  We are interested in the control of forming processes for nonlinear material
models. To develop an online control we derive a novel feedback law and prove a
stabilization result. The derivation of the feedback control law is based on a
Laypunov analysis of the time-dependent viscoplastic material models. The
derivation uses the structure of the underlying partial differential equation
for the design of the feedback control. Analytically, exponential decay of the
time evolution of perturbations to desired stress--strain states is shown. We
test the new control law numerically by coupling it to a finite element
simulation of a deformation process.
