Abstract
Increasing the durability of machines and equipment is very desirable today. It mainly applies for special and economically expensive applications. This can be achieved by new design of its parts. The aim of this research is to increase the durability of curved bodies with line contact by changing their shape. The durability of a rolling element with a fully crowned profile and a logarithmic profile were calculated using the contact stress at the point of contact obtained analytically on the basis of Hertz's theory and numerically using the finite element analysis. The durability was calculated analytically based on the theories of Lundberg-Palmgren, Ioannides-Harris and Zaretsky and then compared.
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