【MOOC】Foundations of Solid Mechanics-東南大學(xué) 中國大學(xué)慕課MOOC答案

【MOOC】FoundationsofSolidMechanics-東南大學(xué)中國大學(xué)慕課MOOC答案QuizforChapter11、【單選題】Inthehistoryofsolidmechanics,whofirstpointedoutthatabodyisdeformedsubjecttotheactionofaforce?本題答案：【RobertHooke】2、【多選題】Hassolidmechanicsfounditsapplicationsinwhichofthefollowingengineeringareas?本題答案：【Aeronauticalandaerospaceengineering#Mechanicalengineering#Materialsscienceandengineering#Civilengineering】3、【判斷題】Inthehistoryofsolidmechanics,SirLordKelvinfirstdemonstratedthattorsionalmomentsactingattheedgesofplatescouldbedecomposedintoshearingforces.本題答案：【正確】4、【填空題】Elasticityanalysisisprimarilyconcernedwiththedeterminationofstress,strainand()inelasticsolids.本題答案：【displacement##%_YZPRLFH_%##displacements】QuizforChapter21、【單選題】Inindicialnotation,noindexcanappearmorethan()timesinasinglealgebraicterm.本題答案：【2】2、【多選題】Examplesofscalarsinclude本題答案：【densityofmaterials#mass#temperature】3、【多選題】Howmuchisthedeterminantofthetransformationmatrixbetweendifferentcoordinatesystems?本題答案：【1#-1】4、【判斷題】Thosevectorsandmatricesthatsatisfythetransformationrulesbetweencoordinatesarecalledtensors.本題答案：【正確】5、【判斷題】Wecanwrite本題答案：【錯誤】6、【填空題】Inordertofurthersimplifymathematicalexpressions,()firstintroducedthesummationconvention.本題答案：【Einstein】QuizforChapter31、【單選題】Forthegnenralthreeprincipalstresses,whichofthefollowingrelationiscorrect?本題答案：【】2、【單選題】Whichofthefollowingmodeisnonlinear?本題答案：【Shearduetotransverseload】3、【多選題】WhatarebasicdeformationmodesinMechanicsofMaterials?本題答案：【Simplebeambending#Shearduetotransverseload#Simpletension#Simpletorsion】4、【多選題】Forageneralstressstate,whichofthefollowingrelationsarecorrect?本題答案：【##】5、【判斷題】Fromthenormalstressformulaequationinpurebendingcase,thelargestnormalstresswillbeeitheronthetoporonthebottomofthebeamonthecrosssection,wherethemomentislargest.本題答案：【正確】6、【判斷題】ThesethreeI1I2andI3inthecharacteristiccubicequationwillbechangingwiththecoordinatetransformation.本題答案：【錯誤】7、【填空題】Forprinciplestressstates,wedonothave()component.本題答案：【shearstress】8、【填空題】Bystresswemeantheintensityof()force.本題答案：【aninternal##%_YZPRLFH_%##internal】QuizforChapter41、【單選題】Whichofthefollowingmaterialconstnatisnotphysicallyinterpretable?本題答案：【Lameconstant】2、【單選題】Whichofthefollowingstatementisnotcorrecttodescribeahomogeneousmaterial?本題答案：【Itcancontainsomediscontinuity.】3、【多選題】Whichofthefollowingmaterialsaretypicallyanisotropic?本題答案：【Composites#Woods#Aggregates#Bones】4、【多選題】Foranisotropicelasticmaterial,whichofthefollowingrelationsarecorrect?本題答案：【##】5、【判斷題】Thehomogenousmaterialcanbeanisotropic.本題答案：【正確】6、【判斷題】Theelasticmaterialsalwaysbehavelinearly.本題答案：【錯誤】7、【填空題】Weonlyhavetodealwith()materialconstantsforisotropicmaterials.本題答案：【two##%_YZPRLFH_%##2】8、【填空題】Inlinearmaterials,thestressandstrainwillbe()toeachother.本題答案：【proportional】QuizforChapter51、【單選題】Forpuretensionwithbeingtheonlynonzeroterm,whichofthefollowingcomponentfordeviatoricstressisnotcorrect?本題答案：【】2、【單選題】Whichofthefollowingstatementisnotcorrectinthegeneralcase?本題答案：【】3、【多選題】Wecanhavethegeneralstressstatedecompositionas本題答案：【hydrostaticstressstate#deviatoricstressstate】4、【多選題】Whichofthefollowingcorrespondingstrainenergydensitiescontainonlyoneterm?本題答案：【Uniaxialstressstate#Pureshearstate】5、【判斷題】Thestrainenergywillbeworkdonebyinternalforces.本題答案：【正確】6、【判斷題】Thedeviatoricstressstateisresponsibleforthevolumechange.本題答案：【錯誤】7、【填空題】Bydefinition{}issimplystrainenergyperunitvolume.本題答案：【thestrainenergydensity##%_YZPRLFH_%##strainenergydensity】8、【填空題】{}representsthepartoftheenergythatiscomplementarytothestrainenergy本題答案：【complementaryenergy##%_YZPRLFH_%##Complementaryenergy】QuizforChapter61、【單選題】Whichofthefollowingtypesofboundaryconditionsisnotcorrect?本題答案：【Bothatractionandadisplacementcomponentsareprescribedineachdirection.】2、【單選題】For2Dcase,wewillhave()constitutiveequations.本題答案：【three】3、【多選題】Wewillhavetouse(),andtheboundaryconditionsEq.(5)fortypicalstressformulationmethod.本題答案：【Equilibrium#Constitutive#Compatibility】4、【多選題】Forthedisplacementformulationmethod,weneedtouse().本題答案：【Equationsofmotion#Geometrical#Hooke'slaw】5、【判斷題】Inthemechanicsofmaterials,wealwaysassumesomekinematicrelationsdealingwithsomeassumeddeformationmodes.本題答案：【正確】6、【判斷題】Forplanestressstate,alloutofplanestresscomponentsareidenticallyzero.本題答案：【正確】7、【填空題】Inplanestrainstate,alloutofplane()componentsareidenticallyzero.本題答案：【strain】8、【填空題】Thereareonlytwotypesofforces.Oneiscontactorsurfaceforces,anotheriscalledthe()force.本題答案：【body】QuizforChapter71、【單選題】HowmanytimesdidweapplyGreen'stheoryindevelopingAiry'sstressfunction?本題答案：【3】2、【多選題】WhichofthefollowingequationscanbetreatedasthedefiningequationsoftheAiry'sstressfunction?本題答案：【###】3、【判斷題】TheinversemeanswearegiventheAiry’sstressfunction.本題答案：【正確】4、【判斷題】Weareabletoobtainthreestresscomponentsbyusingonescalervaluedpotentialfunction.本題答案：【正確】5、【填空題】Inparticular,ifnobodyforcesandtemperaturechange,thedefiningequationforpotentialfunctionbecomesthe()potentialfunctionequalszero.本題答案：【biharmonic】6、【填空題】Thestresscomponentsinboththeplanestrainandplanestressdeformationswithout()andtemperaturesareindependentofthematerialconstants.本題答案：【bodyforces##%_YZPRLFH_%##bodyforce】QuizforChapter81、【單選題】Thestressconcentrationfactorisdefinedtobe本題答案：【maximumnormalstressoverthefarfiledstress】2、【多選題】Forsolvingaprobelmwithcirculardomain,whichofthefollowingthingswemightuse?本題答案：【Polarcoordinatesystem#Superpositionprinciple#Tractionstressrelations#Airy'sstressfunction】3、【判斷題】ThedefiningequationinAiry'sstressfunctionisaninvariantform.本題答案：【正確】4、【填空題】Thestressconcentrationisa()phenomenon.本題答案：【local】QuizforChapter91、【單選題】Whichofthefollowingdescriptionsisnotcorrect?本題答案：【Thefatiguelifeinthelowcyclefatigueislong.】2、【單選題】FormaterialswithoutthehorizontalportionintheS-Ncurve,weoftensetoneenoughlargenumbertobethelimit,asNequals本題答案：【】3、【多選題】Whichofthefollowingcriterioncanbeapplyforductilematerial?本題答案：【Trescacriterion#VonMisescriterion#Octahedralshearstresscriterion】4、【多選題】Fatiguehasthefollowingfeatures:本題答案：【Itnormallyoccursinrotatingmachineparts#Itoftenstartsfromsurfacedefects#Itisofteninfluencedbyfactorseludingrecognition#Itusuallyresultsinbrittlefracture】5、【判斷題】Ifthereisanobservablecrack,wecanstillusefailurecriteria.本題答案：【錯誤】6、【判斷題】Themaximumnormalstresscriterionisnotgoingtobeaccurateforhydrostaticcompression.本題答案：【正確】7、【填空題】Inthemostgeneralcase,wecandividethefailurecriteriaintotwobigparts.Onefor()criteria,andmostlyforductilematerials,likemetals.本題答案：【yielding】8、【填空題】Inthemostgeneralcase,wecandividethefailurecriteriaintotwobigparts.Onefor()criteria,whichforbrittlematerials,likeglass,ceramicandsomepolymer.本題答案：【fracture】QuizforChapter101、【單選題】Whichofthefollowingstatementsisnotcorrectforshearcenter?本題答案：【Thelocationoftheshearcenterisdependentofthedirectionandmagnitudeofthetransverseforces】2、【單選題】Whichofthefollowingstatementsisnotcorrectforcurvedbeams?本題答案：【Theinfluenceoftransverseshearonbeamdeformationmustbetakenintoaccount】3、【多選題】Whichofthefollowingstatementsarecorrectforsymmetricbending?本題答案：【Allthetransverseloadsactingonasymmetryplane#Theresultantmomentalwaysparalleltotheneutralaxis#Thelateraldeflectionisperpendiculartotheneutralaxis,andparalleltotheloadingplane#Stresscomponentsforsymmetricbendingcanbeobtainedfrommechanicsofmaterialsapproach】4、【多選題】Whichofthefollowingstatementsarecorrectforunsymmetricbending?本題答案：【Itdoesn’trequiresuchasymmetryplanefortheloads#Theresultantmomentisnolongerparalleltotheneutralaxis#Thelateraldeflectionisperpendiculartotheneutralaxis#Theresultantmomentisperpendiculartotheloadingplane】5、【判斷題】Wecanchooseanyplanecoordinatesintheunderunsymmetricbending,unlesstheyarerequiredtobecentroidalaxis.本題答案：【正確】6、【判斷題】Whentheforcedoesnotactthroughtheshearcenter,inadditiontobending,atwistingactionresults.本題答案：【正確】7、【填空題】Weassumethatthereisonly()inthecurrentunsymmetricbeam.本題答案：【bending】8、【填空題】Acurvedbarorbeamisastructuralelementforwhichthelocusofthecentroidsofthecrosssectionsisacurvedline()deformation.本題答案：【before】QuizforChapter111、【單選題】InPrandtlstressfunctionmethod,thestressinabarofarbitrarysectionmaythusbedeterminedbysolving()alongwiththegivenboundaryconditions.本題答案：【】2、【多選題】Intreatingnon-circularprismaticbars,whichofthefollowingstatementsarecorrect?本題答案：【Theshearstressesaretreatedtobezeroatcorners#Theshearstressesvariesalongthesamecontouronthesamecross-section#Weneedtodevelopnewtheoriesthatcanaccountforwarpingofthecrosssection.】3、【判斷題】Intreatingnon-circularprismaticbars,crosssectionsinitiallyplaneexperienceout-of-planedeformationorwarping,andthebasickinematicassumptionsoftheelementarytheoryareappropriate.本題答案：【錯誤】4、【判斷題】Inmechanicsofmaterials,theshearstrainvarieslinearlyfromzeroatthecentertoamaximumontheoutersurfaceforcircularcrosssections.本題答案：【正確】5、【填空題】InPrandtlstressfunctionmethod,thestressfunctionis()onthelateralsurface.本題答案：【constant##%_YZPRLFH_%##aconstant##%_YZPRLFH_%##zero##%_YZPRLFH_%##0】QuizforChapter121、【單選題】Theprincipleofminimumtotalpotentialenergyisdefinedby本題答案：【】2、【單選題】Whichofthefollowingrelationsisnotcorrectfromthestrainenergy?本題答案：【】3、【多選題】Thefeaturesofenergymethods:本題答案：【Theyinvolveonlyscalerquantities,su