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Rampilla, Lokamanya Siva ManoharA FINITE ELEMENT APPROACH TO STRESS ANALYSIS OF FACE GEARS
Master of Science in Mechanical Engineering, Cleveland State University, 2012, Fenn College of Engineering
Face Gears have alternative gear-teeth configuration compared to Bevel Gears. Face Gear have a standard spur pinion as opposed to a bevel Gear. This work concentrates on modeling of a Face-gear, Meshed with a spur gear, using CAD Software and Finite Elements Analysis. The bending stress developed at the gear teeth is determined. Numerical results are validated using the bending stress developed between two involute spur gears.

Committee:

Majid Rashidi, PhD (Committee Chair); Rama S. R. Gorla, PhD (Committee Member); Asuquo Ebiana, PhD (Committee Member)

Subjects:

Aerospace Engineering; Design; Mechanical Engineering

Keywords:

face gear; Hygear; straight bevel gear; helicopter transmission; analysis

Prewitt, Thomas JosephQuasi-static, Deformable-body Analysis of a Face Gear-Thrust Bearing System
Master of Science, The Ohio State University, 2012, Mechanical Engineering
Face gears are cross-axis gear drives with much simpler geometries and manufacturing process in comparison to other cross-axis gearing such as spiral bevel and hypoid gears. Face gears can provide high power density solutions with high gear ratios. These advantages come with issues associated with rim and web deflections of the large face gear. In aerospace applications where weight of the gearbox is a major concern, web deflections become more challenging. This study explores the feasibility of incorporating a thrust bearing with a face gear drive to remedy rim deflection effects in a compact and light-weight manner. A baseline face gear pair is defined in this study where the face gear is supported by a conical web that is used to preload a rolling element thrust bearing axially to limit gear deflections under load. A state-of-the-art contact mechanics software package is used to analyze this baseline system to identify potential problems. A detailed parametric study covering basic bearing parameters, face gear geometry parameters, axial preload and gear tooth modifications is performed to determine conditions and design approaches that can remedy some of these problems. These results are compiled at the end into simplified guidelines for the face gear drive design.

Committee:

Ahmet Kahraman (Advisor); Sandeep Vijayakar (Committee Member)

Subjects:

Engineering; Mechanical Engineering

Keywords:

Face Gear; Quasi-static; Deformable-body Analysis; Finite Element Analysis; Thrust Bearing; FEA; Transmission3D