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An enhanced nonlinear multi-scale strategy for the simulation of buckling and delamination on 3D composite plates

2017; Elsevier BV; Volume: 317; Linguagem: Inglês

10.1016/j.cma.2017.01.015

1879-2138

Karin Saavedra, O. Allix, Pierre Gosselet, Jorge Hinojosa, Antoine Viard,

Composite Material Mechanics

This paper is devoted to the study of a micro–macro LaTIn-based Domain Decomposition Method for which the partitioning, the geometry and the boundary conditions play a major role in the number of iterations to convergence and in the scalability. To confront these obstacles, an analysis of the macroscopic space and of the search direction–two parameters of the strategy–is proposed for traction, bending and buckling examples. Then, we propose a new search direction which takes into account the global stiffness of the structure and that limits the need to enrich the macroscopic space. This choice leads to a minimal number of iterations, a reduced computation time and the scalability of the strategy. The enhanced parameter is then applied to the simulation of combined buckling and delamination of a composite 3D plate.