春西交《弹性力学》在线作业满分答案（, spring west to elastic mechanics online homework, out of the answer）

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1、15春西交《弹性力学》在线作业满分答案（15,springWesttoelasticmechanicsonlinehomework,outoftheanswer）AustrianPeng15springWestsubmittedtothe"elasticmechanics"onlinehomeworkTotalscore:100testtime:-RadioexaminationJudgmentquestionRadioexaminationquestions(30questions,60points)1.

2、theelementofplanestrainisin()A.unidirectionalstressstateB.biaxialstressstateC.threeisastressstate,anditisaprincipalstressD.pureshearstressstateFullmarks:22.whichofthefollowingmaterialscanbeconsideredasisotropicmaterial?A.woodB.bambooC.concreteD.sandwichpla

3、teFullmarks:2Theequilibriumdifferentialequationsof3.planeproblemsrepresent()relations.A.stressandphysicalstrengthB.stressandsurfaceforceC.stressandstrainD.stressanddisplacementFullmarks:24.theexternalforcecharacteristicofplanestressproblemis()A.actsonlyont

4、heedgeoftheplateandparalleltothemiddleoftheplateTheB.actsverticallyonthepanelC.parallelmidfaceactsontheplateedgeandtheplatesurfaceTheD.actsontheplateandparalleltothepanelFullmarks:25.thecompatibilityequationexpressedbythestraincomponentisequivalenttoA.equi

5、libriumdifferentialequationB.geometricequationC.physicalequationD.geometricequationsandphysicalequationsFullmarks:2SixItis()thattheobjectisnotasingleconnecteddomainA.B.C.D.Fullmarks:2SevenA.B.C.D.Fullmarks:2EightTheringonlyundertheuniforminternalpressure()

6、A.B.C.D.Fullmarks:2NineIntheplanestrainproblem(takethelongitudinalastheZaxis)A.B.C.D.Fullmarks:2TenA.Aisthesame,BisthesameB.Aisnotthesame,BisnotthesameC.Athesame,BisnotthesameD.Aisnotthesame,BisthesameFullmarks:2ElevenA.B.C.D.Fullmarks:2TwelveA.B.C.D.Fullm

7、arks:213.inthefollowingmaterials,()areisotropicmaterials.A.bambooB.fiberreinforcedcompositeC.glassfiberreinforcedplasticD.asphaltFullmarks:214."perfectelastomer"means().Thestress-strainrelationofA.satisfiesHooke'slawThestress-strainrelationofB.isindependen

8、toftheloadingtimehistoryC.physicalrelationsarenonlinearelasticrelationsThestress-strainrelationofD.satisfiesthelinearelasticrelationFullmarks:215.forthesimplysupportedbeamunderuniformload,therelationbetweenth