Nonlinear possibilities ========================== Laws of behavior --------------------- The laws of behavior (classical models, local models with damage, models for concrete and soils,...), usable under COMPORTEMENT in STAT_NON_LINE and DYNA_NON_LINE, under the keyword RELATION, are described in detail in the document 'Nonlinear behaviour' [:external:ref:`U4.51.11 `]. Deformations ------------ The deformations that can be used under COMPORTEMENT in STAT_NON_LINE and DYNA_NON_LINE, under the keyword DEFORMATION, are described in detail in the document 'Nonlinear behaviour' [:external:ref:`U4.51.11 `].