Steel roller discs are an efficient mechanical tool for cutting soft to medium strength rocks in both civil and mining projects. However, ihcir application for hard rock cutting has been hin-dered since steel discs wear quickly and fail prematurely due to high concentrated stresses generated at the sharp corners and thin elements of the disc. To overcome this problem, the current gen-eratoion roller discs comprises a steel shaft connected to a tungsten carbide (WC) disc. In other words, while the material of the dosc itself is replaced by a stronger WC material, steel continues to be used for the shaft body.In this paper, to comprehend the influence of material parameters on the induced stresses inside different parts of a roller citter, an analytical closed-form solution and a series of finite element (FEM) numerical studies are performed. By considering the problem as a traction boundary-value problem in an elastic domain, (he analytical solution is based on the Airy stress formu-lation in Cartesian coordinates with a Fourier series representing tje boundary conditions. The analytical result is developed for bptj plane stress and plane strain conditions, encompassing all possible loading configurations and shaft geometries. To verify the numerical models, these results are also compared with labo-ratpry experimental data obtained from cutting granite using mini doscs for the penetration range 1 to 3 mm.
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