The article discusses the possibility of the first phase of evaluation of durability of welded connection of the driving drum of belt conveyor – definition of the number of cycles before the nucleation of microcracks. Evaluation is made using a strain of fatigue failure criterion based on an analysis of the deformation of the Cree-O fatigue. These curves are described by Baskvina-Manson-Coffin. To solve the problem of assessing the durability curves of the number of cycles of crack from the strain amplitude curves are translated into the number of cycles of stress amplitude. On the basis of the available experimental data recalculation strain amplitude in the amplitude of the stresses and the dependence, for which the suggested approximating expression with the corresponding constants. Experimental data have a large dispersion, so the built linear regression dependence corresponding expectation and highlighted areas corresponding 95% confidence intervals.

Keywords

Conveyor belt, microcracks, drive drum, durability of the welded joint, finite element method, fatigue.