A Weakly Coupled Fluid Solid Interaction Approach for Hydrostatic Pressure Build-Up in Metal Processing

This paper presents a new modelling approach for liquid lubricant behavior in metal forming operations by focusing on the hydrodynamic pressure build-up micro pockets. Theoretical and numerical fundamentals of proposed are introduced, upsetting an aluminum cylinder with artificial pocket is presented as validation case. The framework splits fluid-solid interaction model into computational fluid dynamics solid mechanics part. While part employs Lagrangian finite element flow formulation plastic deformation, built upon set Navier-Stokes equations applying Eulerian method combination Arbitrary Langagian formalism. latter enables displacement based coupling from to fluid. fluid-to-solid enabled formulation’s inherent velocity-pressure characteristics. weak avoids ill-conditioning system matrix makes it possible benefit both meshes.