简介：了解Groove2007如何帮助你在公司内部和公司之间轻松地建立和维护有效的工作组环境。

简介：AccordingtotherequirementsofdesigningV-groovepulleytransmission,anapplicationdevelopmentbasedonAutoCADenvironmentandusingAutoLISPlanguageispresented.AsanexampleofeffectivesolutionforCADapplication,theCADsystemforV-groovepulleytransmissionisestablished.

简介：Rollingbearingiswidelyusedinmechanicalsupport,itsgeneralcomponentsaretheinnerring,outerring,theball,retaineretc..Nowmanycompaniesindevelopedcountriesanduniversityintherollingbearingastheresearchobject,andhasmadegreatprogressindesigntheory,theexperimentmethodandproductiontechnologyetc.WewillusethefiniteelementANSYStoestablishthemodelofdeepgrooveballbearing.Throughthecontactanalysis,wecangetthecontactstressbetweentheringsandballs,strain,contactstate,penetration,slidingdistanceandthefrictionstressdistribution.ThesevaluesarecomparedtothetheoreticalvalueswithHertztheory,andtheyhavebetterconsistency,providethegoodtheoreticalbasisfortheoptimizationdesignofrollingbearings.

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简介：Thesubbandstructures,distributionsofelectronandholewavefunctions,statedensity,opticalgainspectra,andtransparencycarrierdensityoftheV-grooveZn1-xCdxSe/ZnSequantumwiresareinvestigatedtheoreticallyusingfourbandeffective-massHamiltonian,whichtakesintoaccounttheeffectsofthevalencebandanisotropyandthebandmixing.Thebiaxialstraineffectforquantumwiresisincludedinthecalculation.ThecompressivestrainintheZn1-xCdxSewireregionincreasestheenergyseparationbetweentheuppermostsubbands.Theopticalgainwithxy-polarizedlightisenhanced,whileopticalgainwithz-polarizedlightisstronglydecreased.Thexy-polarizedopticalgainspectrumhasapeakataround2.541Ev,withthetransparencycarrierdensityof0.75×1018　cm-3.Thecalculatedresultsalsoshowthatthestraintendstoincreasethequantumconfinementandenhancetheanisotropyoftheopticaltransitions.

简介：The30mmthickASTM4130steelpipewasfabricatedbygastungstenarcweldingandshieldedmetalarcweldingunderquenchedandtemperedconditions.Whereafter,themechanicalpropertiesofweldedjointsofbothVgrooveandcombinationdouble.Vgrooveweremeasured,whilethemicrostructurefeatureandfracturemorphologyofbothweldedjointswereinvestigated.Moreover,theeffectofgrooveshapesonthepropertiesofweldedjointswasexplored.TheresultsshowthattheweldingefficiencyofthecombinationdoubleVgroovejointisastwotimesasthatoftheVgroovejoint.Butthehardnessandtoughnessoftheheat-affectedzone(HAZ)withcombinationdoubleVgroovecannotsatisfytherequirements.Also,thecoarsegrainheat-affectedzone(CGHAZ)ofthecaplayerismainlycomposedofgranularbainite,temperedmartensiteandasmallamountofcarbon-freebainite,andthefracturedsurfaceofthefusionlineisentirelydominatedbythequasi-cleavagemode.ThatthemechanicalpropertiesofthecombinationdoubleVgroovearelowerthanthatoftheVgroovelieinthepenetrationratio,weldingheatinput,andtheareasanddistributionfeatureofbrittlezones.ThecombinationdoubleVgrooveisnotsuitableforthefabricatingofASTM4130steel.

简介：Constrainedgroovepressing(CGP)isanewsevereplasticdeformationmethodsuitableforproducingultra-finegrainedsheetmetals.Inthiswork,theprocessingefficiencyforamuti-passCGPofpurecopperwasinvestigated.Witharelativelysmallgroovewidthof2mmandtightconstraint,asharpvariationofmechanicalpropertieswithpassnumberisobserved.Subgrainswiththesizeof*0.5lmhavedistinctboundaries,whichisthepredominantfeatureinthemicrostructureafterthreepasses.Theevolutionofdeformationhomogeneitycharacterizedbymicro-hardnessdistributionwasexaminedindetail.Observationsofopticalmicrographsandfracturesurfacemorphologyconfirmtheevolutionrule.Therelationbetweenelectricalresistivityandaccumulativeplasticstrainwasdiscussed.Crystallinedefects,micro-cracks,andmicrostructureuniformitytogetherdeterminethechangeofelectricalresistivityofCGPcopper.

简介：Theinfluenceofgalvannealingonthetransformationofthesink-rollgroove-markdefectwasstudiedbycomparingthedefectsongalvannealed(GA)coatingwiththoseongalvanized(GI)coating,ItwasfoundthatdefectsonGIcoatingcontainedhighamountsofaluminum,zincdross,andazinc-ironintermetallicoutburststructure,aswellasslightscratchesonthesubstrate.Afterbeinggalvannealed,thealuminumcontentwashigherandtherewasamuchgreateroutburststructure,whichmadethecoatingofthedefectthickerthanthenormalcoating,whilethezincdrossandscratchesonthesubstratehaddisappearedduetozincandirondiffusionduringthegalvannealingprocess.

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简介：InthisstudyweconductedsingleV-groovebuttwelding(GTAW)onthreetypesofheattreatablealuminumalloys2024-T351,6061-T6and7075-T6andcomparedtheangulardistortionlevelsofthethreealuminumalloysatdifferentVeepreparationangleswithorwithoutrestraint.ExperimentalresultsdemonstratedthatwhentheVeepreparationanglewas0°(I-shapedgroove),theangulardistortionleveloftherestrainedweldmentcanexceedthatoftheunrestrainedweldments.Moreover,whentheVeepreparationanglewas45°,60°or90°,therestrainedweldmenthadlowerangulardistortionthantheunrestrainedweldments.ThesingleVeepreparationangle(amountoffillermetal)inbuttweldingaffectedtheangulardistortionoftheweldment.Withoutrestraint,theangulardistortiontendedtoincreasewiththesingleVeepreparationangle.Meanwhile,theangulardistortiontendedtodecreasewhenthesingleVeepreparationanglewas60°.Additionally,arestrainedweldmenthadhighangulardistortionwhenthesingleVeepreparationanglewas0°.Notably,theangulardistortiontendedtoreducewithincreasingsingleVeepreparationangle.Theangulardistortionoftheweldmentwasminimizedatanangleof60°.However,theangulardistortionincreasedwhentheVeepreparationangleexceeded60°.Thehigh-temperatureyieldstrengthofamaterialalsoaffecteditsangulardistortion.Angulardistortionincreasedwithhigh-temperatureyieldstrength.Experimentalresultsalsoshowedthat,fromthestrongesttotheweakest,thehigh-temperatureyieldstrengthofthethreetypesofaluminumalloysfollowedtheorder6061-T6and2024-T351>7075-T6.

简介：AnovelopticalfibersensorwithaU-shapedmicro-groovestructureablatedbyfemtosecondlaseronsingle-modefi-berformeasuringairrelativehumidity（RH）isreportedinthispaper.Inordertoimprovetheaccuracyofsensor,agrapheneoxide（GO）/polyvinylalcohol（PVA）compositefilmiscoatedonthesurfaceofmicro-groovestructure.IntheU-shapedmicro-groovestructure,theremainingcoreandmicro-cavityinthemicro-groovemakeuptwomajorop-ticalpropagationpaths,formingaMach-Zehnderinterferometer（MZI）.ThesensorhasagoodlinearresponsewithintheRHrangeof30%--85%,andthemaximumsensitivitycanreach0.6381mrd%RH.Theeffectoftemperatureontheoverallperformanceofthehumiditysensorisalsoinvestigated.Asanewtypeofall-fiberdevice,thesensorshowsexcellentsensitivityandstability.

简介：Pipesarewidelyusedtotransportgas,oilandwaterinindustries.Dragreductioninpipesisanincreasinglyconcernedproblemtosaveenergy.Someresearcheshaveindicatedthatthenon-smoothsurfacewithspecialstructurescanreduceflowloss.Inthispaper,anexperimentalinvestigationhasbeenperformedontheeffectsofakindofsurfacegrooveonthedraginbothrectangularandcircularductatdifferentReynoldsnumbers.Intheexperimentoftherectangularduct,totalpressureatbothinletandoutletweremeasured.Staticpressureonthewallwasmeasuredonthesurfacewithsmoothandgroovedfilmrespectively.Inthecircularduct,aboundarylayerpressureprobewasusedtomeasurethetotalpressuredistributionatbothinletandoutlet.Fourtapsatinletandoutletwereusedtomeasurestaticpressure.Thelosscoefficientisusedtoevaluatetheeffectsofthesurfacegrooveondragreduction.TheexperimentwasconductedwiththeReynoldsnumberrangefrom1.28×10~4to2.57×10~4.Theresultshowsamaximumdraglossreductionofapproximately2.4%inrectangularductatReynoldsnumberof2.4×10~4.A10%reductionofpipepressurelossbygroovedsurfaceismeasuredincircularductataReynoldsnumberof3.0×10~5.

简介：数字模拟与沟在一个维的Ag电影单身者裂缝结构的光传播改进性质上被执行了。结果证明沟的位置，深度和数字在光传播上有大影响，并且出现电浆子电磁声子和回声模式是主要因素。35.8dB的最大的扑灭比率被调整沟深度在单个裂缝结构完成。

简介："GasTransmittingFromWesttoEastProject"issignificant.Itshouldensuretheweldingqualityandsafetyofpipeline.Thetaskisveryarduoustoguaranteethequalityoftheprojectintheconditionoflongline,complexweatherandgeologyfeatures.Inthispaper,theweldingcoldcrackingsusceptibilityofdomesticX-70pipelinesteeladoptedbytheproject,whichisoneofthemostinterestingquestionsofweldingqualityaboutpetrolpipeline,wasstudiedbymeansofobliqueY-groovecrackingtest.Thecrackratioofsurfaceandsectionwastestedundertheconditionsofdifferentweldingmaterialsandpreheattemperature.TheX-70pipelinesteelhasgoodcrackresistance.Theresearchhasimportantvaluefortheconstructionoflarge-scalepipelineengineeringandtheapplicationofdomesticX-70pipelinesteel.