A New Optimization Method of Constitutive Equation for Hot Working Based on Physical Simulation and Numerical Simulation
This paper advances a new optimization method about material constitutive equation on the basis of physical simulation and numerical simulation results which basic thinking can be described as the following: through comparing the results of the material deformation process under actual experimental conditions and virtually simulated by the finite element numerical simulation method with the constitutive equation established on the basis of the physical simulation, the constitutive equation established by the experimental data is optimized in turn. Based on it, this paper advances a visco/plastic constitutive equation to depict the semi-solid thixo-forming and the constitutive equation is analyzed and optimized through coupling of the physical simulation and numerical simulation. It is observed that this method can effectively eliminate the influence of the factor outside material itself on the constitutive equation. So, it can exactly depict the deformation behavior of the materials and improve the accuracy and reliability of the numerical simulation.
Jitai NIU, Zuyan LIU, Cheng JIN and Guangtao Zhou
F. G. Li et al., "A New Optimization Method of Constitutive Equation for Hot Working Based on Physical Simulation and Numerical Simulation", Materials Science Forum, Vols. 575-578, pp. 402-407, 2008