Double cup extrusion test

Experimental friction test (Bushhausen /Altan -Ohio State University - 1992).
Mean friction coefficient is deduced from the comparison of experimental and numerical (FEM) “cup height ratios” h1/h2 ( =1 if frictionless).
Frictional conditions close to the forging process:
- Interface pressure ~ 2500MPa.
- Surface temperature ~600°C.
- Surface enlargement ~3000%.
Typical numerical simulation needs remeshing.

Comparison with FE results obtained using Deform2D (and remeshing).

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