The most popular technique is the Finite Element Method (FEM), see, but now the number of computational approximation techniques is very large and a synthetic summary can be tried only by citing some of these less conventional methods: mixed finite element methods partition of unity-based discontinuous finite elements meshless methods discontinuous Galerkin methods. ![]() The subsequent step is the introduction of a numerical approximation technique. At present time the definition of a mathematical model is at the basis of any serious attempt to obtain previsions in any engineering application, but not only in the engineering field. The typical starting point is the formulation of a mathematical model where the main physical or real world phenomena to be described are established. The developing of finite element formulations, standard or new ones, requires a lengthy process which involves several steps.
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