Resistance model of lunar regolith coring tube during penetration and particle transport mechanism
ZOU Shiyue1, 2, YANG Jiafeng1, 2, YUAN Zihao2, ZHAO Haifeng1, 2*, LI Xihan2, HAN Rujin2, NING Zhitao2, WANG Ke2
(1. University of Chinese Academy of Sciences, Beijing 100190, China;
2. Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100049, China)
Abstract：Supporting the design and performance prediction of lunar surface sampling systems, this study systematically investigates the axial resistance characteristics of coring tubes under direct and rotational penetration modes. Based on the bearing capacity theory of hollow pipe piles, a semi-empirical model for direct penetration is developed that accounts for the influence of wall thickness in small-diameter coring tubes. An experimental platform is established to measure the axial resistance force and sampling performance of coring tubes with varying geometric dimensions during penetration to a depth of 80?mm. Experimental results validate the model and reveal that annular resistance constitutes the dominant component. For rotational penetration, the dependence of the macroscopic friction coefficient on shear rate in the particle-metal interface is introduced. Theoretical and experimental evidence confirms that rotation significantly reduces axial resistance and improves both sampling success rate and sample length. Discrete element simulations using PFC elucidate the microscopic evolution of lunar soil particle flow and soil plug formation during rotational penetration, revealing the key factors governing sampling success. This study provides a theoretical basis and experimental support for structural design, actuator selection, and drilling parameter optimization in lunar surface sampling systems.
邹时越1，2，杨家峰1，2，袁子豪2，赵海峰1，2*，李奚晗2，韩如锦2，宁志涛2，王 珂2. 月壤采样管贯入阻力建模与颗粒迁移分析[J]. 岩石力学与工程学报, 2026, 45(9): 2796-2810.
ZOU Shiyue1, 2, YANG Jiafeng1, 2, YUAN Zihao2, ZHAO Haifeng1, 2*, LI Xihan2, HAN Rujin2, NING Zhitao2, WANG Ke2. Resistance model of lunar regolith coring tube during penetration and particle transport mechanism. , 2026, 45(9): 2796-2810.
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2026, Vol. 45 
