Simulations of slug impact with smoothed particle hydrodynamics: Some remarks on frequently asked questions

The Finite Element method is a well suited tool to take into account the co mplexity of the geometries, the non linear behavior laws and the contact mo deling. The Lagrangian algorithm is in its essence relatively simple and we ll adapted for impact problems between solids. It have drawbacks when the m esh is subjected to large deformation. The Euler-Lagrange formulation helps avoid large distortions but is more difficult to set up and presents diffi culties when the boundary conditions are of Lagrangian kind. To solve these problems frequently encountered during fluid-structure impac t, we use in EUROPLEXUS code the SPH formulation (for the slug) coupled wit h classical finite element. In this paper we present some results of a numerical investigation about th e influence of different parameters used in SPH such as the artificial visc osity, the smoothing length... These results are then applied to slug impac t loading of a vessel head.