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Chinese Journal of High Pressure Physics  > 2009  >  23(1): 46-50 .
XIAO Da-Wu, LI Ying-Lei, HU Shi-Sheng. Constitutive Model of Pure Zirconium under High Temperature and High Strain Rate[J]. Chinese Journal of High Pressure Physics, 2009, 23(1): 46-50 . doi: 10.11858/gywlxb.2009.01.008
Citation: XIAO Da-Wu, LI Ying-Lei, HU Shi-Sheng. Constitutive Model of Pure Zirconium under High Temperature and High Strain Rate[J]. Chinese Journal of High Pressure Physics, 2009, 23(1): 46-50 . doi: 10.11858/gywlxb.2009.01.008
shu

Constitutive Model of Pure Zirconium under High Temperature and High Strain Rate

doi: 10.11858/gywlxb.2009.01.008
  • 1.

    National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China;

  • 2.

    Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China

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  • Corresponding author: HU Shi-Sheng
  • Received Date: 24 Mar 2008
  • Rev Recd Date: 18 Jul 2008
  • Issue Publish Date: 15 Feb 2009
    Abstract
  • The thermo-mechanical response of zirconium has been investigated under temperature ranging from normal temperature to 1 073 K and strain rate from 4.110－4 s－1 to 2.8103 s－1. Results show that the flow stress and strain hardening rate of zirconium are very sensitive to the changes of temperature and strain rate. The flow stress and strain hardening rate increase with the increase of strain rate, and decrease with the increase of temperature. Based on the concept of dislocation kinematics, a physically based constitutive model is developed, and the model is modified by taking into account of the effect of developing twins during deformation. The modified model could be used to predict the flow stress of zirconium over a wide range of temperature and strain rates. The experimental results are in good agreement with the predictions.

     

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