Journal of Shanghai Jiaotong University ›› 2011, Vol. 45 ›› Issue (11): 1657-1660.

• Metallography and Metallurgical Technology • Previous Articles     Next Articles

Identification of Johnson-Cook Constitutive Model by Finite Element Analysis

  

  1. (1.School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240,China;2.Ecole Nationale Supérieure d’Arts et Métiers, Laboratory LAMPA, Angers 49035, France)
  • Received:2011-02-08 Online:2011-11-30 Published:2011-11-30

Abstract: An inverse approach was applied to identify the material parameters of Johnson-Cook constitutive equation which is largely used for describing materials’ behaviour in previous conditions. The shear experiments over a wide range of temperatures (20-1 000 °C) and strain rates (1-5 000 s-1) and the finite element method simulations were carried out for martensitic stainless steel 410. The goal of the inverse method is to find a parameter array which minimizes the difference between the experimental and numerical forcedisplacement data. The initial parameters are optimized by nonlinear leastsquare method. It is observed that the parameters optimized generally represent well the flow behaviours of material except the damage domain.

Key words: martensitic stainless steed, JohnsonCook model, inverse method, finite element analysis, parameter identification, optimization

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