A Comparison between Two Statistical Methods for Gear Tooth Root Bending Strength Estimation Starting from Pulsator Data

Due to their cost-effectiveness, pulsator tests are widely adopted as a testing methodology for the investigation of effects material and heat surface treatment on gear strength with respect tooth root fatigue fracture. However, since no meshing contact is present in tests, there differences between test case real-world application scenario where gears rotating under load. Those related both statistical phenomena. Over years, several methodologies have been developed order handle this problem. This article summarizes them proposes first comparison. complete comparison different estimation has conducted so far. aims partially cover gap, by presenting comparing proposed literature then via deeper two elaboration methodologies. methodologies, which examined same rig configuration, also discussed detail. The performed based an actual database composed 1643 data points from case-hardened gears, divided into 76 experimental campaigns. Good agreement estimated strengths was found. make further considerations about one methodology, providing additional validation defining specimen numerosity required.