第26卷阎石等：超弹性形状记忆合金丝力学性能试验463
.JournalofStructuralEngineering，andbars［J］
2004，130（l）：38－46.
［9］ThamburagiaP，AnandL.Superelasticbehaviorin
tensiontorsionofaninitiallytexturedNiTishapememoryalloy［J］.InternationalJournalofPlasticity，2002，18：1607－1617.
［10］HisakkiTobushi，YoshirouShimeno，TakashiHa-chisukaKikuakiTanaka.Influenceofstainrateon
superelasticofTiNishapememoryalloy［J］.Me-chanicsofMaterials，1998，30（2）：141－150.
［11］MauroDolce，DonatelloCardone.Mechanicalbehav-iorofshapememoryalloysforseismicapplications
［J］.InternationalJournalofMechanicalSciences，
2001，43（11）：2657－2677.
［12］WolonsD，GrandhiF，MalovrhB.Experimentalin-vestigationofthepseudoelastichysteresisdamping
characteristicsofshapememoryalloywires［J］.JournalofIntelligentMaterialSystemsandStruc-tures，1998，9（2）：116－126.
［13］GrasserEJ，CozzarelliFA.Shapememoryalloysas
newmaterialsforseismicisolation［J］.JournalofEngineeringMechanics，1991，117（11）：2590－2608.
ExperimentalResearchonMechanicalPerformancefor
Pseudo-ElasticityofShapeMemoryAlloy
YANShi，WANGQi，WANGWei
（SchoolofCivilEngineering，ShenyangJianzhuUniversity，ShenyangChina，110168）
Abstract：Inthispaper，thebasicmechanicalpropertiesofshapememoryalloys（SMAs）areresearchedbythemethodofcyclictension，whichcanbeusedforthedesignofdamperswiththeSMAs.Cyclenumber，loadingrateandpeakstrainareconsideredtoinvestigatetheireffectsonthemechanicalparametersofSMAs
dampingandresidualstressbythecyclictensiontest.Theexperimentalsuchasthestress-strainrelationship，
resultswerecomparedwiththemodelofGrasser′stheory.Themajorinfluencedparameters，lawsandresultsforthepseudo-elasticity（PE）performanceoftheSMAsareresearched.Theresultsshowedthat，atacertain
loadingrate，withthecyclenumberincreasing，thestress-straincurvesaregradualdownwardandthecurves
thephasestressanddampingoftheSMAwirestabilizeafter20cycles.Withthecyclenumberincreasing，
willbegettingdecreased，buttheresidualstresswillincreaseandtrendtostabilize.Theloadstrainisfaster，theenergydissipationcapacityislower.Withthestrainamplitudeincreasing，theenergydissipationcapacityandequivalentdampingoftheSMAsapproximatelylinearincrease，andthemodulusdecrease.Butthestrainamplitudehaslessimpactonthephasestress.SMAwires，whichareidealmaterialformakingdamper，canbehavestablestress-strainrelationshipandenergy-dissipationcapacityafteranumberofloadingcirculations.
Keywords：shapememoryalloy；pseudo-elasticity；circulationtensileexperiment；hystereticmodel；loading
rate