Simulationofhypervelocity-impactdebrisclouds

usingaLagrangeFEM withnodeseparation

ZHANG Xiao-tian; JIA Guang-hui; HUANG Hai

doi:10.11883/1001-1455(2010)05-0499-06

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ZHANG Xiao-tian, JIA Guang-hui, HUANG Hai. Simulationofhypervelocity-impactdebriscloudsusingaLagrangeFEM withnodeseparation[J]. Explosion And Shock Waves, 2010, 30(5): 499-504. doi: 10.11883/1001-1455(2010)05-0499-06

Citation:

ZHANG Xiao-tian, JIA Guang-hui, HUANG Hai. Simulationofhypervelocity-impactdebrisclouds usingaLagrangeFEM withnodeseparation[J]. Explosion And Shock Waves, 2010, 30(5): 499-504. doi: 10.11883/1001-1455(2010)05-0499-06

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Simulationofhypervelocity-impactdebrisclouds usingaLagrangeFEM withnodeseparation

doi: 10.11883/1001-1455(2010)05-0499-06

1.
SchoolofAstronautics,BeijingUniversityofAeronauticsandAstronautics,

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Corresponding author: JIA Guang-hui
Publish Date: 2010-09-25

Abstract

Abstract

AnimprovedLagrangefiniteelementmethodwasproposedforimpactfractureanaylysis,in whichthenodeseparationtechniquewasusedtoachievemeshseparationandthedistortionerosion methodwasappliedtodealwithseriouslydistortedelements.ByapplyingtheLS-dynasolver,a C++programwasdevelopedtoestablishthecomputationalmodelforthenodeseparationandimplementthedistortionerosion. TheC+ + program wascombinedwiththeLS-dynarestartanalysis functiontoachievefractureanalysis.Ahypervelocityimpactproblemwassimulatedbythenode-separationLagrangeFEMandSPH meshfreemethod,respectively.AndthesimulatedresultswerecomparedwiththeexistingexperimentalresultsandtheEulerEFMresults. Comparisonshowsthatthe node-separationLagrangeFEM takestheadvantagesoffastcalculation,goodstability,andclear boundary,anditcanbeusedtoaccuratelyandeffectivelysimulatehypervelocityimpactproblems.
- mechanicsofexplosion,
- debriscloud,
- FEM,
- hypervelocityimpact