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外文翻译--微波对核桃壳体材料拉伸力学性质的影响研究.doc

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外文翻译--微波对核桃壳体材料拉伸力学性质的影响研究.doc

本科毕业设计外文资料翻译系别工程技术系专业机械设计制造及其自动化姓名学号2012年4月25日外文资料翻译译文MicrowaveinwalnutshellmaterialstensilemechanicalpropertiesofimpactstudyAbstractTakingthepickingfreshwalnutsastheresearchobject,themicrowavewalnutbreakhulltest,breakhullrateof87.65Andofmicrowaveeffectsonthewalnutshellmaterialstensilemechanicalpropertiesofinfluence,andtheresultsshowedthatthemicrowaveprocessing,walnutshellmaterialelasticmodulus,tensilestrengthandmechanicalindexesandprocessingtherewerenosignificantchangesbefore.Inaddition,alsoinwalnutshelltensilemechanicalpropertiesofthetestedandwonthewalnutthetensilestrengthoftheplacerelictlimitto1.47MPa,forsurewalnutemergedinflationarypressureinmicrowaveneededtoprovidethereference.KeywordsmicrowaveBreakhullThewholeshelltensileMechanicalproperties0PrefaceWalnutmachineryoftheexistenceofhighrateofbrokenemerged,thekernelrateislowhasbeenrestrictedwalnutrealizemechanizationproductionandprocessingoftheimportantreasonofourcountry,thedevelopmentofwalnutindustrialcausedcertaininfluence.Therefore,explorenewmethodsforrealizingmechanizationwalnutemergedindustrializationandexportincome,increasetheeconomicbenefithasurgentpracticalsignificance.Atpresent,thetechnologyforwalnutmechanizationemergedresearchfocusonthegapemerged,blowforextrusionemerged,methodsandtheapplicationoffiniteelementmethodforrelatedmechanicaldesignemerged,butstillhasbrokenrateishigh,thewholekernelratelow.Inaddition,theemergingtechnologyusedintheresearchisalsoemergednutsisintheascendant,suchasYangRuietcinwalnutlaserirradiationbehaviorbythenumericalanalysisandsimulation,exploresthelasertechnologyshellingmechanismLiXiaoXiaexploresthebuckwheatshellmicrowavemethodZhangLi,YangfuEphraimwithmicrowavetechnology,realizetheboardofchestnutshell.Theauthoronthebasisofpreviousstudies,ofmicrowavetechnologyfunctionmechanismofwalnutemergedproposesthatemergedwalnutmicrowavemethodisfeasible.Thispaperistostudythispaperfurtherdiscussesthefront,tosearchformicrowaveprocessingtechnologyparameterspower,time,humidityandtemperatureinwalnutshellmaterialmechanicsandtheinfluencelawofnature,studiedthemicrowavetechnologyrolewalnutshellmaterialstretchingbeforeandafterthemechanicalpropertiesofdifferences,anddeterminetheseamwalnutthetensilestrengthofthelimitin,todeterminethewalnutmicrowaveemergedinflationarypressureandfurtherguidanceformicrowavetechnologyparametersareselectedtoprovidethereference.1WalnutmicrowavebreakhulltestWalnutisprimarilythroughmicrowavemicrowavebreakhullroleinwalnutmeat,itsinternalwatermoleculesinalternatingundertheinfluenceofelectromagneticfieldpolarizationorientationforhighfrequencyshift,theinternalwalnutinshorttimeproduceveryhighquantityofheatformhighpressurewatervapor,whenwatervaporpressureofthepressureofwalnutisinflationpressureisgreaterthantheultimatetensilestresswalnut,walnutburst.Therefore,thedensityofthenutshellisitsinternalstructureformedanimportantguaranteeofhighpressureThewalnutscontainmoistureisinternallygeneratedthematerialbasisofhighpressurewatervaporMicrowavetechnologyparameterspower,timeandtemperature,etcisabletoruptureexternalpowerofwalnut.Therefore,itisnecessarytowalnutmicrowavetechnologyneededtobreakhullparametersweretested.1.1materialsandequipmentTestisjustpickedoffcorticalJinLong1cottonwalnutastheresearchobject,thewalnutsmoisturecontentof21,topreventwaterloss,willtestsampleinaplasticbagsealedstoredintherefrigeratorforrefrigeration.WLD07S08typeglanzemicrowaveovens,microwaverole,powerandtemperaturearetimeadjustableVerniergauges.1.2testmethodThethreefactors3levelcompletelycombinationtest,eachportfolioselectionthreeshape,sizecloseofwalnutsimilarasrepeatedsamples.Beforethetesttestwalnuttrunnion,diameter,calipersize.Theend,observationandruptureofwalnutrecorded.1.3resultsandanalysisWalnutmicrowavebreakhullsituationasisshownintable1.Table1walnutmicrowavebreakhulltestresultsGroupnumberTemperaturePower∕WTime∕minBrokenshell/1503002100250300366.7350300433.345050021005505003100650500466.77507002100850700366.795070041001060300266.71160300366.71260300410013605002100146050031001560500410016607002100176070031001860700466.71970300266.7207030031002170300410022705002100

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