变物性二维梯度板热弹性行为

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1、whencomparedisothermvalueofFGMduringheatingandcoolingprocessb椭饥considefingtempera：ture．dependentmaterialpropertiesandnot，butthelocatlonofisothermwithsamevaluearedifferent．．From恤n啪ericalresultsofthermalstressdistributionregul缸pattemot2D．FGM、Ⅳithtemper抵．dependentmaterialpropertiesitcanbeshow

2、edthatthee觥0f纸and掰yonthevalueandshapeofisostresscontoursofFGMstm姗1sverylarge，mema)‘im吼absolutevalueofthermalisostresscontoursoflowerbo皿darycen仃epositionofstructureamplifiedfrom240MPawhen畛10·05to720姗am户l0。0duringheatingprocess，theaggrandizingrate砌鹋dto200％：methemals仃essvaluedistributiontrend

3、ofthe2D·FGMisdepressedwlmtheraisingof以and4yvalueasawhole；Comparingtemperature-dependentmatenalDropertiesiscoIlsideredandnotconsidered，thedifferencesonthermalmsstleldshapeandisos骶ssvalueof2D．FGMarenotable，themosteX呦lmemals骶ssvaluesof铆og址erdomainonupperhalfofstructurewhich1sconslderedtempera

4、ture．dependentmaterialpropertiesduringcoolingprocessare240MPa觚d260MParespecfively，whentemperature-dependentmaterialproperfies1snotconsideredthevaksare100MPaand120MPa，bythemeansofcompanng1tc纽beh10啪thedepressionofstressvalueisveryremarkable·Consequently，appropriateselectionofparameterscallfu

5、lfiUtherequlreofthemlalstressdimiIlislliI坶ofthemetarialandstructureondesignandappllcatlon，then啪ericalsolutioncanprovetobethereferencestandardtoinspectotherexactRolution．Keywords：似o．dimensionFGMplate；temperature-dependentmatcrialpropertles；planethemo—eIaSticity；finiteelementmethod；heatingpr

6、ocess；coollngIII目录目录第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．1功能梯度材料简介⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1．1功能梯度材料的概念及优点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1。2功能梯度材料的应用前景和研究意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2功能梯度材料力学问题研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．2．1功能梯度材料热弹性力学研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．41．2．2功能梯度材料断裂力学问题研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．81．3本课题的提出⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯．111．3．1本课题的研究方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1l1．3．2本课题的研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯121．3．3本课题的创新性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯131．4本章小结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．14第2章变物性FGM热弹性力学理论基础⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．152．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．152．2物质坐标系与空间坐标系⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．15