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Speedup of Elastic–Plastic Analysis of Large-scale Model with Crack Using Partitioned Coupling Method with Subcycling Technique

Yasunori Yusa1, Shinobu Yoshimura1
1 The University of Tokyo, Tokyo, Japan.

Computer Modeling in Engineering & Sciences 2014, 99(1), 87-104. https://doi.org/10.3970/cmes.2014.099.087

Abstract

To speed up the elastic–plastic analysis of a large-scale model with a crack in which plasticity is observed near the crack, the partitioned coupling method is applied. In this method, the entire analysis model is decomposed into two non-overlapped domains (i.e., global and local domains), and the two domains are analyzed with an iterative method. The cracked local domain is modeled as an elastic–plastic body, whereas the large-scale global domain is modeled as an elastic body. A subcycling technique is utilized for incremental analysis to reduce the number of global elastic analyses. For a benchmark problem with 6 million degrees of freedom, the developed partitioned coupling solver with the subcycling technique was 3.34 times faster than the developed conventional FEM solver.

Keywords

Fracture mechanics, plasticity, nonlinear finite element method, coupled analysis, iterative methods

Cite This Article

Yusa, Y., Yoshimura, S. (2014). Speedup of Elastic–Plastic Analysis of Large-scale Model with Crack Using Partitioned Coupling Method with Subcycling Technique. CMES-Computer Modeling in Engineering & Sciences, 99(1), 87–104.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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