Nonlinear possibilities ========================== Law of behavior -------------------- The law of behavior specific to this modeling, usable under COMPORTEMENT in STAT_NON_LINE and DYNA_NON_LINE, is the relationship ELAS_POUTRE_GR (Cf. [:external:ref:`U4.51.11 `]). Deformations ------------ Only the 'GROT_GDEP' deformation allowing the beams to be treated in large movements and in large rotations is available (Cf. [:external:ref:`U4.51.11 `]). The deformations used in the behavioral relationship are the deformations of GREEN - LAGRANGE.