A model reduction approach for real-time part deformation with nonlinear mechanical behavior

Interaction, in real time, between a designer and a virtual prototype is a promising way to optimize the parts design in mechanical industries. These interactions can induce deformation of some flexible parts of the prototype. The analysis in real time of nonlinear mechanical model by finite element method (FEM) is impossible. Our approach is based on two phases: 1-some load cases, characteristic of possible handlings, are precalculated; 2-results of this campaign are interpolated during the real-time immersion. This paper compares 4 approaches to calculate a reduced result of the campaign as fast as possible: an a posteriori reduction, an a priori enrichment method, an a priori enrichment-reduction and the hyperreduction.