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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,BREAKHULLRATEOF8765;ANDOFMICROWAVEEFFECTSONTHEWALNUTSHELLMATERIALSTENSILEMECHANICALPROPERTIESOFINFLUENCE,ANDTHERESULTSSHOWEDTHATTHEMICROWAVEPROCESSING,WALNUTSHELLMATERIALELASTICMODULUS,TENSILESTRENGTHANDMECHANICALINDEXESANDPROCESSINGTHEREWERENOSIGNIFICANTCHANGESBEFOREINADDITION,ALSOINWALNUTSHELLTENSILEMECHANICALPROPERTIESOFTHETESTEDANDWONTHEWALNUTTHETENSILESTRENGTHOFTHEPLACERELICTLIMITTO147MPA,FORSUREWALNUTEMERGEDINFLATIONARYPRESSUREINMICROWAVENEEDEDTOPROVIDETHEREFERENCEKEYWORDSMICROWAVE;BREAKHULL;THEWHOLESHELLTENSILE;MECHANICALPROPERTIES0PREFACEWALNUTMACHINERYOFTHEEXISTENCEOFHIGHRATEOFBROKENEMERGED,THEKERNELRATEISLOWHASBEENRESTRICTEDWALNUTREALIZEMECHANIZATIONPRODUCTIONANDPROCESSINGOFTHEIMPORTANTREASONOFOURCOUNTRY,THEDEVELOPMENTOFWALNUTINDUSTRIALCAUSEDCERTAININFLUENCETHEREFORE,EXPLORENEWMETHODSFORREALIZINGMECHANIZATIONWALNUTEMERGEDINDUSTRIALIZATIONANDEXPORTINCOME,INCREASETHEECONOMICBENEFITHASURGENTPRACTICALSIGNIFICANCEATPRESENT,THETECHNOLOGYFORWALNUTMECHANIZATIONEMERGEDRESEARCHFOCUSONTHEGAPEMERGED,BLOWFOREXTRUSIONEMERGED,METHODSANDTHEAPPLICATIONOFFINITEELEMENTMETHODFORRELATEDMECHANICALDESIGNEMERGED,BUTSTILLHASBROKENRATEISHIGH,THEWHOLEKERNELRATELOWINADDITION,THEEMERGINGTECHNOLOGYUSEDINTHERESEARCHISALSOEMERGEDNUTSISINTHEASCENDANT,SUCHASYANGRUIETCINWALNUTLASERIRRADIATIONBEHAVIORBYTHENUMERICALANALYSISANDSIMULATION,EXPLORESTHELASERTECHNOLOGYSHELLINGMECHANISM;LIXIAOXIAEXPLORESTHEBUCKWHEATSHELLMICROWAVEMETHOD;ZHANGLI,YANGFUEPHRAIMWITHMICROWAVETECHNOLOGY,REALIZETHEBOARDOFCHESTNUTSHELLTHEAUTHORONTHEBASISOFPREVIOUSSTUDIES,OFMICROWAVETECHNOLOGYFUNCTIONMECHANISMOFWALNUTEMERGEDPROPOSESTHATEMERGEDWALNUTMICROWAVEMETHODISFEASIBLETHISPAPERISTOSTUDYTHISPAPERFURTHERDISCUSSESTHEFRONT,TOSEARCHFORMICROWAVEPROCESSINGTECHNOLOGYPARAMETERSPOWER,TIME,HUMIDITYANDTEMPERATUREINWALNUTSHELLMATERIALMECHANICSANDTHEINFLUENCELAWOFNATURE,STUDIEDTHEMICROWAVETECHNOLOGYROLEWALNUTSHELLMATERIALSTRETCHINGBEFOREANDAFTERTHEMECHANICALPROPERTIESOFDIFFERENCES,ANDDETERMINETHESEAMWALNUTTHETENSILESTRENGTHOFTHELIMITIN,TODETERMINETHEWALNUTMICROWAVEEMERGEDINFLATIONARYPRESSUREANDFURTHERGUIDANCEFORMICROWAVETECHNOLOGYPARAMETERSARESELECTEDTOPROVIDETHEREFERENCE1WALNUTMICROWAVEBREAKHULLTESTWALNUTISPRIMARILYTHROUGHMICROWAVEMICROWAVEBREAKHULLROLEINWALNUTMEAT,ITSINTERNALWATERMOLECULESINALTERNATINGUNDERTHEINFLUENCEOFELECTROMAGNETICFIELDPOLARIZATIONORIENTATIONFORHIGHFREQUENCYSHIFT,THEINTERNALWALNUTINSHORTTIMEPRODUCEVERYHIGHQUANTITYOFHEATFORMHIGHPRESSUREWATERVAPOR,WHENWATERVAPORPRESSUREOFTHEPRESSUREOFWALNUTISINFLATIONPRESSUREISGREATERTHANTHEULTIMATETENSILESTRESSWALNUT,WALNUTBURSTTHEREFORE,THEDENSITYOFTHENUTSHELLISITSINTERNALSTRUCTUREFORMEDANIMPORTANTGUARANTEEOFHIGHPRESSURE;THEWALNUTSCONTAINMOISTUREISINTERNALLYGENERATEDTHEMATERIALBASISOFHIGHPRESSUREWATERVAPOR;MICROWAVETECHNOLOGYPARAMETERSPOWER,TIMEANDTEMPERATURE,ETCISABLETORUPTUREEXTERNALPOWEROFWALNUTTHEREFORE,ITISNECESSARYTOWALNUTMICROWAVETECHNOLOGYNEEDEDTOBREAKHULLPARAMETERSWERETESTED11MATERIALSANDEQUIPMENTTESTISJUSTPICKEDOFFCORTICALJINLONG1COTTONWALNUTASTHERESEARCHOBJECT,THEWALNUTSMOISTURECONTENTOF21,TOPREVENTWATERLOSS,WILLTESTSAMPLEINAPLASTICBAGSEALEDSTOREDINTHEREFRIGERATORFORREFRIGERATIONWLD07S08TYPEGLANZEMICROWAVEOVENS,MICROWAVEROLE,POWERANDTEMPERATUREARETIMEADJUSTABLE;VERNIERGAUGES12TESTMETHODTHETHREEFACTORS3LEVELCOMPLETELYCOMBINATIONTEST,EACHPORTFOLIOSELECTIONTHREESHAPE,SIZECLOSEOFWALNUTSIMILARASREPEATEDSAMPLESBEFORETHETESTTESTWALNUTTRUNNION,DIAMETER,CALIPERSIZETHEEND,OBSERVATIONANDRUPTUREOFWALNUTRECORDED13RESULTSANDANALYSISWALNUTMICROWAVEBREAKHULLSITUATIONASISSHOWNINTABLE1TABLE1WALNUTMICROWAVEBREAKHULLTESTRESULTSGROUPNUMBERTEMPERATUREPOWER∕WTIME∕MINBROKENSHELL/15030021002503003667350300433345050021005505003100650500466775070021008507003667950700410010603002667116030036671260300410013605002100146050031001560500410016607002100176070031001860700466719703002667207030031002170300410022705002100

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