On the implementation in Abaqus of the global--local iterative coupling and acceleration techniques

TL;DR

This paper investigates the implementation and acceleration of global-local iterative coupling in Abaqus, demonstrating improved convergence and performance for complex nonlinear structural problems.

Contribution

It introduces convergence acceleration techniques and an inexact solver strategy for global-local coupling in Abaqus, enhancing multi-scale modeling efficiency.

Findings

Convergence acceleration techniques improve performance.

Inexact solver strategy reduces computation time.

Promising results for complex nonlinear structural applications.

Abstract

This paper presents results and convergence study of the Global--Local Iterative Coupling through the implementation in the commercial software Abaqus making use of the co-simulation engine. A hierarchical modeling and simulation approach is often required to alleviate modeling burdens. Particular focus has been devoted here on convergence acceleration and performance optimization. Two applications in statics with nonlinear material behavior and geometrically nonlinear formulation are considered here: first a holed curved plate under traction with elastic--plastic material, then a pre-stressed bolted joint connecting two plates between each other and subjected to traction load. Three different convergence acceleration techniques are compared in terms of convergence performance and accuracy. An inexact solver strategy is proposed to improve computing time performance. The results show promising results for the coupling technology and constitute a step forward in the availability of non-intrusive multi-scale modeling capabilities for complex structures and assemblies.