A Meshless Method for Fluid-Structure Interactions: Application to the Failure Prediction of a Tank Under Impact

Abstract eng:
The development of numerical methods for the simulation of thin structures in interaction with a fluid is an industrial issue. In particular, such simulations should be able to predict a possible failure of the shell and the resulting leakage rate in situations involving impacts. This kind of simulations involves three key components: a thin structural model that includes highly nonlinear behaviors leading to failure, a fluid model able to handle sloshing and spatters phenomena, and finally, fluid-structure interactions whose topology can change drastically during calculations. This paper presents a solution based on a meshless method called Smoothed Particles Hydrodynamics (SPH) which is used to model both the fluid and the shell. The fluid-structure interaction is handled via a unilateral contact algorithm adapted to the SPH context. The capabilities of the method are illustrated on several problems involving fracturing shells and by simulating an experiment involving fluid leakage of a tank impacted by a bullet.

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