A Numerical Analysis of Hybrid Spur Gears with Asymmetric Teeth: Stress and Dynamic Behavior

Hybrid gears are composed of high-strength steel, carbon fiber reinforced plastic (CFRP), and adhesive bond to join these materials. In this study, the effect of rack tip radius (TR), drive side pressure angle (DSPA), and rim thickness (RT) on the stress of hybrid gears is investigated numerically. In addition, the stress results of hybrid gears are compared with steel gears that are used for validation of the numerical results. Single tooth stiffness (STS) values are calculated based on tooth deformations obtained from numerical analyses. The 2-DOF model is used to observe the influence of DSPA and RT on the dynamic factor (DF) and static transmission error (STE). According to the results, increasing RT has a positive effect on stress, STS, and STE, while DSPA is effective on the dynamic factor at most.

Automated summary

In this study, the effect of rack tip radius, drive side pressure angle, and rim thickness on the stress of hybrid gears was investigated numerically. The stress results of hybrid gears were compared with steel gears for validation. The study found that increasing rim thickness has a positive effect on stress, single tooth stiffness, and static transmission error, while drive side pressure angle mainly affects the dynamic factor.