Circular holes as sources of stress concentration in the parts of machines and devices used in mining

This work discusses the impact of circular forms on stress distribution in the parts of machines and devices used in mining, since it represents a typical source of stress concentration. The stress distribution around the hole, as a source of stress concentration, is significantly affected both by the hole size and type of material and its shape and position relative to the direction of external load effect. The aim of this work is to analyze the impact of circular holes, as a source of stress concentration, on the stress distribution since a large number of parts of which the machines and devices used in mining are made, is impaired by the stress. The work discusses only the parts made of isotropic material, because the practice has shown that most of the parts of which machines and devices used in mining are assembled, are made of isotropic materials. To obtain the results of stresses distribution in a plane isotropic field weakened by the holes, analytical and numerical methods were used.