资源描述：
《材料物理性能（physical properties of materials）》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、材料物理性能（Physicalpropertiesofmaterials）PhysicalpropertiesofMaterialsExercisesandSolutionsWuQishengYanchengInstituteofMaterialsEngineering2007,3Directory1mechanicalpropertiesofmaterials22thermalpropertiesofmaterials123Opticalpropertiesofmaterials174Materialconductivity205Magne
2、ticpropertiesofmaterials296Functionalconversionperformanceofmaterials371Mechanicalpropertiesofmaterials1-1diameterofaroundrodis2.5mm,25cmandsubjectedto4500Naxialtensileforce,ifthediameterisdrawnto2.4mm,andthevolumeoftheroundrodaftertensiledeformationisunchanged,thetruestres
3、s,truestrain,nominalstressandnominalstrainunderthistensileforceareobtained,andtheresultsarediscussedincomparison.Solution:AccordingtothefollowingtableTherelatedparametertableoftheroundbarbeforeandafterstretchingVolumev/mm3Diameterd/mmRoundareas/mm2Beforestretching1227.22.54
4、.909Afterstretching1227.22.44.524Theresultsareasfollows:Truestressisgreaterthannominalstressandtruestrainislessthannominalstrain.1-2Aspecimenlong40cm,wide10cm,thick1cm,underthestressofthe1000Npull,theyoungmodulusof3.5x109min,howmanycentimeterscanbestretched?Solution：1-3theY
5、oung'smodulusatroomtemperaturewas3.5x108min,Poisson'sratiois0.35,theshearmodulusandvolumemodulusofthematerialarecalculated.解：根据可知：The1-4testshowsthattheareaunderthestress-straincurveisproportionaltotheworkdonebythetensilespecimen.Certificate：1-5aceramicwithavolumepercentof9
6、5%$literal(e=$numbergpa)and5%oftheglassphase(E=$numbergpa),trytocalculateitsupperandlowermodulusofelasticity.Iftheceramiccontains5pores,theupperandlowermodulusofelasticityareestimated.Solution:MakeE1=380gpa,E2=84gpa,v1=0$number,V2=005.ThenthereWhentheceramiccontains5%pores,
7、the=.05-GenerationempiricalformulaE=e0(1-1.9p+0.9p2)canbeobtained,theupperandlowerlimitsoftheelasticmodulusrespectivelyinto$number.3GPAand$number1GPA.Therelationshipbetweenstressrelaxationandstraincreepandtimewasdrawnin1-6,andtheordinateexpressionsofT=0,t=t=arecalculatedres
8、pectively.Solution:TheMaxwellmodelcansimulatethestressrelaxationprocesswell:TheVoi
