The thesis work is set in development and extension of MUL2 micromechanics code, based on CUF, or well known as Carrera Unified Formulation. Carrera Unified formulation is a class of theories of Structure on which Finite Elements are formulated. Its main aim is to lighten FEM analysis computational costs and to cover a wide range of field of application. The thesis work is focused on applying CUF to metamaterials analysis, it could be divided into four main parts: 1.Training: one month-long period spent to learn about how to use MUL2 micromechanics code, namely how to create input files and to become familiar with \textit{Fortran} programming language.