Abstract
A two-dimensional theoretical model is proposed for investigation of the fracture processes and assessing contact durability of solids subjected to cyclic contact. The model is based on the step-by-step calculation of fatigue crack propagation paths in the contact region which includes the criteria of local fracture of materials under complex stress-strain state, characteristics of fatigue crack growth resistance of materials and also presupposes the possible change of fracture mechanisms (mode II – mode I fracture mechanisms). Within the frames of the model the peculiarities of formation of such typical contact fatigue damages like pits and spalls in rolling bodies and edge cracks growth in the elements of fretting couples under conditions of sliding/sticking between them are investigated. Examples of assessing the life time by damages formation in the contact region are presented.
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