Investigation of the friction and noise of automotive rubber belt

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Author
Narravula, Vikram R.
Keyword
v-belts
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URI
http://hdl.handle.net/11122/11367
Abstract
The objective of this research was to study the frictional properties of an automotive v-ribbed belt-pulley system. In order to evaluate the friction and noise, a new test setup was constructed. The assembly was run under various environmental and operational conditions and the results were quantified, studied, and compared among themselves. The environmental conditions included dry interface and wet interface, conducted at both room temperature (23°C) and cold temperature ( -20°C). Operational parameters varied during the experiment were wrap angle, load attached, and acceleration. Frictional forces and associated noises generated were recorded. Some of the results generated were compared with previous research work, and the setup was also used to generate new data for conditions not previously studied. Dry room temperature results show close correlation with previous research. The presence of water in liquid state in the interface induces larger adhesion as water film in the interface changes friction mechanisms in the rubber belt-pulley interface. The high stiction of wet friction can lead to stick-slip vibrations and squeal noise. The theoretical stiction model for wet belt-pulley interface is presented. The stiction-related noise test is conducted, and the result is used to identify the spectrum pattern. The belt friction under cold conditions is found to have a higher value than that in room temperature conditions. The belt noise under cold conditions is found to have much higher squeal frequency than that in room temperature conditions.
Description
Thesis (M.S.) University of Alaska Fairbanks, 2011
Table of Contents
1. Introduction -- 1.1. Introduction -- 1.2. Review of research on rubber belt-pulley friction -- 1.3. Outline of research -- 2. Experimental setup design -- 2.1. Introduction -- 2.2. Experimental setup -- 2.3. Material -- 2.4. Procedure -- 3. Dry friction at room temperature -- 3.1. Introduction -- 3.2. Effect of varying wrap angle -- 3.3. Effect of varying dead load -- 3.4. Effect of varying acceleration -- 3.5. Discussions -- 3.6. Conclusion -- 4. Wet friction at room temperature -- 4.1. Introduction -- 4.2. Wet friction -- 4.3. Wet-to-dry friction -- 4.4. Discussion -- 4.4.1. Wet kinetic friction -- 4.4.2. Wet static friction -- 4.4.3. Wet-to-dry friction -- 4.5. Conclusion -- 5. Cold friction -- 5.1. Introduction -- 5.2. Friction of belt without ice film -- 5.3. Friction of belt with ice film -- 5.4. Discussion -- 5.4.1. Dry-cold friction -- 5.4.2. Cold friction with ice film -- 5.5. Conclusion -- 6. Noise analysis -- 6.1. Introduction -- 6.2. Dry-room temperature noise -- 6.3. Wet-room temperature noise -- 6.4. Cold noise -- 6.5. Discussion -- 6.6. Conclusion -- 7. Conclusion -- References.
Date
2011-05
Type
Thesis
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