Material parameter curves in an advanced material model describing compaction of spray
dried cemented carbide powder are determined successfully based on a general approach
for material characterization of powder materials. Pressing forces from a production
machine and equivalent finite element (FE) calculations are used in inverse modelling.
A pressing method that includes multiple unloading steps is used. The material model
is of Drucker Prager CAP kind and friction between powder and pressing tool is modelled
as a function of normal pressure. The results are verified with density gradient measurements
using a neutron source. The method is proven to be robust and the results show good
agreement between experiment and simulation. Effects that have not been captured numerically
previously are captured due to the high accuracy of material characterization. The
present approach is detailed for tungsten carbide powders but is valid for other powder
materials when properly calibrated for constitutive and frictional effects in the
same manner as outlined here. (C) 2020 Published by Elsevier B.V.