Problems of contact adaptability in conditionally fixed connections

In the contact area of conditionally fixed joints under cyclic loads, partial slip zones arise. Mutual movement of contact surfaces is accompanied by fretting processes, which inevitably leads to wear and destruction of contact elements. The article presents the direction of tribology, in which the theory of contact adaptability develops - a phenomenon in which sliding in the contact area ceases or significantly decreases after the first few load cycles. The similarity of the behavior of such systems with elastoplastic bodies [1, 2] led various authors to suggest that they can be applied to the Melan theorem [3], that is, to assume the existence of a field of residual stresses that prevents further sliding.