Methods and main results of Tribo-Fatigue tests

•New methods of complex wear-fatigue tests of the materials and elements of systems are presented.•Automatic SI-series machines as the new class of test equipment are described.•Interaction the processes of friction, wear and mechanical fatigue is discussed.•Dependence of friction coefficient on cyclic stresses by non-contact load is shown. The methods and machines for wear-fatigue tests developed in the framework of Tribo-Fatigue testing are described and are used for the experimental estimation of the mutual influences and joint effects of the processes of friction (including wear) and mechanical fatigue on the performance of materials and models of Tribo-Fatigue systems. A select number of the experimental results are presented, including unique results that allow the estimation of the regularities of the direct (influence of the conditions and processes of friction and wear upon the change in the fatigue strength characteristics) and back (influence of the cyclic stresses upon the change in friction and wear characteristics) Tribo-Fatigue effects.