MSc. Thesis

Numerical modeling of electric hydro-impulsive stamping process

Summary

Electric hydro-impulsive stamping is a manufacturing process using blast wave in fluid, induced by electrical discharge, to produce a three-dimensional detail from a plane specimen. The experimental studies show that due to compressive stresses in the round specimen the formation of non-axisymmetric forms of deformation, or buckling, are possible under certain loads. The aim of the project was estimation of electrical charge to provide the final form of engineering product, avoiding buckling and satisfying durability condition.

To solve this problem, the finite element method with explicit integration scheme was employed. The finite element model was validated by theoretical and experimental results. The formation of non-axisymmetric forms was studied. The parameters of electrical charge, providing the required form of final product, were found.