The paper contains a proposal of a new model for the stress-life curve. The new model reflects the nature of the stress curve occurring under current conditions, which means its shape of an inclined letter S. It can be used for both low and high cycle fatigue. Verification of the proposed model...

The paper contains a description of fatigue life tests of titan-steel bimetal. The study involved specimens made of bimetal which was a combination of S355J2 steel and SB G1 265 titanium, which was imposed in the material by explosive cladding method. The research shows that the fatigue life of specimens made of native material, derived from cladded plate is less than the life of specimens of titanium-steel bimetal

This paper describes the method of operation and load control in research stands designed, constructed, produced and used in the Opole University of Technology for fatigue tests under cyclic bending, torsion, and a proportional combination of cyclic bending and torsion. All presented stands base on the same structure, however different drive systems allows performing tests with controlled amplitudes of load.