eng Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 2017-12-15 5 6 269 273 10.12691/ajme-5-6-7 AJME2017567 article Patrik Šarga patrik.sarga@tuke.sk 1 Štefan Beck 1 František Trebuňa 1 Technical University of Košice, Faculty of Mechanical Engineering, Letná 9, 042 00 Košice, Slovak Republic The design and manufacture of bend testing machine for testing the properties of materials is addressed by several reputable companies. However, their portfolios include commonly used devices with a similar design [1,2]. However, determination of the residual stresses by the MTS-3000 Ring-Core system requires atypical measurement conditions, so it is not possible to use a commonly produced and available bend testing machine. For this reason, there was a need to design a bend testing machine that would meet all the required measurement conditions. http://pubs.sciepub.com/ajme/5/6/7/ajme-5-6-7.pdf residual stresses Ring-Core method bend testing machine