Application of SPH method for modeling of metal extrusion process

Numerical models are widely used for the prediction of stress and strains that the materials undergo in extrusion processes. These factors affect the quality of the extruded product as well as the speed of production process. Due to its meshless nature, the smooth particle hydrodynamics (SPH) method is capable of simulating processes where severe deformations occur. Therefore, it is highly suitable for modeling of extrusion processes. In this study, the SPH method is used for the simulation of extrusion processes for two different geometries of the die cross section. For all cases, a parametric analysis on friction was conducted and the influence on the strain fields as well as the extrusion forces was investigated. Also, in order to calibrate the models to predict the experimental forces, it was necessary to use different friction coefficients for the die and the container section. The SPH method modeled accurately the influence of each section's frictional forces on the strain field and extrusion forces. Furthermore, the calibrated models were able to capture the experimental data with a 10% accuracy for a range of different values for the initial billet temperature and ram speed.

Automated summary

The study utilized the Smooth Particle Hydrodynamics (SPH) method to simulate extrusion processes with two different die cross section geometries and conducted a friction parameter analysis. The calibrated models accurately captured experimental data, effectively showcasing the influence of frictional forces on strain fields and extrusion forces.