Tangent space Data Driven framework for elasto-plastic material behaviors
Résumé
This paper describes the use of the new paradigm Model-Free Data Driven Computational Mechanics for solving elasto-plastic evolutionary problem. A data driven, variational formulation dedicated to elasto-plastic, quasi static boundary problems, using tangent operator and transition rules based on threshold laws, ready to be implemented into existing finite element software packages, is presented. In order to enhance precision, a sampling technique based on Gaussian distribution is presented. Several representative test cases for elastoplastic materials will also be presented, followed up by a discussion about accuracy, convergence properties and some practices adopted to enhance the performance of this new kind of solver.