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Article

Calibration of Discrete Element Method Parameters for a High-Fidelity Lunar Regolith Simulant Considering the Effects of Realistic Particle Shape

by
Ningxi Zhou
1,2,
Jian Chen
1,2,3,4,*,
Ning Tian
1,2,
Kaiwei Tian
1,2,
Juehao Huang
1,2 and
Peng Wu
1,2
1
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Hubei Key Laboratory of Geo-Environmental Engineering, Wuhan 430071, China
4
China-Pakistan Joint Research Center on Earth Sciences, Islamabad 45320, Pakistan
*
Author to whom correspondence should be addressed.
Materials 2024, 17(19), 4789; https://doi.org/10.3390/ma17194789
Submission received: 29 August 2024 / Revised: 23 September 2024 / Accepted: 25 September 2024 / Published: 29 September 2024

Abstract

The Discrete Element Method (DEM) is an important tool for investigating the geotechnical properties of lunar regolith. The accuracy of DEM simulations largely depends on precise particle modeling and the appropriate selection of mesoscopic parameters. To enhance the reliability and accuracy of the DEM in lunar regolith studies, this paper utilized the high-fidelity IRSM-1 lunar regolith simulant to construct a DEM model with realistic particle shapes and conducted an angle of repose (AoR) simulation test. The optimal DEM parameters were calibrated using a combination of the Plackett–Burman test, steepest ascent test, and Box–Behnken design. The results indicate that the sliding friction coefficient, rolling friction coefficient, and surface energy significantly influence the simulation AoR. By optimizing against the measured AoR using a second-order regression model, the optimal parameter values were determined to be 0.633, 0.401, and 0.2, respectively. Under these optimal parameters, the error between the simulation and experimental AoR was 2.1%. Finally, the calibrated mesoscopic parameters were validated through a lifting cylinder test, showing an error of 6.3% between the simulation and experimental results. The high similarity in the shape of the AoR further confirms the accuracy and reliability of the parameter calibration method. This study provides a valuable reference for future DEM-based research on the mechanical and engineering properties of lunar regolith.
Keywords: lunar regolith simulant; discrete element method; parameter calibration; particle shape; angle of repose lunar regolith simulant; discrete element method; parameter calibration; particle shape; angle of repose

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MDPI and ACS Style

Zhou, N.; Chen, J.; Tian, N.; Tian, K.; Huang, J.; Wu, P. Calibration of Discrete Element Method Parameters for a High-Fidelity Lunar Regolith Simulant Considering the Effects of Realistic Particle Shape. Materials 2024, 17, 4789. https://doi.org/10.3390/ma17194789

AMA Style

Zhou N, Chen J, Tian N, Tian K, Huang J, Wu P. Calibration of Discrete Element Method Parameters for a High-Fidelity Lunar Regolith Simulant Considering the Effects of Realistic Particle Shape. Materials. 2024; 17(19):4789. https://doi.org/10.3390/ma17194789

Chicago/Turabian Style

Zhou, Ningxi, Jian Chen, Ning Tian, Kaiwei Tian, Juehao Huang, and Peng Wu. 2024. "Calibration of Discrete Element Method Parameters for a High-Fidelity Lunar Regolith Simulant Considering the Effects of Realistic Particle Shape" Materials 17, no. 19: 4789. https://doi.org/10.3390/ma17194789

APA Style

Zhou, N., Chen, J., Tian, N., Tian, K., Huang, J., & Wu, P. (2024). Calibration of Discrete Element Method Parameters for a High-Fidelity Lunar Regolith Simulant Considering the Effects of Realistic Particle Shape. Materials, 17(19), 4789. https://doi.org/10.3390/ma17194789

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