saturn00000 / UMAT_optimization_public

UMAT_OPTIMIZATION

The optimization code for

1. Anisotropic Yield function
   • Hill 1948
   • Yld2000-2d
   • Yld2004-18p
   • Any other anisotropic yield function
2. Anisotropic Hardening models
   • Chaboche-type
   • Yoshida-Uemori
   • HAH11 / HAH14 / HAH20 / HEXAH (HAH22)
   • Any other anisotropic hardening models
3. Dislocation hardening model
   • RGBV (K. Kitayama et al.)

Available deformation mode

1. Uniaxial tension
2. Forward-reverse loading
3. Cross-loading

Optimization algorithm

1. Nelder-Mead
2. Genetic algorithm (Multi processor)
3. Pattern search (Multi processor)
4. Global search

Prerequisites

1. MATLAB
2. Optimization toolbox
3. Global optimization toolbox
4. MATLAB-Mex

Note

1. The optimized model coefficients will be written in the form of material property file with the name of 'PROPS_FINAL.CSV'
2. Step1: Experiment data pre-processing: This must be done before starting the optimization code
3. Step2: Optimization code: you can select proper reference deformation modes.

Screeshots

1. Anisotropic yield function

2. Anisotropic hardening model: Cyclic loading

3. Anisotropic hardening model: Cross loading