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1.
IntroductionTheelastichalf_spacetheoryoffoundationvibrationandthestudyofsoil_structureinteractionproblemhavebeenthesubjectofintensiveresearchinthecivilengineering .SinceLucoetal.[1]summarizedthevibrationofacircularrigidfoundationrestingonanelastichalf_s…  相似文献   

2.
IntroductionWiththedevelopmentofnaturalscienceandtheincreasingrequirementintechnology,thelargedeflectionnonlinearproblemofbarsisalwaysanimportantresearchinengineeringapplicationfield.Inthe1960s,theresearchscopewasonlylimitedtoEuler’sElasticatheory,whichw…  相似文献   

3.
IntroductionTheoryofmicropoloarthermoelasticitypresentedbyW .Nowackiisrestudiedinourpaper[1].Thispaperisadirectcontinuationofreference [1 ] .Theproblemsoccurringinthetheoriesofthermopiezoelectricityandmagnetothermoelasticityformicropolarcontinuaaresimilart…  相似文献   

4.
IntroductionLiquid_solidtwo_phaseflowexistswidelyinnatureandmanyindustrialministries,forexample,sediment_ladenwaterflowisacharacteristicliquid_solidtwo_phaseflowinnatureandhydraulictransportofsolidmaterialisacharacteristicindustrialapplication.Thestud…  相似文献   

5.
ntroductionTheelasticorplasticdynamicbucklingofcolumnsundermanykindsofaxialimpactloadinghasbenstudiedforalongtime.Whenstudyin...  相似文献   

6.
IntroductionCrack_lineanalysismethodwasoriginallyproposedbyAchenbachandLi[1]andwasfurtherstudiedbyGUOandLI[2 ].However,theearliercracklinefieldanalysismethodsolvestheproblembymatchingaspecificsolutionofplasticfieldnearcracklinewithelasticsingularKfieldne…  相似文献   

7.
Afundamentalcharacteristicofplasmasistheir,abilitytosmearoutelectricfields.ThisisatypicalnonlinearproblemofsolvingthePoissonequation.Thepreviousstudyofthenonlinearproblemisusuallybasedonalinearizedmethodwhenthepotentialenergyoftheparticlesismuchsmalle…  相似文献   

8.
IntroductionAccordingtoLove[1],Saint_Venant’sPrinciplecanbeexpressedas:Theeffectofaself-equilibratedsystemofforcesactinginaspherewillrestrictinasmalldomainnearthesphere .Thisprincipleisthebridgebetweentheelasticitytheoryandapplication ,butithasnotbeenprov…  相似文献   

9.
IntroductionThecreepbehaviorofshortfiberreinforceMetalMatrixComposites (MMCs)dependsonthefollowingfactors,suchasthecreeppropertyofthematrix ,elasticandfracturespropertiesofthefiber,geometricparametersofthefibers,arrangementofthefibersandthepropertyofthef…  相似文献   

10.
DETERMINATION OF CREEP PARAMETERS FROM INDENTATION CREEP EXPERIMENTS   总被引:3,自引:0,他引:3  
IntroductionCreepisthetimedependentplasticdeformationofmaterialswhichischaracterizedbyastrongdependenceofthecreepratefromstressσonconstanttemperatureT .Thesecondarycreeprate εdependsonstressσas ε=Cc·σnC, ( 1 )whereCcisaconstant,nCisthecreepstressexponent.Th…  相似文献   

11.
IntroductionFromthebeginningof 1 990s,researchonsystemwithengineeringpracticalbackgroundbecomesmoreandmoreattractivebyusingthenonlineardynamicsystemtheory .Asamethodofsimplifyingdifferentialequations,thetheoryofNormalFormgivesthesimplestformsofdifferentia…  相似文献   

12.
IntroductionMuchfamiliarinengineeringareelasticfoundationplates,suchasfoundationbaseplatesincivilengineering,highwaysurface,r...  相似文献   

13.
ViscoelasticcharacteristicsofexpandedskinaftergraftingZengYanjun ,HuangKun ,XuChuanqing ,ZhangJing ,SunGuangci  (Ⅰ 1 )……………AgeneralrefinedshelltheoryfornonlinearanalysisoftiresZhangJianwu ,JiaLiping ,ShuYongping  (Ⅰ 8)…………………………………………Investigationofdynamicfra…  相似文献   

14.
IntroductionSomeauthorsstudiedthecoupledfieldproblemsformicropolarcontinua .Especially ,W .Nowackipublishedaseriesofabout 4 0scientificpapersdealingwiththemicropolarthermoelasticityaswellastheproblemsofdistortion ,thermodiffusion ,thermopiezoelectricityandm…  相似文献   

15.
IntroductionThetransientphenomenaofdynamicproblemsandthemannerstotreatthemaregenerallyrelatedtothespectralcharacteristicsofexcitation .Onemayomitpropagatingwavesifrelativelylowerfrequenciesgoverntheresponsesintheproblemssuchasseismicresponsesandrespon…  相似文献   

16.
MICROMECHANICS ANALYSIS ON EVOLUTION OF CRACK IN VISCOELASTIC MATERIALS   总被引:1,自引:0,他引:1  
IntroductionAsshownbyZHANGandXIONG ( 1 997) [1],underconstantloadingthecrackinviscoelasticmaterialshasanincubationtime ,withinitthecrackopeningdisplacement (COD)ischanginglargerwithtime,whilethecracklengthkeepsconstant.Investigationonthegradualopeningofthecrac…  相似文献   

17.
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   

18.
The effects of blood viscoelasticity on the pulse wave in arteries   总被引:1,自引:1,他引:0  
IntroductionThatthebloodhasviscoelasticpropertiesisawell_knownfact.TheresearchesforthebloodviscoelasticitybyG .B .Thurston[1~4]andS .Chien[5 ]showthatthebloodnotonlyappearstheviscoelasticityinvariousoscillatorybloodflows,butalsohasquitestrongelasticityinsome…  相似文献   

19.
IntroductionConsiderthesystemofpartialdifferentialalgebraicequations (PDAEs) :Σ : Pi(y1,y2 ,… ,yn) =0   (i =1,2 ,… ,r) ,wherethecoefficientsareinthedifferentialfieldKwithcharacteristiczero .TheimportantquestionishowtosolvethisPDAEsinthetheoryofpartialdifferentialequa…  相似文献   

20.
1 IntroductionandPreliminaryWhentheplasticconstitutiveequationatfinitestrainisdiscussed ,thefirstthingtodoistodefineareasonableplasticstrainratewhichisconnectedwiththeproblemofdecompositionofdeformationintoelasticandplasticparts .Inthelatestyearstherea…  相似文献   

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