畢業(yè)論文外文翻譯-偏心控制的多軸疲勞試驗機研究

1、畢業(yè)設(shè)計（外文翻譯）英文題目DevelopmentofaDeflectionControlledMultlaxlalFatigueTestingMaching中文題目偏心控制的多軸疲勞試驗機設(shè)計系（院）機電工程系專業(yè)機械設(shè)計制造及其自動化學(xué)生姓名學(xué)號指導(dǎo)教師職稱二〇一六年三月濱州學(xué)院本科畢業(yè)設(shè)計(外文翻譯)1DevelopmentofaDeflectionControlledMultlaxlalFatigueTestingMaching

2、Thispaperdiscussesthedevelopmentofamultiaxialfatiguetestigmachine.ThedeflectioncontrolledeccentricdisktypetestingmachineproducesmodeImodeIIcombinationofbothofcracksurfacedisplacementsonroundflatspecimens.Theseloadingsare

3、necessaryfresearchoncomplexmultiaxialstresseswhicharecommoninengineeringpracticesuchascrankshafts.Thismachineachievedtheobjectivewithverysimplemechanisms(vectsumoftwocrankthrowsofeccentricdisksyieldbendingmomentsvectdiff

4、erencestwistingmoments)butwithmecomputationinsettingthedesiredparameters.Bendingdatatsiondataproducedbythemachinewereingoodagreementwiththedatabyaconventionalfatiguetestingmachine.Multiaxialdataproducedbythemachinewereal

5、soingoodagreementwiththepredictionbyawellprovedmultiaxialfatiguethey.Applicationsofthemultiaxialfatiguetestingmachinearedescribed.KeyWds：MultiaxialFatigueBendingTsionOutofPhaseDeflectionControlledTestingMachineDiscrimina

6、tingSpecimen1.INTRODUCTIONMostengineeringcomponentssuffermultiaxialcyclicloadings.Fatiguecrackinitiationpropagationundermultiaxialloadingsshowdifferentbehavifromthoseofuniaxialloading.Fatiguelifepredictionofstructuresmac

7、hinepartsundermultiaxialloadingsisessentialtotheirreliabledesignfailureprevention.Suchpredictionwasoftenbasedonsimplelabatydatageneratedundercyclicuniaxialloading.ResearchbyBrownMiller(l973)Krempl(1974)Lee(1980)Garud(198

8、1)indicatedthatuniaxialdataalonecannotbeapplieddirectlytothepracticalsituationsofcomplexmultiaxialfatiguei.e.movingprincipalaxesnonproptionalloading.Manyfatiguetheiescriteriahavebeenproposedbutnonewasgenerallyaccepted(Ga

9、rud1981Lee1985).Verylittleexperimentalwkhasbeendoneinthisfieldowingtothelackofpropermultiaxialfatiguetestingmachines.Therefereliablefatiguetestingfacilitiesarerequiredfmultiaxialfatigueresearch.Varioustypesofmultiaxialfa