decreases with the tensile deformation. The contribution of intrasplat microcracks to the nonlinearity is discussed. In tensile loading, microcracks are opening and Young's modulus is decreasing whereas in compression closing of microcracks leads to increase in Young's modulus. Two-parametric equation containing linear and quadratic term was successfully used to describe the nonlinear stress-strain curves of plasma sprayed ceramic coatings. (en) Křivky napětí-deformace vybraných plazmově nanášených keramických povlaků byly měřeny metodou čtyřbodového ohybu, přičemž povlak byl nanesen na tlakovou nebo tahovou stranu podkladu. Byly určeny jednoosé namáhání s a deformace e ve střední rovině povlaku. Pro deformace \|e\| < 0.1% lze považovat Youngovy moduly za konstantní s velikostmi od 18 do 52 GPa. Pro deformace 0.1% < \|e\| < 0.4% z naměřených křivek plyne, že Youngův modul roste s tlakovou deformací a klesá s deformací tahovou. Je diskutován přínos mikroskopických trhlin uvnitř splatů k této nelinearitě. Při tahovém zatížení se mikroskopické trhliny otevírají a Youngův modul klesá, zatímco při tlaku vede uzavírání trhlin k růstu Youngova modulu. K popisu nelineárních křivek napětí-deformace plazmově nanášených keramických povlaků byly úspěšně užity dvouparametrické rovnice obsahující lineární a kvadratický člen. (cs)
Title	Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings (en) Nelineární závislost napětí-deformace plazmově nanášených keramických povlaků (cs)
skos:prefLabel	Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings (en) Nelineární závislost napětí-deformace plazmově nanášených keramických povlaků (cs)
skos:notation	RIV/61389021:_____/05:00030922!RIV06-AV0-61389021
http://linked.open.../vavai/riv/strany	251;262
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(KSK1010104)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Nohava, Jiří Kroupa, František
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	533034
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/05:00030922
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	plasma spraying; ceramic coatings; Young’s modulus; nonlinear behavior; microcracks (en)
http://linked.open.../riv/klicoveSlovo	microcracks Young’s modulus ceramic coatings plasma spraying nonlinear behavior
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[C98990FE48A9]
http://linked.open...i/riv/nazevZdroje	Acta Technica ČSAV
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Condensed matter physics and materials science
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	50
http://linked.open...iv/tvurceVysledku	Nohava, Jiří Kroupa, František
issn	0001-7043
number of pages	12 (xsd:int)

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