陶瓷-金屬梯度熱障涂層熱應(yīng)力的有限元分析.pdf

1、寧夏大學(xué)碩士學(xué)位論文陶瓷金屬梯度熱障涂層熱應(yīng)力的有限元分析姓名：徐燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用數(shù)學(xué)指導(dǎo)教師：李星20100501AbstractInrecentyears，謝也thedevelopingofmodemindustrialtechnologyinaeronautic，aerospaceandweapons，etc，itisbecomingimportanttoresearchthemechanicalandthermal

2、responseformetalceramicgradedthermalbarriercoatingunderserviceenvironmentThethermalbarriercoatingiSamultilayercoatingthatincludeametallicbondcoat，atleastonemetalceramiclayerdepositedonthebondcoat，andaceramictoplayerdepos

3、itedonthemetalceramiclayerTheceramictoplayerhasthermalpropertiesadaptedforrapidthermalcyclingapplicationsThecoatinganditsindividuallayercallbeanythicknessforaparticularapplicationSothisnonhomogeneouscompositecoatingcombi

4、nestheadvantagesofmetalandceramic，andCanbesatisfiedthedemandforconstructionunderhiightemperatureInengineering，itismostimportanttoensurethecoupledanalysisoftemperatureandstressdistributionthroughthethicknessofmultilayerco

5、atingunderserviceconditions∞inthispaperthegoalistooptimizethethicknessofeachlayertominimizethestressThispaperselectsmetalceramicgradedthermalbarriercoatingsasresearchobject，anddosomeresearchesasfollows：1Baseonfunctionalv

6、ariationprinciple，thefiniteelementbasicequationofheatconductionproblemofFGMmaterialisdeducedMeanwhile，thispaperderivesthefiniteelementbasicfunctionofFGMmaterialthermoelasticproblembyweightedresidnalmethod2Onthistheorybas

7、is，thispaperderivesthefiniteelementbasicfunctionofmetalceramicgradedthermalbarriercoatingsheatconductionandthermalstressproblemThroughnumericalanalysis，thesteadytemperatureandthermalstressdistributionsinthegradedthermalb

8、arriercoatingsincombinationofpracticalexampleisresearchedTheinfluenceofthelayers，thecompositionvariationandthicknessofthegradedlayeronthermalstressofgradedcoatingismainlyresearchedThepaperprovidesatheorycalculationandana