The results of the tests for a friction pair â??a cylindrical specimen made of\n0.45% carbon steel-a counter specimen-liner made of polytetrafluoroethylene F4-\nBâ? during sliding friction are presented. The test results at different levels\nof contact load are analyzed using the Archardâ??s equation and are presented\nas a friction fatigue curve. The concept of the frictional stress intensity\nfactor during sliding friction is introduced, and an expression that relates the\nwear rate to this factor and is close in shape to the Paris equation in fracture\nmechanics is proposed.
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