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Friction and lubrication for nanometer-scale lubricant filmsGerhardstein, Joseph Peter 05 1900 (has links)
No description available.
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Temperature prediction in mechanical components, an analytical approachGecim, Burak 05 1900 (has links)
No description available.
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Coefficient of friction of painted structural steel surfacesDooley, Robert Thomas 08 1900 (has links)
No description available.
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The selection and testing of compression seal and chamber coating materials for the pivotal engine™.Miller, David J January 2006 (has links)
Wear and friction tests were conducted on a rotational tribometer to identify material
couples for compression seals and chamber coatings to extend the service life of the
Pivotal Engine™. Potential materials were identified based on reports in the literature
of successful use in similar environments. From the rotational tribometer tests, the
best material couple was found to be reaction bonded silicon nitride against a Sulzer
Metco F4301 plasma sprayed coating followed by a Total Seal TiN coated seal
against the F4301 coating. However, the performance predicted by the rotational
tribometer was not realised in a fired engine, where the TiN coated seal wore almost
as fast as an uncoated seal. This discrepancy was due to the large differences in
operating conditions between the rotational tribometer and the fired engine,
particularly the reciprocating motion of the engine. The different operating conditions
mean that the results from the rotational tribometer have little or no relevance actual
performance in the engine.
To overcome the limitations of the rotational tribometer a reciprocating tribometer
was designed and built. The performance predicted by the reciprocating tribometer
was much closer to the observed wear rates from the engine, particularly with the
Total Seal TiN coated seals. Some of the results from the reciprocating tribometer
were a direct-contradiction to those obtained on the rotational tribometer. When tested
on the rotational tribometer the nitrided stainless steel seal wear rate was lower than
that of the Mazda cast iron seal. However, on the reciprocating tribometer the Mazda
cast iron seal had a lower wear rate than the nitrided stainless steel seal. From the
testing conducted on the reciprocating tribometer the best material couple was found
to be Total Seal TiN coated seals on the F4301 chamber coating. However, this
material couple cannot be recommended to increase the seal life in the Pivotal
Engine™ because at the conclusion of a twenty hour test the Total Seal TiN coating
had worn through to the substrate. In addition to testing different materials, different
oils were tested while keeping the wear couple constant. The oil that offered the best
wear protection to both the seal and chamber coating was Castrol A747. These tests
showed that different oils have as much effect as different materials.
Even with the best material combinations (Total Seal TiN seal, F4301 chamber
coating) the seal wear rates in the Pivotal Engine™ are much higher than would be
expected in other engines. This leads to the hypothesis that the origin of high seal
wear in the Pivotal Engine™ is not due to material properties, but to design issues.
The most likely problem is distortion of the chamber, which causes high localised seal
loadings, and in turn causing high seal wear.
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Scale dependence in friction the transition from intimate contact to monolayer lubricated contact /Xu, Dewei, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
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Experiments on dynamic fracture and frictionLim, Jaeyoung, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
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77 |
Analytical modeling of non-uniform frictional sliding /Gorbatikh, Larissa G. January 2001 (has links)
Thesis (Ph.D.)--Tufts University, 2001. / Submitted to the Dept. of Mechanical Engineering. Adviser: Mark Kachanov. Includes bibliographical references (leaves 126-128). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
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78 |
Infrared measurements of surface temperatures during oscillating/fretting contact with ceramics /Weick, Brian L., January 1990 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 230-235). Also available via the Internet.
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79 |
Friction of air in small pipes and fittingsCody, Bejamin H. Allen, Ernest J. January 1911 (has links) (PDF)
Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1911. / The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed March 24, 2009)
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80 |
Kinetic friction of nonwetting dropsCarnasciali, Maria-Isabel. January 2008 (has links)
Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Neitzel, G. Paul; Committee Member: Allen, Mark G.; Committee Member: Degertekin, F. Levent; Committee Member: Schatz, Michael; Committee Member: Smith, Marc K.
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