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| An inverse method for material parameters in metal forming |
| Revised:July 08, 2002 |
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| DOI：10.7511/jslx20043053 |
| KeyWord:metal forming,material parameters,inverse method,simulating priori informating,activity rule,anisotropy |
| Cao Yinfeng* Li Guangyao Zhong Zhihua |
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| Abstract: |
| The method for identification of parameters in anisotropic elasto-plastic constitutive models was presented in this paper. The method combined the experimental measurement, finite element simulation and optimization techniques. An activity rule was proposed for selecting measurement locations and the new concept of simulating priori information is first brought forward to give the feasible interval of initial values of identified parameters. Using the modified Levenberg-Marguardt method mixed with the optimal strategy of Gauss-Newton method the detail formulations and procedure were drawn and some key problems which influence the identification process seriously were discussed. Numerical examples show that the proper initial guessed parameters and the determination of feasible interval play an important rule in identified process. The simulating priori information and the activity rule for selecting measurement locations are essential for parameter identification. Numerical results indicate that the method possesses pretty good accuracy and high convergence rate. |
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