Nonlinear mechanics ====================== [:ref:`U2.04.01 `] Tips for using STAT_NON_LINE [:ref:`U2.04.02 `] Tips for implementing non-linear calculations [:ref:`U2.04.03 `] Choice of elasto- (visco) -plastic behavior [:ref:`U2.04.04 `] Contact user manual [:ref:`U2.04.07 `] Use of transient resolution methods for highly nonlinear, almost static problems [:external:ref:`U2.06.13 `] General tips for using the DYNA_NON_LINE operator [:ref:`U2.10.01 `] Instructions for using the coupling between Code_Aster and the Zmat and UMAT behavioral law modules