In this thesis, bending of a cantilever beam, loaded with vertical and horizontal force and moment at free end, is presented. The beam deforms into elasto-plastically. In the beginning of the text, contributions of other authors, who worked on the mentioned problem, are presented. Next, calculating procedure for deflections of elastic beam is presented, followed by the upgrade of the model into elastic-linear plastic and elastic-Ludwick plastic rheology model. In both models, the influence of elastic foundation is considered. The springback deflections are also studied. Our simple method for computing cantilever beam deflections can relatively easily be upgraded.