Original scientific paper

Estimation of fatigue life of involute gearing pairs

Milan PERKUŠIĆ ; Faculty of Electrical Engineering, mechanical Engineering and Naval Architecture, University of Split, Croatia
Damir JELASKA ; Faculty of Electrical Engineering, mechanical Engineering and Naval Architecture, University of Split, Croatia
Srđan PODRUG ; Faculty of Electrical Engineering, mechanical Engineering and Naval Architecture, University of Split, Croatia

Abstract

The problem of determination of gear service life with regard to bending fatigue in a gear tooth root is analysed in this paper. The research is based on a computational model that consists of two parts. In the first part the period required for the crack initiation to occur is calculated, whereas in the second part the number of loading cycles required for crack propagation from the initial to the critical length is calculated. The computational model used in this paper makes it possible to calculate the number of cycles required for the fatigue crack initiation. Critical plane methods are used in the calculations and they make a correlation between the deformation and fatigue crack initiation period. The calculation of the stress cycles required for the fatigue crack propagation from the initial to the critical length is based on the principles of linear elastic fracture mechanics, where the fatigue crack propagation per stress cycle is dependent on the stress intensity factor in the crack peak

Keywords

Computational model; Crack propagation; Critical plane methods; Fatigue life; Overlap factors sum; Stress intensity factor

Hrčak ID:

97948

URI

https://hrcak.srce.hr/97948

Publication date:

31.10.2012.

Article data in other languages: croatian

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