The extrapolation of the Drucker–Prager/Cap material parameters to low and high relative densities

The present study explores new approaches to extract Drucker–Prager/Cap (DPC) constitutive model parameters at low and high densities of compacted powders for which it is not possible to get solid, undamaged samples for model calibration purposes. Extrapolations were carried out by invoking a number of physically plausible assumptions for high density conditions and the addition of the experimental shear cell testing procedure for low density...