Non-intrusive coupled global/local analysis of localized plasticity problems
Résumé
This paper presents a computational strategy to solve structural problems featuring nonlinear phenomena that occur within a small area of interest, while the rest of the structure retains a linear elastic behavior. Two finite element models are involved: a global linear model of the whole structure, and a local nonlinear submodel” meant to replace the global model in the area of interest. An iterative exchange technique is then used to perform this replacement in an exact but non-intrusive way, which means the model data sets are never modified and the computations can be carried out with standard finite element software. Several ways of exchanging data between the models are investigated and convergence rates are presented on simple academic cases.