Abstract
It is shown that wear intensity as applied to friction fatigue is governed by relative critical volume with wear. Equations are derived on the basis of energy and fatigue theories using the DBCV model. Similarity criteria are suggested for wear intensity and the life of friction assemblies. Combined indices and damage criteria for friction-mechanical fatigue, and also for the limiting condition of a metal-polymer power system constructed using the DBVC model are presented. Using them it is possible to calculate the reliability of assemblies which operate with repeated alternating loads and simultaneous sliding friction. Equations for calculated and experimental estimation of durability before main fatigue crack formation (life to the first stage of fretting fatigue) are obtained on the basis of a well-known model for fretting wear and the DBCV model. Some ideas for further studies are formulated.
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