Effectsofperiodically-distributeddefectsonductilefragmentationprocess

ofmaterialsunderhighstrain-ratetension

ZhengYu-xuan; ZhouFeng-hua; HuShi-sheng

doi:10.11883/1001-1455(2013)02-0113-07

Volume 33 Issue 2

Apr. 2014

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ZhengYu-xuan, ZhouFeng-hua, HuShi-sheng. Effectsofperiodically-distributeddefectsonductilefragmentationprocessofmaterialsunderhighstrain-ratetension[J]. Explosion And Shock Waves, 2013, 33(2): 113-119. doi: 10.11883/1001-1455(2013)02-0113-07

Citation:

ZhengYu-xuan, ZhouFeng-hua, HuShi-sheng. Effectsofperiodically-distributeddefectsonductilefragmentationprocess ofmaterialsunderhighstrain-ratetension[J]. Explosion And Shock Waves, 2013, 33(2): 113-119. doi: 10.11883/1001-1455(2013)02-0113-07

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Effectsofperiodically-distributeddefectsonductilefragmentationprocess ofmaterialsunderhighstrain-ratetension

doi: 10.11883/1001-1455(2013)02-0113-07

1.
CASKeyLaboratoryforMechanicalBehaviorandDesignof Materials,
2.
UniversityofScienceandTechnologyofChina,

Funds:

NationalNaturalScienceFoundationofChina(10972108)

More Information

Corresponding author: ZhouFeng-hua
Publish Date: 2013-03-25

Abstract

Abstract

Toexploretheeffectsoftheinitialdefectsonthefragmentationprocessesofmaterialsat highstrainrates,anexplicitFEMcodewasusedtosimulatethedynamicfragmentationprocessesof thinelastic-plasticbarsundergoinguniformhighstrain-ratetensiledeformations.Thethinbarwas prescribedwithperiodically-distributedgeometricaldefects.Numericalsimulationsdisplaythatthe barswiththeinitialdefectsusuallybreakintopiecesearlierthanthosewithoutdefects.Forthethin barswiththeperiodically-distributeddefects,thereexistsastrain-rateregioninwhichthefragmentationprocessiscompletelycontrolledbythedefects. Thisfragmentationprocessiscalledthedefectcontrolledfragmentationprocess. Thespacingandthesizeofthedefectsalsoaffectthefragmentation processbymovingthestrain-rateregionofthedefect-controlledfragmentation.Theeffectsofthe combineddefectdistributionontheductilefragmentationprocesswerealsodiscussed.
- solidmechanics,
- initialdefects,
- FEM,
- ductilematerial,
- defectcontrolledfragmentation,
- fragmentnumber