Asymptotic analysis of extrusion of porous metals
Plane strain extrusion of fully dense and porous metals is analysed using asymptotic techniques. The extrusion die is assumed to taper gradually down the extrusion axis. The asymptotic expansions are based on a small parameter \(\varepsilon\) which is defined as the ratio of the total reduction of the original cross-section to the length of the reduction region. Coulomb's law is used to model the frictional forces that develop along the metal-die interface and the coefficient of friction is assumed to be of order \(\varepsilon\). Analytical solutions for the first two terms in the expansions are obtained.
scientific article; zbMATH DE number 60716