Document Type
Thesis - University Access Only
Award Date
2008
Degree Name
Master of Science (MS)
Department / School
Mechanical Engineering
Abstract
Modem advanced polymer composite materials have opened a new level of noiseless, lubricant free, high resilience and precision gearing in power and motion transmission. The proper understanding and prediction of gear failure is an important prerequisite for any reliable application. In this research, three dimensional dynamic stress-strain analyses of 20% short glass fiber reinforced nylon66 spur gear has been simulated using finite element approach. The computer simulation of the multi-axial stresses of a gear tooth under the dynamic loads for a complete working cycle has been performed under a specific geometry, operating condition, fiber orientation and volume fraction. The effects of fiber orientation and volume fraction on the strength of composite gears have been evaluated and compared to the dynamic stress-strain behavior with isotropic unreinforced nylon66 and steel gears. The tooth root region of a gear which usually experiences high stress and has the potential to failure has been carefully investigated. It was evidenced that reinforced nylon66 gear performed better than the unreinforced nylon in perspective of stress-strain analysis. Using the composite materials properties obtained by experiments, this computer simulated dynamic stress-strain analysis can be a useful tool for evaluating strength and predicting failure phenomena of the polymer composite gears.
Library of Congress Subject Headings
Gearing, Spur -- Testing
Strains and stresses
Polymeric composites
Finite element method
Format
application/pdf
Number of Pages
148
Publisher
South Dakota State University
Recommended Citation
Hossan, Mohammad Robiul, "Strength Evaluation of Polymer Composite Spur Gear by Finite Element Analysis" (2008). Electronic Theses and Dissertations. 1441.
https://openprairie.sdstate.edu/etd2/1441
