Space/time global/local noninvasive coupling strategy: Application to viscoplastic structures

Maxime Blanchard (1) , Olivier Allix (1) , Pierre Gosselet (1) , Geoffrey Desmeure (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 Safran Aircraft Engines

The purpose of this paper is to extend the non-invasive global/local iterative coupling technique [15] to the case of large structures undergoing nonlinear time-dependent evolutions at all scales. It appears that, due to the use of legacy codes, the use of different time grids at the global and local levels is mandatory in order to reach a satisfying level of precision. In this paper two strategies are proposed and compared for elastoviscoplastic models. The questions of the precision and performance of those schemes with respect to a monolithic approach is addressed. The methods are first exposed on a 2D example and then applied on a 3D part of industrial complexity.

Mots clés: Noninvasive coupling strategies; viscoplasticity; multiple time stepping

Domaines: Mécanique des structures [physics.class-ph]

Maxime Blanchard, Olivier Allix, Pierre Gosselet, Geoffrey Desmeure. Space/time global/local noninvasive coupling strategy: Application to viscoplastic structures. Finite Elements in Analysis and Design, 2019, 156, pp.1-12. ⟨10.1016/j.finel.2019.01.003⟩. ⟨hal-01986932⟩