Efficient Implementation of Global-Local Iterative Coupling and Acceleration Techniques in Abaqus for Nonlinear Structural Analysis

This paper presents the implementation and convergence study of the Global-Local Iterative Coupling (GLIC) technique in the commercial software Abaqus, using its co-simulation engine. The GLIC approach allows for a non-intrusive multi-scale modeling of complex structures by coupling a global coarse model with local refined models, while maintaining the global model unchanged. The authors explore the use of three different convergence acceleration techniques (Aitken's relaxation, Anderson acceleration, and Broyden's quasi-Newton method) to improve the computational efficiency of the GLIC approach.