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Investigation into failure mechanisms of lunar regolith simulant under thin-walled drilling tool with critical parameters

Authors: GAO Zheng; GAO Mingzhong; HAO Haichun; WU Yan; CAO Jinfeng; SUN Qichen; GONG Junshan; ZHOU Lang; ZHOU Xuemin

DOI: 10.1016/j.ijmst.2025.05.004Status: Verified Translated Edition
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Key Findings in This Report

• Thin-walled coring bits outperform conventional thick-walled bits for deep lunar regolith sampling, with Bit D showing optimal performance. • An operational feed-to-rotation ratio (FRR) window of 2.0–2.5 balances drilling load and core recovery rate. • A novel theoretical framework for dynamic drilling load parameters was developed and experimentally validated. • Practical strategies for mitigating drilling-induced disturbances include parameter optimization and bit structural improvements.