內(nèi)爆加載下鋼圓管的變形、損傷及層裂研究.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文內(nèi)爆加載下鋼圓管的變形、損傷及層裂研究姓名：李雪梅申請學(xué)位級別：碩士專業(yè)：工程力學(xué)指導(dǎo)教師：胡時(shí)勝金孝剛2003.6.1Abstracttnthispaperconvergingdeformationandspallinginimplodedcylindricalsteel28tubewereresearched，mainlybythemethodsofsliding—detonation，softrecov

2、erymacro—analysisandmicro—observationsTheresultscanprovidereferenceddataandintuitionisticspaltimagesforsomekindsofspecialmilitaryapplications；moreovel；CanbeaverifyingforadvancedsimulationsdealingwithspallinsuchdomainsBes

3、ides，Someotherphenomenasuchasadiabaticshearcracksinoutsidesurfaceofsteeltube，melting，andphasechangeswereanalyzedinthispaperFinalIynumericalsimulationwaspreliminarilydonebyonedimensionalhydrodynamicprogramExperimentswered

4、onewiththreekindsofhi盛explosive，whichwereliquidCH3N02withCJpressureof14IGPasolidGI920witllC—Jpressureof210GPaandsolidGH一925withCJpressureof261GPaMoreoverthreeoutershellconditionsincludingnooutershell，wititsteelshelloflmm

5、thicknessandwithsteelshellof2mmthicknesswereadapted，andseveralkindsofexplosivethicknesswereintroducedtoanalyzetheinfluenceofloadingstrength，outershellandexplosivethicknessonthedeformationandspoilingofcylindricalsteeltube

6、Resultsindicatethatspallationmaditsmorphologyofcylindricalsteeltubedepend012loadingconditions。WhenliquidCH3N02wasusedforloading，riospallwasobservedevenexplosivethicknesshadbeenjustifiedfromavalueequaltosteeltubethickness

7、toavaluefarbelowthisOntheotherhand，whenGI920orGH一925wasusedforloading，thereexistedacriticalexplosivethicknessrelatedtOloadingcondition：nospoilwouldoccurwhenexplosivethicknesswasbeyondthiscriticalvalue，andspalloccurredife

8、xplosivethicknessWaSbelowit；moreoverincreasedloadingstrengthorincreasedoutershellthicknesscouldbothmakecriticalexplosivethicknessforspallingdecreaseInthispapertheratioofthiscriticalexplosivethicknesstocylindricalsteeltub

9、ethicknesswasabout10whenexposedGt920Wasused，anditfallto09whenfiercerexplosiveGH一925酒mlmmoutershellWasused；fimherthiscriticalvaluewoulddecreasemorebyincreasingthicknessofoutershellAtthesametimespoilingscabwouldgetthinnera