Identificationofdynamicconstitutiveparametersofahigh-strengthsteel

andnumericalsimulation

XIE Heng; Lü Zhen-hua

doi:10.11883/1001-1455(2011)03-0279-06

Volume 31 Issue 3

May 2014

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XIE Heng, Lü Zhen-hua. Identificationofdynamicconstitutiveparametersofahigh-strengthsteelandnumericalsimulation[J]. Explosion And Shock Waves, 2011, 31(3): 279-284. doi: 10.11883/1001-1455(2011)03-0279-06

Citation:

XIE Heng, Lü Zhen-hua. Identificationofdynamicconstitutiveparametersofahigh-strengthsteel andnumericalsimulation[J]. Explosion And Shock Waves, 2011, 31(3): 279-284. doi: 10.11883/1001-1455(2011)03-0279-06

Citation:

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Identificationofdynamicconstitutiveparametersofahigh-strengthsteel andnumericalsimulation

doi: 10.11883/1001-1455(2011)03-0279-06

1.
DepartmentofAutomotiveEngineering,TsinghuaUniversity,Beijing 100084,China

Publish Date: 2011-05-25

Abstract

Abstract

Theengineeringstress-engineeringstrainrelationsofN-1steelweremeasuredusingSHTB atdifferentstrainratesfrom10-3to103s-1.Theresultswereanalyzed,andtherate-hardeninglawof N-1steelwasdetermined.Thetruestressatthecenterofthefracturedcross-sectionwascalculated. Therelationbetweentruestrainandspecimensvaryingthicknesswithinthesmallestcross-section wasexplored,andthetruestrainatthecenterofthefracturedcross-sectionwasidentifiedwitha modifiedapproach.ThusthemodifiedJohnson-Cook (MJC)constitutivemodelparametersofN-1 steelwereidentified.Thebar-barimpacttensileexperimentswithrectangularcross-sectionspecimens werenumericallysimulatedtoverifytheproposedconstitutivemodelparameteridentificationmethod andsimulationmethod.Thesimulatedresultsaresatisfying.
- solidmechanics,
- constitutivemodelparameters,
- modifiedJohnson-Cookconstitutivemodel,
- high-strengthsteel,
- dynamicmechanicalproperty