欢迎来到天天文库
浏览记录
ID:34974763
大小:688.84 KB
页数:46页
时间:2019-03-15
《Sol Materials Science and EngineeringCH16.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、16-1CHAPTER16COMPOSITESPROBLEMSOLUTIONSLarge-ParticleComposites16.1TheelasticmodulusversusvolumepercentofWCisshownbelow,onwhichisincludedbothupperandlowerboundcurves;thesecurvesweregeneratedusingEquations16.1and16.2,respectively,aswellasthemoduliofelasticityforcobaltandWCgivenintheproblemstatement
2、.Excerptsfromthisworkmaybereproducedbyinstructorsfordistributiononanot-for-profitbasisfortestingorinstructionalpurposesonlytostudentsenrolledincoursesforwhichthetextbookhasbeenadopted.AnyotherreproductionortranslationofthisworkbeyondthatpermittedbySections107or108ofthe1976UnitedStatesCopyrightActw
3、ithoutthepermissionofthecopyrightownerisunlawful.16-216.2ThisproblemasksforthemaximumandminimumthermalconductivityvaluesforaTiC-Nicermet.UsingamodifiedformofEquation16.1themaximumthermalconductivitykiscalculatedasmaxk=kV+kV=kV+kVmaxmmppNiNiTiCTiC=(67W/m-K)(0.10)+(27W/m-K)(0.90)=31.0W/m-KUsingamodi
4、fiedformofEquation16.2,theminimumthermalconductivitykwillbeminkkk=NiTiCminVk+VkNiTiCTiCNi(67W/m-K)(27W/m-K)=(0.10)(27W/m-K)+(0.90)(67W/m-K)=28.7W/m-KExcerptsfromthisworkmaybereproducedbyinstructorsfordistributiononanot-for-profitbasisfortestingorinstructionalpurposesonlytostudentsenrolledincourses
5、forwhichthetextbookhasbeenadopted.AnyotherreproductionortranslationofthisworkbeyondthatpermittedbySections107or108ofthe1976UnitedStatesCopyrightActwithoutthepermissionofthecopyrightownerisunlawful.16-316.3Giventheelasticmoduliandspecificgravitiesforcopperandtungstenweareaskedtoestimatetheupperlimi
6、tforspecificstiffnesswhenthevolumefractionsoftungstenandcopperare0.70and0.30,respectively.Therearetwoapproachesthatmaybeappliedtosolvethisproblem.Thefirstistoestimateboththeupperlimitsofelasticmodulus[E(u)]andspecificgravity(ρ)forthecomposite,usingexpressionsoftheformofEquation16.1,ccandthentaketh
7、eirratio.UsingthisapproachE(u)=EV+EVcCuCuWW=(110GPa)(0.30)+(407GPa)(0.70)=318GPaAndρ=ρV+ρVcCuCuWW=(8.9)(0.30)+(19.3)(0.70)=16.18ThereforeEc(u)318GPaSpecificStiffness===19.65GPaρ16.18cWiththealternateapproach,thes
此文档下载收益归作者所有