SCALABLE AND LOCALISED MODEL ORDER REDUCTION APPLIED TO COMPOSITE AERO-STRUCTURES

Due to the interaction of structural meso-scale and geometric macro-scale features, composite aero-structures are inherently multi-scale in nature. In addition, complex manufacturing processes lead to the appearance of defects at multiple scales. These defects bring extra dimensions to the multi-scale problem which discourage the use of a scale separation hypothesis. Despite the growing knowledge of the types of composite characteristic defects, for large scale aerostructures, their location and exact geometry remain unknown or are only observable with difficulty. Hence, a large-scale uncertainty quantification (UQ) problem must be solved. The primary challenge is the cost of the associated numerical simulation. Therefore, to tackle this problem, an efficient multiscale generalized finite element (FE) method has been developed within the open-source software package DUNE (https://www.dune-project.org/). Thanks to its modularity, our method has been integrated into an Offline/Online framework allowing a very efficient exploration of defects in of the material parameters.