22FTM13. Effect of Tooth Root Fillet Design on Tooth Root Stress in Short Fiber Reinforced Plastic Gears

ABSTRACT

The geometry of plastic gears is usually based on conventional steel gears, which are bound to the restrictions of the machining production of gears. The injection molding process provides more design freedom here. In this work, simulative results in terms of tooth root stress in plastic gears with various tooth root fillet designs are shown. The simulation method is based on finite element analysis and takes into account the different fiber orientation as well as the complex material behavior of short fiber reinforced plastics.

The analysis includes fully rounded, elliptical and bionic tooth root fillets. In addition to the tooth root stress in the initial state, results are also presented for the geometry changed by wear during operation.

Authors: Wassiem Kassem, Manuel Oehler, Oliver Koch

ISBN: 978-1-64353-133-5