Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 4 7 2016 12 17 Possibilities of Optimizing the Shape and Geometry of Castellated Beams Using Numerical and Experimental Modeling 357 362 EN Miroslav Pástor Jozef Bocko Tomáš Kula Department of Applied Mechanics and Mechanical Engineering, Technical University of Košice, Faculty of Mechanical Engineering, Letná 9, Košice, 04200, Slovakia Cosmin-Stefan Roszkos AJME20164722 10.12691/ajme-4-7-22 2016 8 17 2016 10 21 2016 12 15 The article discusses about numerical methods and physics experiment for studying stress fields caused by defined load on beam. Examined the behavior of material under various modes load at individual types of beams. The results are compared, and then the right conclusions are drawn, that it is possible to verify the physical experiment and numerical calculation. For physical experiment was used transmission photoelasticimetry.