雙基推進(jìn)劑高應(yīng)變率力學(xué)模型及應(yīng)用研究.pdf

1、聲明尸明本學(xué)位論文是我在導(dǎo)師的指導(dǎo)下取得的研究成果，盡我所知，在本學(xué)位論文中，除了加以標(biāo)注和致謝的部分外，不包含其他人已經(jīng)發(fā)表或公布過的研究成果，也不包含我為獲得任何教育機(jī)構(gòu)的學(xué)位或?qū)W歷而使用過的材料。與我一同工作的同事對(duì)本學(xué)位論文做出的貢獻(xiàn)均已在論文中作了明確的說明。研究生簽名：≥DB年7月芍日學(xué)位論文使用授權(quán)聲明南京理工大學(xué)有權(quán)保存本學(xué)位論文的電子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以向有關(guān)部門或機(jī)構(gòu)送交并授

2、權(quán)其保存、借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容。對(duì)于保密論文，按保密的有關(guān)規(guī)定和程序處理。研究生簽名：洳J3年3月才日碩士論文AbstractWiththedevelopmentoftechnologyintherocketmissile，thesafetyissueofthesolidrocketmotorhasbecomeincreasinglyprominentSomeshockoverloadsuchashighemissi

3、vityoverloadanddropimpactmaycausethegrainstructuretodeformandcrack，whichmayleadtocatastrophicfailureTherefore，thehighspeedimpacthasrecentlybeentheresearchfocusofthesolidrocketmotorintegritywhichrequiredtoanalyzethemechan

4、icalresponseofrocketmotorgrainunderimpactloading，andtoestablishaconstitutivemodelwhichcoulddescribethosemechanicalresponses111euniaxialcompressiveexperimentofdoublebasepropellant(DB)wasperformedontheuniversalmaterialtest

5、machineandSplitHopkinsonPressureBar(SHPB)underdifferenttemperatures，respectivelyTheresultingstressstraincurveswereobtainedatstrainratesbetween10。4s。1and103S～I(xiàn)tindicatedthatthedynamicfailurestrengthofDBisdependentonthestr

6、ainrateYieldstressandyieldstrainincreasewi吐lincreasingstrainratesinthequasistatictestsanddynamictests，andbothofthemhaveanapproximatelylinearrelationship、^，imthelogarithmofstrainInordertofullydescribetherelationshipatawid

7、erangeofstrainrates，apowerlawconstitutiveequationWasadoptedBesides，themechanicalpropertiesaredependentontemperatureAsthetemperatureincrease，thematerialbecomessoftanditsmechanicalpropertiesdegenerateTheDBwasfoundtotransmi

8、tintotheglassystateat一400Candbehaveasabrittlematerial，aductiletobrittletransformationphenomenonWasobservedaswellnecoefficientsofZhuWangTang(ZWT)constitutiveequationwereobtainedbyfittingtheexperimentaldatausingtheleastsqu

9、aremethodResultsshowthatZWTconstitutiveequationissufficienttocharacterizethemechanicalpropertiesofdoublebasepropellantundervaryingstrainrateTheSHPBsimulationWasalsoperformedtovalidatetheZWrTmodelsuppliedbyausersubroutine

10、GoodagreementbetweenthenumericalresultsandtheexperimentaldataWasobservedThisdemonstratesthatthemodelcouldcharacterizethepreyieldingbehaviorofDBMoreoveranumericalanalysisofstressdistributioninthepropellantgrainof122mmrock

11、etsextended—rangemissileunderemittingWascarriedoutThisworkmayfacilitatethetheoreticalandnumericalanalysisofstructuralintegrityanalysisofpropellantgrainandrocketenginedesignKeyword：Doublebasepropellant；Highstrainrate；SHPB