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| Reference : A scalable 3D fracture and fragmentation algorithm based on a hybrid, discontinuous Gale... |
| Scientific journals : Article | |||
| Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Materials science & engineering | |||
| http://hdl.handle.net/2268/69245 | |||
| A scalable 3D fracture and fragmentation algorithm based on a hybrid, discontinuous Galerkin, Cohesive Element Method | |
| English | |
| Radovitzky, Raúl [Massachusetts Institute of Technology - MIT > Department of Aeronautics and Astronautics > > >] | |
| Seagraves, Andrew [Massachusetts Institute of Technology - MIT > Department of Aeronautics and Astronautics > > >] | |
| Tupek, Mike [Massachusetts Institute of Technology - MIT > Department of Aeronautics and Astronautics > > >] | |
Noels, Ludovic  [Université de Liège - ULg > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >] | |
| 2011 | |
| Computer Methods in Applied Mechanics & Engineering | |
| Elsevier Science | |
| 200 | |
| 1-4 | |
| 326-344 | |
| International | |
| 0045-7825 | |
| Lausanne | |
| Switzerland | |
| [en] Dynamic brittle fracture ; Cohesive zone models ; Discontinuous Galerkin Methods ; Parallel Computing | |
| [en] A scalable algorithm for modeling dynamic fracture and fragmentation of solids in
three dimensions is presented. The method is based on a combination of a discon- tinuous Galerkin (DG) formulation of the continuum problem and Cohesive Zone Models (CZM) of fracture. Prior to fracture, the flux and stabilization terms aris- ing from the DG formulation at interelement boundaries are enforced via interface elements, much like in the conventional intrinsic cohesive element approach, albeit in a way that guarantees consistency and stability. Upon the onset of fracture, the traction-separation law (TSL) governing the fracture process becomes operative without the need to insert a new cohesive element. Upon crack closure, the rein- statement of the DG terms guarantee the proper description of compressive waves across closed crack surfaces. The main advantage of the method is that it avoids the need to propagate topo- logical changes in the mesh as cracks and fragments develop, which enables the indistinctive treatment of crack propagation across processor boundaries and, thus, the scalability in parallel computations. Another advantage of the method is that it preserves consistency and stability in the uncracked interfaces, thus avoiding issues with wave propagation typical of intrinsic cohesive element approaches. A simple problem of wave propagation in a bar leading to spall at its center is used to show that the method does not affect wave characteristics and as a consequence properly captures the spall process. We also demonstrate the ability of the method to capture intricate patterns of radial and conical cracks arising in the impact of ceramic plates which propagate in the mesh impassive to the presence of processor boundaries. | |
| Office of Naval Research under grant N00014-07-1-0764. Partial support from the U.S. Army through the Institute for Soldier Nanotechnologies, under Contract DAAD-19-02-D-0002 with the U.S. Army Research Office | |
| Researchers ; Professionals ; Students | |
| http://hdl.handle.net/2268/69245 | |
| 10.1016/j.cma.2010.08.014 | |
| http://dx.doi.org/10.1016/j.cma.2010.08.014 | |
| Copyright (c) Elsevier 2010 |
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