Large-scale fluid-structure interaction simulation of viscoplastic and fracturing thin-shells subjected to shocks and detonations

Authors:
Fehmi Cirak;Ralf Deiterding;Sean P. Mauch
Affiliations:
University of Cambridge, Department of Engineering, Cambridge CB2 1PZ, UK;Oak Ridge National Laboratory, P.O. Box 2008 MS 6367, Oak Ridge, TN 37831, USA;California Institute of Technology, Mail Code 158-79, Pasadena, CA 91125, USA
Venue:
Computers and Structures
Year:
2007

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Abstract

The fluid-structure interaction simulation of shock- and detonation-loaded thin-walled structures requires numerical methods that can cope with large deformations as well as local topology changes. We present a robust level-set-based approach that integrates a Lagrangian thin-shell finite element solver with fracture and fragmentation capabilities and an Eulerian Cartesian fluid solver with optional dynamic mesh adaptation. As computational applications, we consider the plastic deformation of a copper plate impacted by a strong piston-induced pressure wave inside a water pipe; and the induction of large plastic deformations and rupture of thin aluminum tubes due to the passage of ethylene-oxygen detonations.