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MAJian1 ZHANGHongyu1 YANLiang1 RANZhiguo2
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Abstract: Whenspacecraftworks,itwillsufferdifferenttemperatureenvironments,whiletemperaturedifferencewillalwaysintroducechangesofshapeandsizeofcompositestructures.However,somespacecraftpartsneedhighdimensionalstabilitytokeepitsrightfunction.Tillnow,themechanicalpropertiesofthecompositehavebeenwidelystudied,however,thethermalpropertiesofcompositeandoptimizationofcompositeconsideringboththermalandmechanicalpropertiesarefarfromwellstudied.Compositetubeswereoptimizedtoagivencoefficientofthermalexpansion(CTE),andthestiffnessofthosetubeswastakenintoconsiderationatthesametime.Firstly,multiscalenumericalmodelsweredevelopedtocalculatetheCTE.Inmicro-scalemode,theCTEofunidirectionalfiberreinforcedcompositewascalculatedbythefiberCTEthroughrepresentativevolumeelements(RVE).In macro-scale,acompositetubemodelwasgeneratedtopredictbothaxialandtransverseCTEofthetubebasedontheCTEcomputedbyRVE.Compositelaminatesandtubeswithgivenplieswereanalyzedandtested.Comparisonbetweenthepredictedresultsandtheexperimentaloneverifiedthemodel,whichmadethefoundationfortheoptimizationmode.Secondly,optimizationmodelsforcompositetrussstructurewerecreated.Theconjugategradientmethodwasadoptedtooptimizethepliesofcompositeparts,andthethermal-mechanicaloptimizingmethodwasdeveloped.Finally,thesatellitesupporttrussstructurewasanalyzedbythethermal-mechanicaloptimizingmethod.Analyzedresultsshowthatthisoptimizedsupportstructureandthewholeantennahaveanexcellentthermaldimensionalstability.Thethermalmechanicaloptimizingmethodcanbeusedforthermalstabilitydesignandanalysisofcompositesupporttrussstructures.
Key words: Truss, Multi-scale;Optimizingdesign, Thermalstability, Representativevolumeelement, Coefficientofthermalexpansion, Satellite
MA Jian, ZHANG Hong-Yu, YAN Liang, RAN Zhi-Guo. Thermal-mechanicalOptimizingAnalysisonMulti-scaleNumericalModelforCompositeStructureofSatellite[J]. , doi: 10.3780/j.issn.1000-758X.2015.04.005.
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URL: http://journal26.magtechjournal.com/kjkxjs/EN/10.3780/j.issn.1000-758X.2015.04.005
http://journal26.magtechjournal.com/kjkxjs/EN/Y2015/V35/I4/30