第1題Undertheactionofload,thedeformationofthecomponentshouldnotexceedtheallowablerangeinengineering,thatis,ithastheabilitytoresistdeformation.Thisproblembelongsto?()AStiffnessproblemBStrengthproblemCStabilityproblem第2題Whataretherelationshipsbetweenthestrength,stiffness,andstabilityofacomponentandthematerialsused?()AMechanicalpropertiesBStateofstressCCharacteristicsofcomponentsystem第3題Whatisthebasictaskofmaterialmechanics?

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AStiffnessproblemBStrengthproblemCStabilityproblem正確答案：ABC第4題Thebasictasksofmaterialmechanicsarestrength,stiffness,andstability.第5題Whenexternalforcesactontheaxisoftherod,axialtensionandcompressiondeformationsoccur.第1題Theaxialforcediagramcanclearlyshowthedistributionlawofaxialforcealongtheinternalforcesofeachcrosssectionoftherod.第2題TheunitofelasticmodulusisPa.第3題Whentheaxialtensionandcompressiondeform,whichsectionhasthemaximumshearstress?AOnthe45-degreeobliquesectionBOnthe30-degreeobliquesectionCOnthe60-degreeobliquesectionDCrosssection第4題Whatstresscomponentswillbegeneratedonthecrosssectionduetoaxialtensionandcompressiondeformation?ANormalstressBShearstressCTotalstress第5題Whendeformedinaxialtensionandcompression,thestresscomponentoftheinclinedsectionincludes?ANormalstressBShearstress正確答案：ABChapter3TestQuestions第1題Theshearstressonthecrosssectionofthesolidcircularshaftisevenlydistributed.第2題Thedeformationcoordinationequationisrequiredforthetorsiondeformationofstaticallyindeterminateproblems.第3題Whenaroundshaftundergoestorsionaldeformation,relativerotationoccursbetweenthetwosectionsaroundtheshaftaxis,whatistheamountofdeformationcalled?ARelativetorsionangleBShearstrainCLineardisplacementDLinearstrain第4題Thesignoftorqueisspecifiedas?ALeft-handruleBRight-handruleofhelicityCPullispositiveDPressispositive第5題Whatfactorsareproportionaltotheshearstressatapointonthecrosssectionofasolidcircularshaft?ATorqueBDistancetothecenterCPolarmomentofinertiaDTorsionalsectioncoefficient正確答案：ABChapter4TestQuestions第1題Thefirstderivativeofthebendingmomentequationistheshearequation.第2題Whenthebeamcomponentundergoessmalldeformationintheelasticstate,itconformstotheplanehypothesis.第3題Shearstressisparalleltoshearforce.第4題Whatstresscomponentswillthebendingmomentinternalforceproduceonthecrosssectionduringbendingdeformation?AShearstressBNormalstressCTotalstressDCan'tjudge第5題Whataretheinternalforcesofbendingdeformation?AShearforceBBendingmomentCAxialforceDTorque正確答案：ABChapter5TestQuestions第1題Segment-by-segmentanalysisandsuperpositionmethodneedtobesplitatappropriatepartsofthecomponentandaddanimaginaryconstraint.第2題WuhanYangtzeRiverBridgebelongstostaticallyindeterminatestructure.第3題Thesolutionofstaticallyindeterminatebeamsneedstosupplementthedeformationcoordinationequation.第4題Whatistheaxisofthebeamafterbendingdeformation?（

）。AAxislineBNeutralaxisCFlexuralcurve第5題Whatconditionscanbeusedtodeterminethecoefficientsintheapproximatedifferentialequationofthedeflectioncurve?ABoundaryconditionBSmoothcontinuityconditionCBalancecondition正確答案：ABChapter6TestQuestions第1題Theactionlinesofallstresscomponentsareinthesameplane,whichcanbeconvertedintoaplanestressstate.第2題Theangleαbetweentheexternalnormaloftheobliquesectionandthex-axisispositivewhenitrotatescounterclockwise.第3題Thepointsonthestresscirclecorrespondone-to-onetothesurfacesonthestressstate.第4題WhenanI-shapedsectionbeamundergoesbendingdeformation,thecorrectexpressionofthenormalstressatthetopflangevertex,theintersectionpointbetweenthetopflangeandtheweb,theneutralaxis,theintersectionpointbetweenthebottomflangeandtheweb,andthefixedpointofthebottomflangeis?ATheyaredifferent.BThenormalstressattheapexoftheupperflangeisthesameasthatattheapexofthelowerflange.CThenormalstressattheneutralaxisisthesameasthenormalstressatthetopoftheupperflange.第5題Whatarethestresscomponentsontheinclinedsectionduringaxialtensionandcompressiondeformation?ANormalstresscomponentBShearstresscomponentCTotalstress正確答案：ABChapter7TestQuestions第1題Thethirdprincipalstressisthedifferencebetweenthefirstandthirdprincipalstresses.第2題Thethirdstrengththeoryismoreconservativethanthefourthstrengththeory.第3題Thetheoryofbrittlefracturecanbebasedonthefirststrengththeory.第4題Whatisthefirststrengththeory?AMaximumtensilestresstheoryBMaximumshearstresstheoryCShapechangeenergydensitytheory第5題Whenthethirdprincipalstressofplasticmaterialislessthan0,whichstrengththeoryshouldbeused?AFirststrengththeoryBSecondstrengththeoryCThirdstrengththeoryDFourthstrengththeory正確答案：CDChapter8Testquestions第1題Whenarodmemberundergoestwoormorebasicdeformationssimultaneouslyunderexternalforces,itcanbereferredtoasacombineddeformation.第2題Theskewbendingcanbedecomposedintothecombinationoftwosymmetricalcross-sectionbendingdeformations.第3題Thecombinationofbendingandtwistingdeformationscanchangethepositionoftheneutralaxiswhenonlybendingdeformationoccurs.第4題Howdoestheneutralaxischangeonthecrosssectionduringthecombineddeformationoftensionandbending?ADeflecttowardsthecompressedsideBDeviatetowardsthetensionsideCThepositionremainsunchanged第5題Whentheshaftcomponentundergoescombinedbendingandtorsiondeformation,whereisthedangerouspoint?AThetensilezonefurthestawayfromtheneutralaxisBThecompressivezonefurthestawayfromtheneutral