22FTM20. Enhanced Calculation Method for Tooth Flank Fracture Risk with Consideration of Tensile Residual Stresses in Larger Material Depths

ABSTRACT

Tooth flank fracture (TFF) is a gear fatigue failure mode, which is initiated in larger material depths beneath the active flank. Therefore, the residual stresses in larger material depths are decisive for TFF. In these larger material depths, the residual stress conditions are almost unknown up to now. This paper presents a calculation method to assess the residual stresses in gears. The calculated residual stress profiles also consider the existent tensile residual stresses in larger material depths. Based on these predicted residual stress profiles, calculation methods for TFF, including the standard calculation of ISO/TS 6336-4, were extended to consider not only compressive but also tensile residual stresses, which was not possible so far.

Authors: Daniel Müller, Thomas Tobie, Karsten Stahl

ISBN: 978-1-64353-140-3