CONTACT ANALYSIS OF NOMINALLY FLAT SURFACES
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Authors
Shellock, Matthew R.
Subjects
Hertz
interface
contact
stress
deformation
fractal
electromagnetic rail gun
interface
contact
stress
deformation
fractal
electromagnetic rail gun
Advisors
Kwon, Young W.
Date of Issue
2008-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
A proper understanding of the mechanism of contact between two or more nominally flat surfaces is crucial in the design process of many devices. This thesis, using analytical and computational methods, models the former through the use of fractal characteristics at the contact interface. A parametric analysis of the fractal surface was completed in order to properly understand fractal geometry and its effect on surface properties. The fractal surface was simplified so that Hertz theory could be used to model surface deformation and resulting contact stresses. The data gathered from the model was then input into an existing electromagnetic rail gun program to study the contact surface effect on exit velocity, temperature, electrical conductivity, and contact area ratio. Finally, a study of the fractal parameter effects on the electromagnetic rail gun was completed.
Type
Thesis
Description
Series/Report No
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
xiv, 53 p.: ill. (some col.)
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.