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Title Enhancement of a Rolling Resistance Rig for Force and Moment Testing of Tires
URL
Publication Date
Date Accessioned
Degree MS
Discipline/Department Mechanical Engineering
Degree Level masters
University/Publisher Virginia Tech
Abstract Tire testing has been one of the important aspects of the tire industry because it helps identify the tire behavior which further helps in improving the design of tires. It also helps automotive manufacturers choose the best tire for their automobiles. Indoor tire testing helps in relating the data better because of greater repeatability of the testing setup as compared to outdoor testing. This study focusses on modifying a rolling resistance machine to make it capable of force and moment and cleat testing along with the standard rolling resistance test. Additionally, the design of a mechanical loading mechanism (used to apply normal force on the tire) in place of the previous one using dead weights is also discussed. This study also talks about the structural and vibrational finite element analysis of a tire testing machine. Since the machine was designed to conduct different tire tests, different structural requirements of the tire positioning mechanism pertaining to each test were taken into consideration, and the structure was analyzed for maximum forces and moments acting on the assembly. Cleat testing subjects the tire as well as the structure to an impulse force which calls for the vibrational analysis of the assembly to avoid the structure from resonating. The design was modified to get it easily manufactured and assembled. These design changes and the aspects taken into consideration have also been discussed.
Subjects/Keywords tire testing machine; force and moment test; rolling resistance test; cleat test; tire positioning mechanism; loading mechanism
Contributors Taheri, Saied (committeechair); West, Robert L. (committee member); Sandu, Corina (committee member)
Rights In Copyright
http://rightsstatements.org/vocab/InC/1.0/
Country of Publication us
Record ID handle:10919/71421
Repository vt
Date Indexed 2020-10-14
Grantor Virginia Polytechnic Institute and State University
Issued Date 2016-06-23 00:00:00
Note [degree] Master of Science;

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…Figure 3: Effect of Surface Curvature on Camber Angle [4].............................................. 6 Figure 4: Average Rolling Resistance for a Tire on Different Surfaces [2]. ...................... 7 Figure 5: Cornering Force vs…

…industry. This makes tire testing an important part of the tire as well as automotive industry. Different testing setups are available for measuring the forces and moments generated by the tire, rolling resistance of tires, endurance testing of tires…

…day to cater for the market needs. This work talks about a new tire testing machine designed to conduct force and moment test, rolling resistance test and cleat test for passenger car tires and light truck tires. The design of the machine and the…

…testing is the cheapest and fastest way to evaluate the performance of a tire. Different tire properties are studied using the data generated from tire testing. A few examples of tire testing machines are: tire force and moment machine, rolling resistance

…suspension systems. This data is also helpful in developing mathematical tire models. Rolling resistance of a tire adversely affects the fuel efficiency of a vehicle. With fuel efficiency being one of the most critical aspects regarding the popularity of a…

…car, automotive manufacturers want it to be as low as possible. The energy lost in overcoming the rolling resistance can be determined by doing rolling resistance tests and also the impact of different parameters like tire inflation pressure, tire

…studies present conflicting results about the effect of the drum curvature on the measured tire forces and moments. Even though the rolling resistance obtained using drums is less than the values obtained using a flat surface, conversion factors have been…

…function of the individual tire and no generic conversion factor has been found to convert the values into data representative of a flat surface. On the other hand, the rolling resistance is shown to increase with decreasing drum diameter as shown in the…

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