Influence of gear surface roughness on the pitting and micropitting life (original) (raw)

2020, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Pitting and micropitting are the two main gear rolling contact fatigue modes. It is widely accepted that micropitting will lead to pitting; however, the relationship between pitting and micropitting life needs further investigation. In this work, micropitting and pitting tests were performed on an FZG back-to-back test rig using standard FZG PT-C and GF-C gears. The gear tooth profile change due to micropitting and pitting damage was measured in situ in the gearbox using a profilometer after each test. The gear surface roughness parameters were calculated from the measured tooth profile. A Gaussian low pass filter with cut off length [Formula: see text] mm was applied to the measured tooth profile to obtain the waviness. The calculated roughness parameters and the obtained tooth profile with waviness for each test were imported into the KISSsoft software to calculate the contact stress and specific film thickness at the corresponding load stage. Experimental results show that smooth...

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Analysis of Gear Damage Causes using Microhardness and Metallographic Testing

Proceedings of the 15th International Research/Expert Conference "Trends in the Development of Machinery and Associated Technology" TMT 2011, (S. Ekinović, J. Vivancos, E. Tacer, editors), pp 201-204, ISSN 1840-4944, Prague, Czech Republic, 12-18 September 2011, 2011