MOOC Mechanics of Materials （《材料力學(xué)》全英文）-北京理工大學(xué) 中國大學(xué)慕課答案

MOOCMechanicsofMaterials（《材料力學(xué)》全英文）-北京理工大學(xué)中國大學(xué)慕課答案HomeworkassignmentsforChapter1ThesmallquizforChapter11、問題：Mechanicsofmaterialsisastudyoftherelationshipbetweenthe()appliedtoabodyandthe()and()causedbythe()withinthebody.選項(xiàng)：A、loads,stress,strain,loadsB、externalloads,stress,strain,internalloadsC、internalloads,deformation,force,externalloadsD、externalloads,force,deformation,internalloads正確答案:【externalloads,stress,strain,internalloads】2、問題：Lineardistributedloadingsproducea()havingamagnitudeequaltothe(),andhavingalocationthatpassesthroughthe().選項(xiàng)：A、resultantforce,externalforce,centeroftheareaB、force,externalforce,centroidofthisareaC、resultantforce,areaundertheloaddiagram,centroidofthisareaD、resultantforce,externalforce,centroidofthisarea正確答案:【resultantforce,areaundertheloaddiagram,centroidofthisarea】3、問題：Asupportproduces()inaparticulardirectiononitsattachedmemberifitprevents()ofthememberinthatdirection,anditproduces()onthememberifitprevents().選項(xiàng)：A、anexternalforce,translation,anexternalcouplemoment,rotationB、aninternalforce,translation,aninternalcouplemoment,rotationC、aninternalforce,movement,acouplemoment,translationD、anexternalforce,translation,aninternalcouplemoment,translation正確答案:【anexternalforce,translation,anexternalcouplemoment,rotation】4、問題：Themethodofsectionsisusedtodeterminethe()actingonthesurfaceofthesectionedbody.Ingeneral,theseresultantsconsistofa(),(),(),andbendingmoment.選項(xiàng)：A、resultantloadings,forcealongx,aforcealongyaxis,torsionalmomentB、resultantloadings,normalforce,shearforce,externalcoupleC、externalresultantloadings,normalforce,shearforce,torsionalmomentD、internalresultantloadings,normalforce,shearforce,torsionalmoment正確答案:【internalresultantloadings,normalforce,shearforce,torsionalmoment】5、問題：Theintensityofthe()atapointinthebodyisreferredtoasstress.Stressisthe()valueofforceperunitarea,astheareaapproaches().Forthisdefinition,thematerialisconsideredtobe()and().選項(xiàng)：A、internalforce,limiting,zero,continuous,cohesiveB、externalforce,limiting,aspecificvalue,continuous,cohesiveC、internalforce,afixed,zero,continuous,cohesive.D、externalforce,limiting,zero,discontinuous,linear正確答案:【internalforce,limiting,zero,continuous,cohesive】6、問題：Whenaprismaticbarismadefrom()and()material,andissubjectedtoanaxialforceactingthroughthe()ofthecross-sectionalarea,thenthecenterregionofthebarwilldeform().Asaresult,thematerialwillbesubjectedonlyto().Thisstressis()oraveragedoverthecross-sectionalarea.選項(xiàng)：A、unhomogeneous,anisotropic,centroid,uniformly,normalstress,uniformB、homogeneous,isotropic,centroid,uniformly,normalstress,uniformC、homogeneous,anisotropic,centroid,uniformly,shearstress,uniformD、homogeneous,isotropic,centroid,uniformly,shearstress,nonuniform正確答案:【homogeneous,isotropic,centroid,uniformly,normalstress,uniform】7、問題：Whenshearstressactsonaplane,then()ofavolumeelementofmaterialatapointontheplanerequiresassociated()ofthe()actonthreeadjacentsidesoftheelement.選項(xiàng)：A、equilibrium,normalstress,samemagnitudeB、equilibrium,shearstress,samemagnitudeC、equilibrium,normalstress,sameorientationD、equilibrium,normalstress,sameorientation正確答案:【equilibrium,shearstress,samemagnitude】8、問題：Designofamemberforstrengthisbasedonselectingan()thatwillenableittosafelysupportitsintendedload.Sincetherearemanyunknownfactorsthatcaninfluencetheactualstressinamember,thendependingupontheintendeduseofthemember,()isappliedtoobtainthe()themembercansupport.選項(xiàng)：A、allowablestress,afactorofsafety,allowableloadB、allowableforce,afactorofsafety,allowableloadC、allowableforce,afactor,allowableloadD、allowablestress,afactor,allowableload正確答案:【allowablestress,afactorofsafety,allowableload】HomeworkassignmentforChapter2AsmallquizforChapter21、問題：()isameasureperunitlengthoftheelongationorcontractionofasmalllinesegmentinthebody,whereas()isameasureofthechangein()thatoccursbetweentwosmalllinesegmentsthatareoriginally()tooneanother.選項(xiàng)：A、Normalstrain,shearstrain,angle,perpendicularB、Shearstrain,normalstrain,angle,perpendicularC、Normalstrain,shearstrain,length,perpendicularD、Shearstrain,normalstrain,length,perpendicular正確答案:【Normalstrain,shearstrain,angle,perpendicular】2、問題：Thestateofstrainatapointischaracterizedby()straincomponents:()normalstrainsand()shearstrains.Thesecomponentsdependupontheoriginal()ofthelinesegmentsandtheir()inthebody.選項(xiàng)：A、nine,three,six,orientation,locationB、six,three,three,orientation,locationC、six,three,three,orientation,lengthD、nine,three,six,orientation,length正確答案:【six,three,three,orientation,location】3、問題：選項(xiàng)：A、2.39mm(downward),0.0119mm/mmB、2.39m(downward),0.0119mm/mmC、2.39mm(upward),0.119mm/mmD、2.39mm(upward),0.0119mm/mm正確答案:【2.39mm(downward),0.0119mm/mm】5、問題：TherigidbeamissupportedbyapinatAandwiresBDandCE.IfthedistributedloadcausestheendCtobedisplaced20mmdownward,thenormalstraindevelopedinwiresDBis()andinwireCEis().選項(xiàng)：A、0.00266mm/mm,0.001mm/mmB、0.00533mm/mm,0.005mm/mmC、0.00533mm/mm,0.01mm/mmD、0.00266mm/mm,0.005mm/mm正確答案:【0.00533mm/mm,0.01mm/mm】HomeworkassignmentsgiveninthetextbookforChapter3AsmallquizforChapter31、問題：Thepointof()onthestress-straindiagramrepresentstheproportionallimitandtheultimatestress.選項(xiàng)：A、A,BB、B,CC、A,DD、B,E正確答案:【A,D】2、問題：Thematerialforthe50-mm-longspecimenhasthestress–straindiagramshown.IfP=100kNmtheelongationofthespecimenis().選項(xiàng)：A、0.0796mmB、0.001592mmC、318.31MPaD、0.01592mm正確答案:【0.0796mm】3、問題：A100-mmlongrodhasadiameterof15mm.Ifanaxialtensileloadof20kNisappliedtoit,thechangeinitsdiameteris().E=70GPa,=0.35.選項(xiàng)：A、B、C、D、正確答案:【】4、問題：IftheelongationofwireBCis0.3mmaftertheforcePisapplied,themagnitudeofPis().ThewireisA-36steelandhasadiameterof3mm.選項(xiàng)：A、942NB、628NC、1256ND、314N正確答案:【942N】5、問題：A150-mmlongrodhasadiameterof10mm.Ifanaxialtensileloadof150kNisapplied,itschangeoflengthis().E=200GPa.Itisassumedthatmaterialbehaviorislinearelastic.選項(xiàng)：A、0.2829mmB、1.4324mmC、0.6366mmD、0.4244正確答案:【1.4324mm】6、問題：A20-mm-diameterbrassrodhasamodulusofelasticityofE=100GPaIfitis4mlongandsubjectedtoanaxialtensileloadof12kN,itselongationis()選項(xiàng)：A、1.5279mmB、6.1115mmC、3.06mmD、0.7639mm正確答案:【1.5279mm】7、問題：Asolidcircularrodthatis600mmlongand20mmindiameterissubjectedtoanaxialforceofP=50KN.Theelongationoftherodis,anditsdiameterbecomes=19.9837mm.themodulusofelasticityofthematerialis().Assumethatthematerialdoesnotyield.選項(xiàng)：A、68.2GPaB、136.4GPaC、34.1GPaD、200GPa正確答案:【68.2GPa】8、問題：A20-mm-wideblockisfirmlybondedtorigidplatesatitstopandbottom.WhentheforcePisappliedtheblockdeformsintotheshapeshownbythedashedline.Theblock'smaterialhasshearmodulusG=52GPa.Assumethatthematerialdoesnotyieldandusesmallangleanalysis.ThemagnitudeofPis().選項(xiàng)：A、460KNB、130KNC、260KND、520KN正確答案:【520KN】HomeworkassignmentsgiveninthetextbookforChapter4.1HomeworkassignmentsgiveninthetextbookforChapter4.2AsmallquizforChapter41、問題：Saint-Venant'sprinciplestatesthatboththelocalized()whichoccurwithintheregionsofloadaplicationoratthesupportstendtoevenoutatadistancesufficientlyremovedfromtheseregions.選項(xiàng)：A、deformationB、deformationandstressC、stressD、stressandstrain正確答案:【deformationandstress】2、問題：SinceHooke'shasbeenusedinthedevelopmentofthedisplacementequations,itisimportantthattheloadsdonotcause()ofthematerialandthatthematerialis()andbehavesina()manner選項(xiàng)：A、yielding;homogeneous;linear-elasticB、plasticdeformation;isotropic;linear-elasticC、yielding;isotropic;linearD、yielding;homogeneous;elastic正確答案:【yielding;homogeneous;linear-elastic】3、問題：Superpositionrequiresthattheloadingbelinearlyrelatedtothe()or(),andtheloadingdoesnotsignificantlychangethe()geometryofthemember.選項(xiàng)：A、stress;displacement;originalB、deformation;strain;originalC、stress;strain;currentD、stress;strain;original正確答案:【stress;displacement;original】4、問題：Amemberisstatically()iftheequationsofequilibriumare()todetermine()onamember.選項(xiàng)：A、indeterminate;notsufficient;theexternalforcesB、determinate;sufficient;thereactionsC、indeterminate;sufficient;theinternalforcesD、determinate;notsufficient;thereactions正確答案:【indeterminate;notsufficient;theexternalforces】5、問題：()specifythedisplacementconstraintsthatoccuratthe()orotherspointsonamember.選項(xiàng)：A、Compatibilityconditions;supportsB、Equilibriumequations;supportsC、Equilibriumequations;pointthattheexternalloadisappliedD、Compatibilityconditions;pointthattheexternalloadisapplied正確答案:【Compatibilityconditions;supports】6、問題：()occuratsectionswherethecross-secitonalareasuddenly().選項(xiàng)：A、Stressconcentrations;changesB、Stressconcentrations;decreasesC、Stressconcentrations;increasesD、Strainconcentrations;changes正確答案:【Stressconcentrations;changes】7、問題：AstressconcentrationfactorKcanbedeterminedthroughexperimentandisonlyafunctionofthe()ofthespecimen.選項(xiàng)：A、materialpropertiesB、geometryC、boundarycondtionsD、externalloadings正確答案:【geometry】8、問題：Thestressconcentrationina()specimenthatissubjecttoastaticloadingwillnothavetobeconsideredindesign;however,ifthematerialis(),orsubjectedto()loadings,thenstressconcentrationsbecomesimportant.選項(xiàng)：A、ductile;brittle;fatigueB、brittle;ductile;staticC、ductile;brittle;staticD、ductile;brittle;thermal正確答案:【ductile;brittle;fatigue】9、問題：Thermalstresscanoccurina()withtemperaturevariation.選項(xiàng)：A、staticallyindeterminatememberB、anyloadedmemberC、staticallydeterminatememberD、staticallyindeterminatememberwithhomogeneousandisotropicmaterialproperty正確答案:【staticallyindeterminatemember】10、問題：Thedisplacementofonepointontheaxiallyloadedmemberrelativetotheotherpointisdeterminedby選項(xiàng)：,whichcanbeusedforthe()material.A、homogeneousandisotropicB、homogeneous,isotrpicandlinear-elasticC、anisotropicandlinear-elasticD、homogeneousandlinear-elastic正確答案:【homogeneous,isotrpicandlinear-elastic】11、問題：The30-mm-diameterA-36steelrodissubjectedtotheloadingshown.ThedisplacementofendAwithrespecttoendCis().選項(xiàng)：A、-0.772mmB、0.772mmC、-0.858mmD、-0.686正確答案:【-0.858mm】12、問題：The20-mm-diameter2014-T6aluminumrodissubjectedtotheuniformdistributedaxialload.ThedisplacementofendAis().選項(xiàng)：A、0.882mmB、0.529mmC、-0.539mmD、0.705正確答案:【0.882mm】13、問題：Thetwopipesaremadeofthesamematerialandareconnectedasshown.Ifthecross-sectionalareaofBCisAandthatofCDis2A,ThereactionsatBandDwhenaforcePisappliedatthejunctionCare().選項(xiàng)：A、1/3P,-2/3PB、2/3P,1/2PC、1/3P,1/2PD、-2/3P,1/3P正確答案:【1/3P,-2/3P】14、問題：Thethreesuspenderbarsaremadeofthesamematerialandhaveequalcross-sectionalareasA.TheaveragenormalstressinthebarABis()iftherigidbeamACEissubjectedtotheforceP.選項(xiàng)：A、(5P)/(12A)B、(2P)/(3A)C、P/(2A)D、(7P)/(12A)正確答案:【(7P)/(12A)】15、問題：ThewiresABandACaremadeofsteel,andwireADismadeofcopper.Beforethe200lbforceisapplied,ABandACareeach60in.longandADis40in.long.Ifthetemperatureisincreasedby80degreeF.TheforceinthewireACneededtosupporttheloadis().,.,.Eachwirehasacross-sectionalareaof0.0123in.選項(xiàng)：A、28.86lbB、10.05lbC、15.38lbD、20.67lb正確答案:【28.86lb】HomeworkassignmentsgiveninthetextbookforChapter5_part1HomeworkassignmentsgiveninthetextbookforChapter5_part2AsmallquizforChapter51、問題：Whenashafthavingacircularcrosssectionissubjectedtoatorque,thecrosssectionremainsplanewhileradiallinesrotate.Thiscausesa()withinthematerialthatvaries()alongany()line.選項(xiàng)：A、shearstrain;linearly;radialB、normalstrain;linearly;radialC、shearstrain;nonlinearly;radialD、shearstrain;nonlinearly;longitudinal正確答案:【shearstrain;linearly;radial】2、問題：Dueto()ofshear,thelinearshearstressdistributionwithintheplaneofthecrosssectionisalsodistributedalonganadjacent()oftheshaft選項(xiàng)：A、complementaryproperty;axialplaneB、equilibriumequation;axialplaneC、compatibilitycondition;axialplaneD、lineardistribution;axialplane正確答案:【complementaryproperty;axialplane】3、問題：Thetorsionformulaisbasedontherequirementthatthe()torqueonthecrosssectionisequaltothetorqueproducedbythe()shearstressdistributionaboutthe()oftheshaft.選項(xiàng)：A、resultant;linear;longitudinalaxisB、resultant;nonlinear;longitudinalaxisC、external;linear;radiallineD、resultant;nonlinear;radialline正確答案:【resultant;linear;longitudinalaxis】4、問題：Itisnecessarythattheshaftortubehavea()crosssectionanditismadeof()materialwhichhas()behavior.選項(xiàng)：A、circular;homogeneous;linear-elasticB、circular;anisotropic;linear-elasticC、circular;isotropic;linear-elasticD、circular;homogeneous;linear正確答案:【circular;homogeneous;linear-elastic】5、問題：Itisimportantforthedevelopmentoftheformulafortheangleoftwist,whichisthattheappliedtorquesdonotcause()ofthematerialandthatthematerialis()andbehavesina()manner選項(xiàng)：A、yielding;homogeneous;linear-elasticB、plasticdeformation;inhomogeneous;linear-elasticC、yielding;anisotropic;linear-elasticD、yielding;homogeneous;elastic正確答案:【yielding;homogeneous;linear-elastic】6、問題：Thesolidcircularshaftissubjectedtoaninternaltorqueof.TheshearstressdevelopedatpointsAandBare()and(),respectively.選項(xiàng)：A、49.7MPa,37.3MPaB、79.58MPa,59.68MPaC、49700Pa,37300PaD、79580Pa,59680Pa正確答案:【79.58MPa,59.68MPa】7、問題：TheshearstressdevelopedatpointAonthesurfaceoftheshaftis().Theshafthasaradiusof60mm.選項(xiàng)：A、7.42MPaB、20.37MPaC、39.79MPaD、11.79MPa正確答案:【11.79MPa】8、問題：The40-mm-diameterA-36steelshaftissubjectedtothetorquesshown.TheangleoftwistofendAwithrespecttoCis().TheshearmodulusofA-36steelis75GPa.選項(xiàng)：A、0.00838B、-0.00174C、-0.00838D、-0.0424正確答案:【-0.0424】9、問題：Aseriesofgearsaremountedonthe60-mmdiameterA-36steelshaft.TheangleoftwistofgearBrelativetogearAis().TheshearmodulusofA-36steelis75GPa.選項(xiàng)：A、0.0021B、0.0106C、-0.0106D、0.0335正確答案:【0.0021】10、問題：Thehollow6061-T6aluminumshafthasanouterandinnerradiusofco60mmandci20mm,respectively.TheangleoftwistofendAis().TheflexiblesupportatBhasatorsionalstiffnessofaluminumis26GPa.Theshearmodulusof6061-T6選項(xiàng)：A、0.07111B、0.1126C、0.0385D、0.0352正確答案:【0.0352】HomeworkassignmentforChapter6.1HomeworkassignmentforChapter6.2AsmallquizforChapter61、問題：Beamsare()straightmembersthatcarryloads()theirlongitudinalaxis.選項(xiàng)：A、short,perpendiculartoB、long,perpendiculartoC、short,paralleltoD、long,parallelto正確答案:【long,perpendicularto】2、問題：Inordertoproperlydesignabeam,itisimporttoknowthevariationof()and()alongitsaxisinordertofindthepointswherethesevaluesareamaximum.選項(xiàng)：A、theaxialforce,torsionalmomentB、theaxialforce,bendingmomentC、theshear,torsionalmomentD、theshear,bendingmoment正確答案:【theshear,bendingmoment】3、問題：Althoughthechoiceofasignconventionforabeamis(),wewillusetheoneoftenusedinengineeringpractice.Thepositivedirectionsareasfollows:thedistributedloadacts()onthebeam;theinternalshearforcecausesa()rotationofthebeamsegmentonwhichitacts;andtheinternalmomentcauses()inthetopfibersofthesegments.選項(xiàng)：A、specified;downward;clockwise;compressionB、arbitrary;downward;clockwise;compressionC、arbitrary;upward;counterclockwise;compressionD、arbitrary;downward;clockwise;tension正確答案:【arbitrary;downward;clockwise;compression】4、問題：Thecrosssectionofastraightbeamremainsplanewhenthebeamdeformsduetobending.Thiscauses()ononesideofthebeamand()ontheotherside.Theneutralaxisissubjectedto().選項(xiàng)：A、tensilestress;compressivestress;zerostressB、compressivestress;tensilestress;maximumnormalstressC、shearstress;normalstress;zerostressD、normalstress;shearstress;zerostress正確答案:【tensilestress;compressivestress;zerostress】5、問題：Duetothepurebendingdeformation,thelongitudinal()strainvaries()from()attheneutralaxistoamaximumattheouterfibersofthebeam.選項(xiàng)：A、normal;linearly;zeroB、shear;nonlinearly;zeroC、normal;linearly;maximumD、shear;nonlinearly;zero正確答案:【normal;linearly;zero】6、問題：Providedthematerialis()and(),duetothepurebendingdeformation,thestressvariesina()fashiononthecrosssection.選項(xiàng)：A、homogeneous;linearelastic;linearB、nonhomogeneous;linearelastic;linearC、nonhomogeneous;linearelastic;nonlinearD、homogeneous;linearelastic;nonlinear正確答案:【homogeneous;linearelastic;linear】7、問題：Forlinear-elasticmaterialtheneutralaxispassesthroughthe()ofthecross-sectionalarea.Thisconclusionisbasedonthefactthattheresultant()actingonthecrosssectionmustbe().選項(xiàng)：A、centroid;axialnormalforce;zeroB、centroid;shearforce;zeroC、centroid;bendingmoment;zeroD、centroid;axialnormalforce;maximum正確答案:【centroid;axialnormalforce;zero】8、問題：Theflexureformulaisbasedontherequirementthatthe()onthecrosssectionisequaltothe()producedbythe()distributionabouttheneutralaxis.選項(xiàng)：A、resultantmoment;moment;linearnormalstressB、resultantnormalforce;force;linearnormalstressC、resultantmoment;moment;nonlinearnormalstressD、resultantmoment;moment;nonlinearshearstress正確答案:【resultantmoment;moment;linearnormalstress】9、問題：Theflexureformulacanbeappliedonlywhenbendingoccursaboutaxesthatrepresenttheprincipalaxesofinertiaforthecrosssection.Theseaxeshavetheiroriginat()andareorientatedalong(),ifthereisone,andperpendiculartoit.選項(xiàng)：A、thecentroid;anaxisofsymmetryB、arbitrarypoint;anaxisofsymmetryC、thecentroid;anarbitraryaxisD、arbitrarypoint;anarbitraryaxis正確答案:【thecentroid;anaxisofsymmetry】10、問題：Ifthemomentisappliedaboutsomearbitaryaxis,thenthemomentmustberesolvedintocomponentsalongeachof(),andthestressatapointisdeterminedby()ofthestresscausedbyeachofthemomentcomponents.選項(xiàng)：A、theprincipalaxes,superpositionB、perpendicularaxes,decompositionC、arbitraryaxes,superpositionD、theprincipalaxes,decomposition正確答案:【theprincipalaxes,superposition】11、問題：IfthebeamissubjectedtoabendingmomentofM=16kN.m,themaximumbendingstressinthebeamis().選項(xiàng)：A、48.6MPaB、74.5MPaC、59.6MPaD、85.4MPa正確答案:【59.6MPa】12、問題：IfthebeamissubjectedtoabendingmomentofM=15kN.m,themaximumbendingstressinthebeamis().選項(xiàng)：A、5.88MPaB、3.92MPaC、1.96MPaD、7.84正確答案:【5.88MPa】13、問題：IfthebeamissubjectedtoabendingmomentofM=10kN.m,thebendingstressdevelopedatpointAis().選項(xiàng)：A、1.98MPa(Tension)B、5.94MPa(Compression)C、3.96MPa(Compression)D、3.96MPa(Tension)正確答案:【3.96MPa(Tension)】14、問題：ThebendingstressdevelopedatcornersAis().選項(xiàng)：A、30MPa(Tension)B、30MPa(Compression)C、42MPa(Tension)D、42MPa(Compression)正確答案:【42MPa(Tension)】15、問題：Themaximumstressinthebeam'scrosssectionis().選項(xiàng)：A、40.4psiB、64.6psiC、48.0psiD、107.9psi正確答案:【64.6psi】HomeworkassignmentforChapter7_part1HomeworkassignmentforChapter7_part2AsmallquizforChapter71、問題：Shearforcesinbeamscause()shear-straindistributionsoverthecross-section,causingitto().選項(xiàng)：A、nonlinear,warpB、linear,warpC、constant,rotateD、linear,rotate正確答案:【nonlinear,warp】2、問題：Duetothe()propertyofshearstress,theshearstressdevelopedinabeamactsonboththecrosssectionandon()planes.選項(xiàng)：A、complementary,longitudinalB、complementary,transverseC、nonlinear,longitudinalD、linear,longitudinal正確答案:【complementary,longitudinal】3、問題：Theshearformulawasderivedbyconsidering()equilibriumofthelongitudinalshearstressand()distributionactingonaportionofadifferentialsegmentofthebeam.選項(xiàng)：A、horizontalforce,bending-stressB、transverseforce,bending-stressC、horizontalforce,transverseshear-stressD、transverseforce,transverseshear-stress正確答案:【horizontalforce,bending-stress】4、問題：Theshearformulaistobeusedonstrainghtprismaticmembersmadeof()materialthathas()behavior.Also,theinternalresultantshearforcemustbedirectedalonganaxisof()ofthecross-sectionalarea.選項(xiàng)：A、homogeneous,linear-elastic,symmetryB、homogeneous,elastic,asymmetryC、unhomogeneous,linear,symmetryD、homogeneous,linear-inelastic,symmetry正確答案:【homogeneous,linear-elastic,symmetry】5、問題：Forabeamhavingarectangularcrosssection,theshearstressvaries()with().Themaximumshearstressisalongthe()axis.選項(xiàng)：A、parabolically,depth,neutralB、linear,depth,neutralC、parabolically,depth,longitudinalD、linear,depth,longitudinal正確答案:【parabolically,depth,neutral】6、問題：Shearflowisameasureoftheforceperunitlengthalonga()axisofabeam.Thisvalueisfoundfromthe()andisusedtodeterminetheshearforcedevelopedinfastenersandgluethatholdsthevarioussegmentsofabeamtogether.選項(xiàng)：A、longitudinal,shearformulaB、transverse,shearformulaC、longitudinal,flexureformulaD、transverse,flexureformula正確答案:【longitudinal,shearformula】7、問題：Ifamemberismadefromsegmentshavingthinwallsunderinternalshearforce,onlytheshearflow()tothewallsofthememberisimportant.Theshearflowvaries()alongsegmentsthatare()thedirectionoftheshearforceV.選項(xiàng)：A、parallelto,linear,perpendiculartoB、perpendicularto,linear,paralleltoC、parallelto,parabolically,perpendiculartoD、perpendicularto,parabolically,parallelto正確答案:【parallelto,linear,perpendicularto】8、問題：Theshearflowinthethin-walledmembervaries()alongthesegmentsthatare()or()thedirectionoftheshearforceV.Onthecrosssection,theshearflowsalongthesegmentssothatitcontributestotheshearforceVyetsatisfieshorizontalandvertical().選項(xiàng)：A、parabolically,inclined,parallelto,forceequilibriumB、linearly,inclined,parallelto,forceequilibriumC、linearly,inclined,parallelto,momentequilibriumD、parabolically,perpendicularto,parallelto,forceequilibrium正確答案:【parabolically,inclined,parallelto,forceequilibrium】9、問題：IfthebeamissubjectedtoashearforceofV=80kN,determinetheshearstressdevelopedatpointA.RepresentthestateofstressatAonavolumeelement.選項(xiàng)：A、14.7MPaB、18.4MPaC、12.6MPaD、22.4MPa正確答案:【14.7MPa】10、問題：Determinetheabsolutemaximumshearstressdevelopedinthebeam.選項(xiàng)：A、187.5psiB、1125psiC、375psiD、750psi正確答案:【750psi】11、問題：IfthebeamissubjectedtoashearforceofV=10kN,determinethemaximumshearstressdevelopedinthebeam.選項(xiàng)：A、1.2MPaB、0.6MPaC、1.8MPaD、2.4MPa正確答案:【0.6MPa】12、問題：Thetwoidenticalboardsareboltedtogethertoformthebeam.Determinethemaximumallowablespacingsoftheboltstothenearestmmifeachbolthasashearstrengthof30kN.ThebeamissubjectedtoashearforceofV=40KN.選項(xiàng)：A、80mmB、200mmC、100mmD、150mm正確答案:【200mm】13、問題：Twoidentical20-mmthickplatesareboltedtothetopandbottomflangetoformthebuilt-upbeam.IfthebeamissubjectedtoashearforceofV=200KNdeterminetheallowablemaximumspacingsoftheboltstothenearestmm.Eachbolthasashearstrengthof20kN.選項(xiàng)：A、106mmB、90mmC、96mmD、86mm正確答案:【96mm】HomeworkassignmentsforChapter8HomeworkassignmentsforChapter9AquizforChapter91、問題：Thegeneralstateofplanestressatapointisrepresentedbyacombinationoftwo()stresscomponentsandone()stresscomponent,whichacton()facesoftheelement.選項(xiàng)：A、normal,shear,fourB、shear,normal,sixC、normal,shear,sixD、shear,normal,four正確答案:【normal,shear,four】2、問題：Thestateofplanestressatthepointisuniquelyrepresentedby()stresscompomentsactiongonanelementthathas()atthepoint.選項(xiàng)：A、three,aspecificorientationB、four,aspecificorientationC、three,anyorientationD、six,aspecificorientation正確答案:【three,aspecificorientation】3、問題：Theprincipalstressesrepresentthe()atthepoint.選項(xiàng)：A、maximumandminimumnormalstressB、maximumandminimumshearstressC、maximumnormalandminimumshearstressD、maximumshearandminimumnormalstress正確答案:【maximumandminimumnormalstress】4、問題：Whenthestateofstressisrepresentedbythe(),noshearstresswillactontheelement.Thestateofstresscanalsoberepresentedintermsofthemaximumin-planeshearstress.Inthiscase,()willalsoactontheelement.選項(xiàng)：A、theprincipalstresses,anaveragenormalstressB、themaximumin-planeshearstress,anaveragenormalstressC、anaveragenormalstress,theprincipalstressesD、themaximumin-planeshearstress,theprincipalstresses正確答案:【theprincipalstresses,anaveragenormalstress】5、問題：Themaximumrepresentingthemaximumin-planeshearstresswiththeassociated()isoriented()fromtheelementrepresentingtheprincipalstresses.選項(xiàng)：A、averagenormalstresses,45degreeB、principalstresses,45degreeC、averagenormalstresses,90degreeD、principalstresses,180degree正確答案:【averagenormalstresses,45degree】6、問題：Thegeneralthree-dimensionalstateofstressatapointcanberepresentedbyanelementorientedsothatonly()actonit.選項(xiàng)：A、threeprincipalstressesB、twoprincipalstressesandoneshearstressC、sixprincipalstressesD、threeabsolutemaximumshearstresses正確答案:【threeprincipalstresses】7、問題：Ifthein-planeprincipalstressesbothhavethesamesign,theabsolutemaximumshearstresswilloccur()andhasavalueof()選項(xiàng)：A、out-of-plane,B、in-plane,/2/2C、out-of-plane,/2D、in-plane,/2正確答案:【out-of-plane,/2】8、問題：Ifthein-planeprincipalstressesareofoppositesigns,thentheabsolutemaximumshearstressequals(),thatis().選項(xiàng)：A、themaximumin-planeshearstress,B、themaximumin-planeshearstress,C、themaximumprincipalstress,/2/2/2D、themaximumin-planeshearstress,正確答案:【themaximumin-planeshearstress,/2】9、問題：ThenormalstressandshearstressactingontheinclinedplaneABis()kPaand()kPa,respectively.選項(xiàng)：A、125,217B、150,259.81C、-150,259.81D、-125,217正確答案:【150,259.8