The manufacturing of sheet metal using cold deformation has been developed quickly and has an huge rate of growth especially in aeronautics and automotive industry because the possibility to manufacturing complex forms of products. In this sense in last decade the scientists are focused on the more exactly describing and phenomena approximation of sheet metals cold deformation capacity and the implementing of technical processes. For this goal the design of Forming Limit Stress Diagram play an essential role. The design of F.L.S.D. depends on strains and has importance because eliminate the deformation path. In the papers are presented as samples the data gathered for aluminum sheet metals.
