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ID:7968255
大小:2.06 MB
页数:388页
时间:2018-03-03
《akin j. e. finite element analysis with error estimation (2000, 388 pages)外语英文电子书》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、FiniteElementAnalysiswithErrorEstimationbyJ.E.AkinRiceUniversityDepartmentofMechanicalEngineeringandMaterialsScienceHouston,TX77251−1892Copyright©2000AllRightsReservedDraft−2/24/01©2001J.E.Akin1Chapter1INTRODUCTION1.1FiniteElementMethodsThegoalofthistextistointroducefiniteelemen
2、tmethodsfromaratherbroadperspective.Wewillconsiderthebasictheoryoffiniteelementmethodsasutilizedasanengineeringtool.Likewise,exampleengineeringapplicationswillbepresentedtoillustratepracticalconceptsofheattransfer,stressanalysis,andotherfields.Todaythesubjectoferroranalysisforada
3、ptivityoffiniteelementmethodshasreachedthepointthatitisbotheconomicalandreliableandshouldbeconsideredinanengineeringanalysis.Finally,wewillconsiderinsomedetailthetypicalcomputationalproceduresrequiredtoapplymodernfiniteelementanalysis,andtheassociatederroranalysis.Inthischapterwe
4、willbeginwithanoverviewofthefiniteelementmethod.Wecloseitwithconsiderationofmodernprogrammingapproachesandadiscussionofhowthesoftwareprovideddiffersfromtheauthor'spreviousimplementationsoffiniteelementcomputationalprocedures.Inmodernengineeringdesignitisraretofindaprojectthatdoesn
5、otrequiresometypeoffiniteelementanalysis(FEA).Whennotactuallyrequired,FEAcanusuallybeutilizedtoimproveadesign.ThepracticaladvantagesofFEAinstressanalysisandstructuraldynamicshavemadeittheaccepteddesigntoolforthelasttwodecades.Itisalsoheavilyemployedinthermalanalysis,especiallyin
6、connectionwiththermalstressanalysis.Clearly,thegreatestadvantageofFEAisitsabilitytohandletrulyarbitrarygeometry.Probablyitsnextmostimportantfeaturesaretheabilitytodealwithgeneralboundaryconditionsandtoincludenonhomogeneousandanisotropicmaterials.Thesefeaturesalonemeanthatwecant
7、reatsystemsofarbitraryshapethataremadeupofnumerousdifferentmaterialregions.Eachmaterialcouldhaveconstantpropertiesorthepropertiescouldvarywithspatiallocation.Totheseverydesirablefeatureswecanaddalargeamountoffreedominprescribingtheloadingconditionsandinthepostprocessingofitemss
8、uchasthestressesandstrains.Forellipticalboundaryvaluep
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