On Modeling Drilling Load in Lunar Regolith Simulant

Drilling and coring, as effective ways to obtain lunar regolith along the longitudinal direction, are widely applied in the lunar sampling field. Conventionally, modeling of drill-soil interaction was divided into soil cutting and screw conveyance processes, ignoring the differences in soil mechanic...

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Bibliographic Details
Published in:Chinese journal of mechanical engineering 2018-12, Vol.31 (1), p.32-43, Article 20
Main Authors: Quan, Qi-Quan, Chen, Chong-Bin, Deng, Zong-Quan, Tang, Jun-Yue, Tang, De-Wei
Format: Article
Language:English
Subjects:
Bulldozers
Coring
Cutting
Drilling
Earth pressure
Electrical Machines and Networks
Electronics and Microelectronics
Engineering
Engineering Thermodynamics
Extrusion
Heat and Mass Transfer
Instrumentation
Iterative methods
Lunar surface
Machines
Manufacturing
Mechanical Engineering
Mechanical properties
Mechanism and Robotics
Model accuracy
Original Article
Passive pressure
Power Electronics
Processes
Regolith
Sampling
Soil mechanics
Soil properties
Soils
Space missions
Theoretical and Applied Mechanics
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Summary:Drilling and coring, as effective ways to obtain lunar regolith along the longitudinal direction, are widely applied in the lunar sampling field. Conventionally, modeling of drill-soil interaction was divided into soil cutting and screw conveyance processes, ignoring the differences in soil mechanical properties between them. To improve the modeling accuracy, a hypothesis that divides the drill-soil interaction into four parts: cuttings screw conveyance, cuttings extruding, cuttings bulldozing, and in situ simulant cutting, is proposed to establish a novel model based on the passive earth pressure theory. An iterative numerical calculation method is developed to predict the drilling loads. A drilling and coring testbed is developed to conduct experimental tests. Drilling experiments indicate that the drilling loads calculated by the proposed model match well the experimental results. The proposed research provides the instructions to adopt a suitable drilling strategy to match the rotary and penetrating motions, to increase the safety and reliability of drilling control in lunar sampling missions.
ISSN:1000-9345
2192-8258
DOI:10.1186/s10033-018-0207-8