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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 85
PROCEEDINGS OF THE FIFTEENTH UK CONFERENCE OF THE ASSOCIATION OF COMPUTATIONAL MECHANICS IN ENGINEERING Edited by: B.H.V. Topping
Paper 61
Large-Scale Fluid-Structure Interaction Simulation of Viscoplastic and Fracturing Thin-Shells Subjected to Shocks and Detonations F. Cirak1, R. Deiterding2 and S.P. Mauch3
1Department of Engineering, University of Cambridge, United Kingdom
Full Bibliographic Reference for this paper
F. Cirak, R. Deiterding, S.P. Mauch, "Large-Scale Fluid-Structure Interaction Simulation of Viscoplastic and Fracturing Thin-Shells Subjected to Shocks and Detonations", in B.H.V. Topping, (Editor), "Proceedings of the Fifteenth UK Conference of the Association of Computational Mechanics in Engineering", Civil-Comp Press, Stirlingshire, UK, Paper 61, 2007. doi:10.4203/ccp.85.61
Keywords: fluid-structure interaction, thin-shells, large deformations, fracture, detonations, parallelization.
Summary
A robust computational method for the loosely coupled simulation of
flexible thin-shells interacting with compressible high speed flows is
developed. The target applications of the present approach are highly
complex fluid-structure interaction problems, which, for example,
arise during fluid driven fracture and fragmentation of thin-shells.
The mechanical response of the fracturing thin-shell is modeled with a Kirhhoff-Love type shell theory in Lagrangian coordinates. The conforming finite element discretization of the underlying energy functional is accomplished with subdivision finite elements [1]. The compressible high-speed fluid flow is discretized with a Eulerian finite volume method on a block-structured Cartesian grid [2]. The coupling between the moving shell and fixed fluid discretization is facilitated by the use of level sets for representing the fluid-shell interface on the fluid mesh. The resulting implicit representation of the interface enables the efficient enforcement of the interface conditions [3]. All algorithmic components have been parallelized for distributed memory computing platforms. As verification and validation examples we consider, amongst others, the plastic deformation of a copper plate impacted by a strong pressure wave inside a water pipe and the rupture of thin aluminum tubes due to the passage of ethylene-oxygen detonations. References
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