Static and Kinetic Friction Coefficients for Regolith Delivery into a Molten Regolith Electrolysis Reactor
Publication: Earth and Space 2022
ABSTRACT
The handling and transportation of rocky unconsolidated material (regolith) on celestial bodies, such as the lunar surface, is an important step for its utilization as a resource to meet manufacturing needs and achieve a sustained human presence on these bodies. Lunar regolith is considered a feedstock that must be delivered to processing reactors, like a molten regolith electrolysis (MRE) reactor, either as is or beneficiated prior to its transformation into usable commodities. The transportation of lunar regolith is difficult as it does not flow well, is abrasive, and can cause significant wear to parts and surfaces over long exposure periods. 110-H02 copper, 304 stainless-steel, nonporous alumina ceramic, and 6061 aluminum were all tested to determine short term scratch wear effects caused by exposure to lunar regolith simulant. This research investigates the change lunar regolith simulant imparts on these surfaces by calculating friction coefficients before, during, and after lunar regolith simulant exposure. This kind of parameterization is novel and will help set requirements for systems exposed or transporting lunar regolith simulant on the surface of the Moon.
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REFERENCES
Boles, W. W., Scott, W. D., and Connolly, J. F. (1997). “Excavation Forces in Reduced Gravity Environment.” Journal of Aerospace Engineering, 10(2), 99–103.
Colwell, J. E., Batiste, S., Horányi, M., Robertson, S., and Sture, S. (2007). “Lunar surface: Dust dynamics and regolith mechanics.” Reviews of Geophysics, 45(2).
Hartzell, C. M., and Carter, D. P. (2020). “Uncertainties in Regolith Tribocharging and Paths Forward.” The Impact of Lunar Dust on Human Exploration, 2141, 5028.
Iai, M., and Gertsch, L. (2013). “Excavation of Lunar Regolith with Large Grains by Rippers for Improved Excavation Efficiency.” Journal of Aerospace Engineering, 26(1), 97–104.
Kring, D. A. (2006). “Parameters of Lunar Soils.” Lunar Exploration Initiative. Accessed at https://www.lpi.usra.edu/science/kring/lunar_exploration/briefings/lunar_soil_physical_properties.pdf (March 2022).
Mantovani, J. G., and Townsend, I. I. (2013). “Planetary Regolith Delivery Systems for ISRU.” Journal of Aerospace Engineering, 26(1), 169–175.
Matsumoto, K., Suzuki, M., Nishida, S., and Wakabayashi, S. (2009). “Wear of Materials in Lunar Dust Environment.” Proc. 11th Int. Symp. on Materials in a Space Environment (ISMSE-11), September 15-18, 2009, Aix-en-Provence, France.
Rhodes, D. J., Farrell, W. M., and McLain, J. L. (2020). “Tribocharging and electrical grounding of a drill in shadowed regions of the Moon.” Adv. in Space Res., 66(4), 753–759
“Copper Rectangle Bar 110-H02.” Online Metals, (n.d.). < > (Feb. 3, 2022).
“Hardness Conversion Chart.” (n.d.). Kelly Pipe,<https://kellypipe.com/wp-content/uploads/2018/07/hardcon.pdf> (Feb. 3, 2022).
“Multipurpose 304 Stainless Steel Bar.” (n.d.). www.mcmaster.com, <https://www.mcmaster.com/8992K804/> (Feb. 3, 2022).
“Multipurpose 6061 Aluminum. ” (n.d.). www.mcmaster.com,<https://www.mcmaster.com/8975K578/> (Feb. 3, 2022).
“Nonporous Alumina Ceramic Sheet.” (n.d.). www.mcmaster.com, <https://www.mcmaster.com/8459K22/> (Feb. 3, 2022).
“GreenSpar.” (n.d.). hudsonresourcesinc.com, <https://hudsonresourcesinc.com/products/>.
Freund, R. J., Wilson, W. J., and Mohr, D. L. (2010). Statistical methods. Elsevier, Amsterdam; Boston.
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Earth and Space 2022
Pages: 106 - 119
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Published online: Jan 5, 2023
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