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Instrument for in situ study of rolling under normal load and torque.
Milosz K Rajchel1, Michael Varenberg1, Michael J Leamy1
1The Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
The Review of Scientific Instruments
|October 1, 2022
Summary
This study introduces a novel instrument to analyze roller instabilities, enhancing understanding of energy loss and service life issues in moving solid rollers and airless tires.
Area of Science:
- Mechanical Engineering
- Materials Science
- Tribology
Background:
- Instabilities at the contact interface of moving solid rollers and airless tires cause significant energy losses and reduce component lifespan.
- Understanding the root causes of these instabilities is crucial for improving efficiency and durability.
Purpose of the Study:
- To present a novel instrument designed for detailed monitoring of roller mechanics.
- To provide deeper insights into the origins of contact interface instabilities in rollers and tires.
Main Methods:
- Simultaneous acquisition of force, displacement, and optical data.
- Utilizing high-speed cameras to capture local deformation fields in two planes.
- Employing various loading configurations: static normal, free rolling, and rolling with torque.
Main Results:
- The instrument successfully measured contact interface width under normal loading.
- Strain fields on the roller sidewall and contact interface were analyzed.
- Roller's resistance to motion was quantified under free and forced rolling conditions.
Conclusions:
- The developed instrument offers comprehensive monitoring of local and global roller mechanics.
- This capability aids in understanding and mitigating instabilities in rolling contact interfaces.
- The findings contribute to improving the design and performance of rollers and airless tires.
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