Upload
lelien
View
213
Download
0
Embed Size (px)
Citation preview
The Third International Conference on Computational Modeling of Fracture and Failure of Materials and Structures
CFRAC 2013 Prague, Czech Republic, 5–7 June 2013
Modelling Dynamic Fracture of Shells Filled with Fluid
A. Combescure1*
, V. Faucher2, F. Caleyron
1,2, S. Potapov
3
1 LaMCoS, Universite de Lyon, INSA Lyon, UMR CNRS 5259, 18-20 Allée des sciences 69621
Villeurbanne cedex (France), [email protected] 2
CEA DEN, DM2S, Laboratoire d'Etude de Dynamique, F-91191 Gif-sur-Yvette, France 3
LaMSID UMR EDF-CNRS-CEA 2832 EDF DER Clamart 92440 France
The paper is devoted to the presentation of
simulation of dynamic fracture of shells filled with
fluid. The proposed simulations are also carefully
compared with experimental results.
The first part of the presentation shall be devoted to
the presentation of the damage fracture transition in
case of transient loadings. The implementation of
these concepts in an SPH context shall then be
introduced. The definition of a crack in an SPH
structural modeling shall be presented. The
extension of SPH method to shell formulation shall
then be presented as well as the fracturing SPH
shell strategy.
The finite element SPH coupled model for fluid
structure interaction shall then be presented and
explained. For instance one shall explain how the
unilateral contacts are treated.
The method shall then be compared to a series of
experiments. These comparison shall show the
interest the potentials and the limits of such an
approach. For instance one will show that the
method is able to explain why the flow shows
regularly spaced knots. The method also predicts
the case of failure of the shell as well as the
directions and length of cracks propagated by the
fluid flow. The flow through the cracks is also
predicted. On the other hand the long, rm pressure
field in the fluid does not compare well with the
experiments. This is due to the poor representation
of the pressure field in the fluid model chosen into
these simulations in case of low speed flows
References
[1] F. Caleyron, A. Combescure, V Faucher,
S. Potapov, SPH modeling of fluid–solid
interaction for dynamic failure analysis of fluid-
filled thin shells, J Fluid Struct 39 (2013) 126–
153.
[2] F. Caleyron, A. Combescure, V Faucher,
S. Potapov, Dynamic simulation of damage
fracture transition in smoothed particles
hydrodynamics shells, Int J Numer Meth Eng
90 (2012) 707–738.
[3] O. Allix, J. F. Deu, Delayed-damage modelling
for fracture prediction of laminated composites
under dynamic loading, Engineering Transac-
tions / Rozprawy Inzynierskie 45 (1997) 29–46.
[4] T. Rabczuk, T. Belytschko, A three-dimen-
sional large deformation meshfree method for
arbitrary evolving cracks, Comput Method
Appl M 196 (2007) 2777–2799.