A strongly coupled partitioned approach for fluid‐structure‐fracture interaction |
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| Authors: | Y Sudhakar Wolfgang A Wall |
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| Affiliation: | Institute for Computational Mechanics, Technical University of Munich, Garching, Germany |
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| Abstract: | We present a novel method to model large deformation fluid‐structure‐fracture interaction, which is characterized by the fact that the fluid‐induced loads lead to fracture of the structure and the fluid medium fills the resulting crack opening; the mutual interaction between the crack faces and the surrounding fluid contributes substantially to the overall dynamics. A mesh refitting approach is used to model the quasi‐static fracture of the structure, and a robust embedded interface formulation is used to solve the fluid flow equations. The proposed method uses a strongly coupled partitioned scheme with Aitken's Δ2 method as convergence accelerator. Selected numerical examples of increasing complexity are presented to evaluate the performance of the proposed fluid‐structure‐fracture coupling algorithm. The most difficult simulation of the reported examples involves a number of complex phenomena: mixed‐mode crack propagation through the structure, fluid starts to fill the crack opening, complete fracture of the structure into two pieces of which one is carried away by the flow. |
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| Keywords: | fluid‐structure‐fracture interaction fluid‐structure interaction with crack propagation strongly coupled partitioned scheme mesh refitting approach |
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