  A variational model of pressure-dependent plasticity employing a
time-incremental setting is introduced. A novel formulation of the dissipation
potential allows one to construct the condensed energy in a variationally
consistent manner. For a one-dimensional model problem, an explicit expression
for the quasiconvex envelope can be found which turns out to be essentially
independent of the original pressure-dependent yield surface. The model problem
can be extended to higher dimensions in an empirical manner. Numerical
simulation exhibit well-posed behavior showing mesh-independent results.
