FracturetestsofOFHCbarsunderimpacttensionandanalysis

basedonarepresentativevolumeelement

MA Dong-fang; HOU Yan-jun; CHEN Da-nian; WU Shan-xing; WANG Huan-ran; JIA Cun-wei

doi:10.11883/1001-1455(2011)04-0385-07

Volume 31 Issue 4

May 2014

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MA Dong-fang, HOU Yan-jun, CHEN Da-nian, WU Shan-xing, WANG Huan-ran, JIA Cun-wei. FracturetestsofOFHCbarsunderimpacttensionandanalysis basedonarepresentativevolumeelement[J]. Explosion And Shock Waves, 2011, 31(4): 385-391. doi: 10.11883/1001-1455(2011)04-0385-07

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FracturetestsofOFHCbarsunderimpacttensionandanalysis basedonarepresentativevolumeelement

doi: 10.11883/1001-1455(2011)04-0385-07

1.
Mechanicsand MaterialsScienceResearchCenter,NingboUniversity,

Funds:

NationalNaturalScienceFoundationofChina(10872100)

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Corresponding author: CHEN Da-nian
Publish Date: 2011-07-25

Abstract

Abstract

Unnotchedoxygen-freehighconductive(OFHC)barsweretestedatdifferenttensilevelocitiesonatensionHopkinsonbarandanovelfacilityforhigh- speedtensiletestsbasedonaone-stage gasgunsystem.AndtheimpactvelocitycorrespondingtothefractureattheimpactendwasdeterminedastheexperimentalcriticalimpactvelocityintensionofOFH .Arepresentativevolumeelement( RVE)wasmodeledbyacircularcylindercontaininganellipsoidvoidatitscenterandtheRVE wasdynamicallyloadedbyanaxialvelocityatitstop.Theentireprocesswasnumericallysimulated fromthevoidgrowthtovoidinstabilityintheRVEforOFHCwhichobeyedtheJ-CorZ-Aconstitutiverelation. Theconditionsofdynamicvoidinstabilitywerediscussedandacriterionbasedonvoid shapeevolutionwaspresented.TheaverageradialstrainsoftheRVEinvoidinstabilitywerecomparedwiththeexperimentallocalizedfracturestrainsoftheunnotchedOFHCbarsu deruniaxialimpacttension. TheexperimentalcriticalimpactvelocityintensionofOFHCwasalsoanalyzedbyusing theRVEmodel.
- solid mechanics,
- uniaxialimpacttension,
- representativevolumeelement,
- OFHCbar