The influence of structural inhomogenity of the material of the wheel pair axles of locomotives on the micro-mechanisms of the fatigue cracks growth

To assess the residual resource of the axles of wheel pairs of railway transport and predict their durability, it is necessary to take into account the features of the structural inhomogeneity of the material. The reason for the inhomogeneity in the material of wheel pair axles is their manufacturing technology. The regularities of fatigue crack propagation in the axle material of a wheel pair are summarize

Analysis of Fracture Characteristic of a Gas Main Pipe on the Basis of the Additive Mathematical Model of the Cyclic Random Process and Polynomial Function

The use of a mathematical model to describe the phenomenon of dynamic fracture of the gas main in a broad range of crack propagation rates is substantiated, taking into account the stochastic and cyclic nature of this process. Particular attention is paid to the reliability of the proposed approach, which is evaluated based on comparison with known natural experiments