固體推進劑準靜態(tài)力學(xué)性能預(yù)測方法研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文固體推進劑準靜態(tài)力學(xué)性能預(yù)測方法研究姓名：趙娜申請學(xué)位級別：碩士專業(yè)：固體力學(xué)指導(dǎo)教師：翟鵬程20081201武漢理廠人學(xué)碩十學(xué)位論文AbstractThemaintaskofthispaperwastostudythepredictionmethodofthequasi—staticmechanicalpropertiesofthesolidpropellant，totallyusingthreemethods

2、tocarryoutthenumericalcalculationofthesamplesprovidedbycooperationunitThefirstmethodwasacomputationalmicro—mechanicsmethodbasedOilthedescriptionofLagrange，inthispartitestablishedatwodimensional，multi—component，multi—scal

3、e，highfillingrateparticlerandomdistributionmodeltakingeffectofthevolumecontentofparticlesandtheparticlescalewhichhastothequasistatictensilemechanicalpropertiesofthesolidpropellantItsmainstepsare：firstlygenerateageometric

4、modelofparticlesrandomdistribution，cutthe鰣d，andbuildanumericalmodelofthesamples，Thenseparatelygivepropermaterialmodelstothematrixandfillingparticle，usingbilinearplasticconstitutivemodelforthematrixandelasticityconstituti

5、vemodelforfillingparticlesFinallycalculatewithLS—DYNAThesecondmethodconsideredtheeffectwhichtheweakinterfacehastothetensilemechanicalpropertiesofthesolidpropellantBasedonthemodelofthefirstmethod，itsnumericalmodelseparate

6、thenodeswithintheinterfacebetweenmatrixandparticleThen，thesenodesintheinterfaceoverlapeachotherbuttheyhaveindependentnumbersThethirdmethodisacomputationalmicro—mechanicsmethodbasedonthecouplingofEulerandLagrangeInthismet

7、hod，thematrixusedEulergrid，theparticlesusedLagrangegrid，thencouplingthegn‘dsthoughkeywords木CONSTRAINED～LAGRANGE—IN_SOLIDThroughcomparingtheexperimentsandnumericalsimulationsresultsofthethreemethods，theconclusioncanbedraw

8、n：Inthefirstmethod，besidesconsideringtheimpactofparticlevolumecontent，thevolumecontentofHMXalsohasasignificantimpactonthelimitstrainofsolidpropellant，thehigherthecontentofHMXparticle，thegreaterthelimitstrainofthematerial

9、ThereisnotanyclearruleintheimpactonlimitstressConsideringtheimpactofparticlesize，thesizeofAlandHMXparticlehavesignificantimpactonthelimitstressandstrainThesmallertheparticlessizeofAIandHMX，thegreaterthelimitstressandstra