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 forcedisplacement data. The initial parameters are optimized by nonlinear leastsquare method. It is observed that the parameters optimized generally represent well the flow behaviours of material except the damage domain.
Received: 08 February 2011
Published: 30 November 2011
