Stress Analysis Of Gears

This paper reviews the contact and bending stress predicted with four involute gear geometries and proposes recommendations for stress calculations, including a modification to contact ratio factor Zε which is used to predict contact stress and revisions to form factor YF and helix angle factor Yβ which are cited to evaluate bending stress.


The results suggest that there are some significant deviations in predicted bending and contact stress values between proposal methods and original ISO standard.  However, before the ISO standard is changed, the paper recommends that allowable stress numbers published in ISO 6336-5 are reviewed because the mechanisms that initiate bending and contact fatigue have also changed and these require updating.


Comparative study of stress analysis of gears with different helix angle using the ISO 6336 standard and tooth contact analysis methods.


published on: 16th February 2017