外文翻譯--微波對核桃殼體材料拉伸力學(xué)性質(zhì)的影響研究.doc

本科畢業(yè)設(shè)計外文資料翻譯系別：工程技術(shù)系專業(yè)：機械設(shè)計制造及其自動化姓名：學(xué)號：2012年4月25日外文資料翻譯譯文MicrowaveinwalnutshellmaterialstensilemechanicalpropertiesofimpactstudyAbstractTakingthepickingfreshwalnutsastheresearchobject,themicrowavewalnutbreakhulltest,breakhullrateof87.65%；Andofmicrowaveeffectsonthewalnutshellmaterialstensilemechanicalpropertiesofinfluence,andtheresultsshowedthatthemicrowaveprocessing,walnutshellmaterialelasticmodulus,tensilestrengthandmechanicalindexesandprocessingtherewerenosignificantchangesbefore.Inaddition,alsoinwalnutshelltensilemechanicalpropertiesofthetestedandwonthewalnutthetensilestrengthoftheplacerelictlimitto1.47MPa,forsurewalnutemergedinflationarypressureinmicrowaveneededtoprovidethereference.Keywords:microwave；Breakhull；Thewholeshelltensile；Mechanicalproperties0PrefaceWalnutmachineryoftheexistenceofhighrateofbrokenemerged,thekernelrateislowhasbeenrestrictedwalnutrealizemechanizationproductionandprocessingoftheimportantreasonofourcountry,thedevelopmentofwalnutindustrialcausedcertaininfluence.Therefore,explorenewmethodsforrealizingmechanizationwalnutemergedindustrializationandexportincome,increasetheeconomicbenefithasurgentpracticalsignificance.Atpresent,thetechnologyforwalnutmechanizationemergedresearchfocusonthegapemerged,blowforextrusionemerged,methodsandtheapplicationoffiniteelementmethodforrelatedmechanicaldesignemerged,butstillhasbrokenrateishigh,thewholekernelratelow.Inaddition,theemergingtechnologyusedintheresearchisalsoemergednutsisintheascendant,suchasYangRuietcinwalnutlaserirradiationbehaviorbythenumericalanalysisandsimulation,exploresthelasertechnologyshellingmechanism；LiXiaoXiaexploresthebuckwheatshellmicrowavemethod；ZhangLi,YangfuEphraimwithmicrowavetechnology,realizetheboardofchestnutshell.Theauthoronthebasisofpreviousstudies,ofmicrowavetechnologyfunctionmechanismofwalnutemergedproposesthatemergedwalnutmicrowavemethodisfeasible.Thispaperistostudythispaperfurtherdiscussesthefront,tosearchformicrowaveprocessingtechnologyparameters(power,time,humidityandtemperature)inwalnutshellmaterialmechanicsandtheinfluencelawofnature,studiedthemicrowavetechnologyrolewalnutshellmaterialstretchingbeforeandafterthemechanicalpropertiesofdifferences,anddeterminetheseamwalnutthetensilestrengthofthelimitin,todeterminethewalnutmicrowaveemergedinflationarypressureandfurtherguidanceformicrowavetechnologyparametersareselectedtoprovidethereference.1WalnutmicrowavebreakhulltestWalnutisprimarilythroughmicrowavemicrowavebreakhullroleinwalnutmeat,itsinternalwatermoleculesinalternatingundertheinfluenceofelectromagneticfieldpolarizationorientationforhighfrequencyshift,theinternalwalnutinshorttimeproduceveryhighquantityofheatformhighpressurewatervapor,whenwatervaporpressureofthepressureofwalnutisinflationpressureisgreaterthantheultimatetensilestresswalnut,walnutburst.Therefore,thedensityofthenutshellisitsinternalstructureformedanimportantguaranteeofhighpressure；Thewalnutscontainmoistureisinternallygeneratedthematerialbasisofhighpressurewatervapor；Microwavetechnologyparameters(power,timeandtemperature,etc)isabletoruptureexternalpowerofwalnut.Therefore,itisnecessarytowalnutmicrowavetechnologyneededtobreakhullparametersweretested.1.1materialsandequipmentTestisjustpickedoffcorticalJinLong1cottonwalnutastheresearchobject,thewalnutsmoisturecontentof21%,topreventwaterloss,willtestsampleinaplasticbagsealedstoredintherefrigeratorforrefrigeration.WLD07S-08typeglanzemicrowaveovens,microwaverole,powerandtemperaturearetimeadjustable；Verniergauges.1.2testmethodThethreefactors3levelcompletelycombinationtest,eachportfolioselectionthreeshape,sizecloseofwalnutsimilarasrepeatedsamples.Beforethetesttestwalnuttrunnion,diameter,calipersize.Theend,observationandruptureofwalnutrecorded.1.3resultsandanalysisWalnutmicrowavebreakhullsituationasisshownintable1.Table1walnutmicrowavebreakhulltestresultsGroupnumberTemperaturePowerWTimeminBrokenshell/%1503002100250300366.7350300433.34505