This report describes a set of fundamental benchmark tests concerning finite element software for elastoplastic, stress analysis of planar and three—dimensional structures. In particular it is assumed that the plastic behaviour is described by the von Mises yield criterion with an associated flow rule. Geometric nonlinearities, rate and temperature effects are excluded. 

The report focuses mainly on constitutive model tests. Some nonlinear equation solution and incompressibilty tests are also presented. 
In the constitutive model tests three classes of plastic behaviour are considered : perfect plasticity, isotropic and kinematic hardening.