共查询到20条相似文献,搜索用时 15 毫秒
1.
张双寅 《应用数学和力学(英文版)》2002,23(3):271-275
IntroductionAsshownbyZHANGandXIONG ( 1 997) [1],underconstantloadingthecrackinviscoelasticmaterialshasanincubationtime ,withinitthecrackopeningdisplacement (COD)ischanginglargerwithtime,whilethecracklengthkeepsconstant.Investigationonthegradualopeningofthecrac… 相似文献
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IntroductionItisshownbyavailabletheoriesandexperiments[1]thaticosahedralsymmetryquasicrystalexistinginA1_Mnalloyis 3Dquasicrystal,ithasnotsymmetryinanydimensionsin 3Dspace ;Thesocalled 2Dquasicrystalsarethattheyhavetranslationalperiodicityinonespacedirecti… 相似文献
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IntroductionForgeomaterialssuchasrockandconcrete,thefrictionalslidingalongmicrocracksurfacesisassociatedwiththeplasticitymodeldescribedbytheMohr_Coulombtheory ;moreovercrackpropagationcorrespondstodamagegrowth .Thecouplingofdamageandplasticityofaphenom… 相似文献
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IntroductionDuetotheintrinsiccouplingcharacteristicsbetweenelectricandelasticbehaviors,thatis,appliedmechanicalloadingproduceselasticdeformation ,aswellaselectricfield ,andconverselyelectricfieldcangiverisetoelasticdeformation ,piezoelectricmaterialshave… 相似文献
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A FORM INVARIANCE OF CONSTRAINED BIRKHOFFIAN SYSTEM 总被引:2,自引:0,他引:2
IntroductionThestudyofthedynamicsofBirkhoffiansystemisanactivebranchinthemodernclassicalmathematicsandamoderndevelopingdirectioninmathematicphysics ,andcanbeappliedtoquantummechanics,statisticalmechanics ,biologicphysics,mechanicsofspaceflightandsomefie… 相似文献
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IntroductionDynamicsanalysisofcrackedrotorwhenignoringnonlinearwhirlingcouldbefoundinmanyReferences [1 -3 ] .Nonlineardynamicsofcrackedrotorwithwhirlinghavebeenstudiedbasedonformerscholar’swork[4 ]andthewhirlingequationsofacrackedshafthavebeenestablished .Th… 相似文献
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Afundamentalcharacteristicofplasmasistheir,abilitytosmearoutelectricfields.ThisisatypicalnonlinearproblemofsolvingthePoissonequation.Thepreviousstudyofthenonlinearproblemisusuallybasedonalinearizedmethodwhenthepotentialenergyoftheparticlesismuchsmalle… 相似文献
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On the isometric isomorphism of probabilistic metric spaces 总被引:1,自引:0,他引:1
刘明学 《应用数学和力学(英文版)》2002,23(5):614-617
IntroductionTherearetwokindsofisometricisomorphisminprobabilisticmetricspacetheory (see[1 -9] ) .ThefirstisthataPMspace (E ,F)isisometricallyisomorphictoanotherPMspace(E′,F′) ,andthesecondisthataPMspaces(E ,F)isisometricallyisomorphictoageneratingspaceofquasi_met… 相似文献
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IntroductionThatthebloodhasviscoelasticpropertiesisawell_knownfact.TheresearchesforthebloodviscoelasticitybyG .B .Thurston[1~4]andS .Chien[5 ]showthatthebloodnotonlyappearstheviscoelasticityinvariousoscillatorybloodflows,butalsohasquitestrongelasticityinsome… 相似文献
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A THEORETICAL SOLUTION OF CYLINDRICAL SHELLS FOR AXISYMMETRIC PLAIN STRAIN ELASTODYNAMIC PROBLEMS 总被引:1,自引:0,他引:1
IntroductionTheanalysisfordynamicproblemofelasticbodieshasbeenstudiedformanyyears.Basedonthemomentlessthinshelltheory ,HuthandCole[1]studiedthestresswaveinasphericalshellproducedbypressureloadsin 1 955.Mcivor[2 ]discussedtheflexuralstressandmembranestressina… 相似文献
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IntroductionThediscoveryofquasicrystalaround 1 984 [1,2 ,3]issignificantbreakthroughforcondensedmatterphysicsinrecentyears.Thequasiperiodicsymmetryofsolidpresentsgreattheoreticalsignificance .Numerousquasicrystallinematerialswithstablepropertywereproduced ,thi… 相似文献
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干洪 《应用数学和力学(英文版)》2000,21(6):699-706
IntroductionWiththedevelopmentofnaturalscienceandtheincreasingrequirementintechnology,thelargedeflectionnonlinearproblemofbarsisalwaysanimportantresearchinengineeringapplicationfield.Inthe1960s,theresearchscopewasonlylimitedtoEuler’sElasticatheory,whichw… 相似文献
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IntroductionBellows[1,2 ]isashellofrevolutionwithwrinkledmeridian ,usuallynamedafteritsmeridionalshapeinaperiodoritsprofileofaconvolution ,suchasΩ_shapedbellows,C_shapedbellows,U_shapedbellowsandsoon .Theyarewidelyusedinmanyfields,forexample ,theelasticsense… 相似文献
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IntroductionAnumberofmaterialsinengineeringcanbeclassifiedinthecatalogofviscoelasticity ,includingrock ,soil,polymer,andER MRmaterialsetc .[Christensen 1 982 [1],TAO 1 999[2 ]] .Thedynamicanalysisofviscoelasticproblemsisrelatedtothetimedependentsolutions.Eventhoughdi… 相似文献
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IntroductionDynamicstabilityanalysisofviscoelasticstructuresismuchmorecomplicatedsincethemathematicalmodelturnsouttobeasystemofintegro_partial_differentialequations,ratherthanasystemofpartialdifferentialonesasintheelasticstructure[1].Manyworkshavebeenp… 相似文献
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IntroductionThetransientanalysisfor 3_Delastodynamiccrackproblemsisanimportantcontentinfracturemechanics.Becauseofthedifficultiesoftheproblems,thecalculationofDSIFfor 3_Dcrackisaproblemunsolvedcompletelyuptothepresent.Chen[1]firstlyusedthefinitedifference… 相似文献
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范家参 《应用数学和力学(英文版)》2000,(4)
Nomenclature x , y dimensionalabscissaandordinaterespec tively (m)l halflengthofthecrack (m)δ halfwidthofthecrack (m) t dimensionaltimevariable (s) w dimensionalverticaldisplacement (m) A/ ρ oneofthedimensionalparameterinRayleighdampingformula (s- 1 ) B/ ρ theotherdi… 相似文献
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IntroductionCreepisthetimedependentplasticdeformationofmaterialswhichischaracterizedbyastrongdependenceofthecreepratefromstressσonconstanttemperatureT .Thesecondarycreeprate εdependsonstressσas ε=Cc·σnC, ( 1 )whereCcisaconstant,nCisthecreepstressexponent.Th… 相似文献
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Dynamical Stability of Viscoelastic Column with Fractional Derivative Constitutive Relation 总被引:1,自引:0,他引:1
IntroductionMoreandmoreproblemsinscienceandengineeringhaveconcernedthestabilityanalysisoftheviscoelasticstructuresduetotheirbroadapplications .In [1]CederbaumandMondappliedthemultiple_scalesmethodtotreatstabilityofaviscoelasticcolumnunderaperiodicaxiall… 相似文献