  We study global regularity of nonlinear systems of partial differential
equations depending on the symmetric part of the gradient with Dirichlet
boundary conditions. These systems arise from variational problems in
plasticity with power growth. We cover the full range of exponents $p \in
(1,\infty)$. As a novelty the degenerate case for $p>2$ is included. We present
a unified approach for all exponents by showing the regularity for general
systems of Orlicz growth.
