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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F05%3A00030922%21RIV06-AV0-61389021
rdf:type
n11:Vysledek skos:Concept
dcterms: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. 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.
dcterms:title
Nelineární závislost napětí-deformace plazmově nanášených keramických povlaků Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings
skos:prefLabel
Nelineární závislost napětí-deformace plazmově nanášených keramických povlaků Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings Nonlinear Stress-Strain Behavior of Plasma Sprayed Ceramic Coatings
skos:notation
RIV/61389021:_____/05:00030922!RIV06-AV0-61389021
n3:strany
251;262
n3:aktivita
n12:P
n3:aktivity
P(KSK1010104)
n3:cisloPeriodika
3
n3:dodaniDat
n8:2006
n3:domaciTvurceVysledku
n13:4441451 n13:5169828
n3:druhVysledku
n9:J
n3:duvernostUdaju
n6:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
533034
n3:idVysledku
RIV/61389021:_____/05:00030922
n3:jazykVysledku
n14:eng
n3:klicovaSlova
plasma spraying; ceramic coatings; Young’s modulus; nonlinear behavior; microcracks
n3:klicoveSlovo
n10:nonlinear%20behavior n10:ceramic%20coatings n10:Young%E2%80%99s%20modulus n10:plasma%20spraying n10:microcracks
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[C98990FE48A9]
n3:nazevZdroje
Acta Technica ČSAV
n3:obor
n7:JH
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n15:KSK1010104
n3:rokUplatneniVysledku
n8:2005
n3:svazekPeriodika
50
n3:tvurceVysledku
Nohava, Jiří Kroupa, František
s:issn
0001-7043
s:numberOfPages
12