Inverse problems of damage mechanics for a hub of a friction pair

Abstract

We consider a problem of fracture mechanics for a hub of a friction pair during operation. It is assumed that near the friction surface the hub has a rectilinear crack of length 2' 1. A criterion and a method for solving the inverse problem of fracture mechanics on definition of the function of displacements of external contour points of the hub of a friction pair with regard to temperature drop in the details of friction pair is given. The found function of displacements of external contacts points of the hub provides increase of load-carrying capacity of the friction pair. Calculation for a friction pair applied to the borehole sucker-rod oil pumps was considered as an example.

Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution

“…This implies that delamination occurs in greater extent. This is in agreement with the results of calculations of the abrasive wear for the velocity of the friction pair element motion V = 0.2, 0.5, and 1.0 m/s obtained by Mirsalimov and Akhundova (2018). By increasing velocity, the abrasive wear decreases and tends to level along the contact zone.…”

“…They included the fatigue load and critical-plane Smith-Watson-Topper (Mohd Tobi et al., 2009) fatigue parameter for Ti-6Al-4 V. The proposed approach can be used to study the frictional behavior of fretting fatigue which occurs in a wide range of practical applications. Although literature review (Chowdhury et al., 2018) shows many fretting fatigue damage studies, there are a few simulation works which were validated using the experimental results (Hojjati-Talemi et al., 2014; Mirsalimov and Akhundova, 2018; Si-Jian et al., 2018; Sun et al., 2017; Tahmasebi and Emadoddin, 2013) since the evolution of damage is so complicated.…”

Inverse problem of contact fracture mechanics for a hub of friction pair taking into account thermal stresses

“…In the contemporary stage of engineering the optimal design of the friction pair, details providing an increase of efficiency of friction pairs are of great value [7–31]. The theoretical analysis on the determination of interference of the jointed cylinder, providing minimization of the abrasive wear of the friction unit, was carried out by Gadzhiev and Mirsalimov [7].…”

“…In Mirsalimov and Akhundova [30], the theoretical analysis of the displacement function for external contour points of the hub of a frictional pair, providing the absence of the initial wear and tear, which takes place toward the end of the bedding period, is carried out. A criterion and a method for solving the inverse problem of fracture mechanics on definition of the function of displacements of the external contour points of the hub of a friction pair with regard to temperature drop in the friction pair are given by Mirsalimov and Akhundova [31].…”

“…In the above studies on the optimization of friction pairs, the presence of a crack in the hub of the friction pair was not taken into account. In Mirsalimov and Akhundova [31], the problem of the optimization of friction pairs in the presence of a rectilinear crack in the hub is first considered in a simplified formulation. In Mirsalimov and Akhundova [31] it is assumed that the friction surface is absolutely smooth.…”