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Gear Tooth Root Stresses of a Very Heavily Loaded Gear Pair-Case Study: Orbiter Body Flap Actuator Pinion and Ring GearThe space shuttle orbiter's body flap actuator gearing was assessed as a case study of the stresses for very heavily loaded external-internal gear pairs (meshing pinion and ring gear). For many applications, using the high point of single tooth contact (HPSTC) to locate the position of the tooth force is adequate for assessing the maximum tooth root stress condition. But for aerospace gearing such an approach may be inadequate for assessing the stress condition while also simultaneously minimizing mass. In this work specialized contact analyses and finite element methods were used to study gear tooth stresses of body flap actuator gears. The analytical solutions considered the elastic deformations as an inherent part of the solutions. The ratio for the maximum tooth stresses using the HPSTC approach solutions relative to the contact analysis and finite element solutions were 1.40 for the ring gear and 1.28 for the pinion gear.
Document ID
20150016602
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Krantz, Timothy L.
(NASA Glenn Research Center Cleveland, OH United States)
Handschuh, Robert F.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 28, 2015
Publication Date
August 2, 2015
Subject Category
Computer Programming And Software
Structural Mechanics
Mechanical Engineering
Report/Patent Number
GRC-E-DAA-TN20236
DETC2015-46274
Meeting Information
Meeting: 2015 ASME International Design Engineering Technical Conferences and Computers and Information in Engineering (IDETC/CIE) Conference
Location: Boston, MA
Country: United States
Start Date: August 2, 2015
End Date: August 5, 2015
Sponsors: American Society of Mechanical Engineers
Funding Number(s)
WBS: WBS 664817.02.03.02.02.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
finite element method
gears
actuators
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