Abstract Lunar regolith demonstrates a high angle of internal friction due to particle angularity and apparent cohesion due to interparticle short-range interaction in lunar environment. This paper investigates the mobility of lunar rovers under partial gravity. A high-efficient contact model of lunar regolith that fuses rolling resistance and van der Waals forces was employed in the distinct element analyses of model wheel tests. Soil behavior and wheel performance under an extraterrestrial environment were analyzed in comparison with that under a terrestrial environment. Results indicate that van der Waals forces enhance the macroscopic shear strength of lunar soils particularly under low confining pressures associated with microgravity conditions. In the extraterrestrial environment, the mobility of a lugged wheel becomes not as well as expected due to more slippage and sinkage than that in the terrestrial environment, while it moves more efficiently in view of tractive efficiency. Increased slip ratio and sinkage on the lunar surface are attributed to loosely packing of soil particles in microgravity conditions, where reduced wheel load plays only minor role in improving the mobility of the wheel. Van der Waals forces between soil grains are beneficial to the wheel performance due to increased strength in soils, while this contribution is overwhelmed by the effect of largely reduced confining pressure in soils due to partial gravity on the Moon.

    Highlights The contact model fuses interparticle rolling resistance and van der Waals forces. Wheels suffer more from slippage and sinkage on the Moon than on the Earth. Wheels travel more efficiently on the Moon than on the Earth. Van der Waals forces are beneficial to wheel performance. Contribution of van der Waals forces is overwhelmed by reduced confining pressure.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Distinct element simulation of lugged wheel performance under extraterrestrial environmental effects


    Beteiligte:
    Jiang, Mingjing (Autor:in) / Liu, Fang (Autor:in) / Shen, Zhifu (Autor:in) / Zheng, Min (Autor:in)

    Erschienen in:

    Acta Astronautica ; 99 ; 37-51


    Erscheinungsdatum :

    2014-02-12


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    LUGGED TIRE

    MINAMI HIROBUMI | Europäisches Patentamt | 2017

    Freier Zugriff

    Behaviour Of Soil Unter Lugged Wheel

    Wu,S.W. / Hu,J.H.,Wong,J.Y. / Transport Technology Research Lab.,Carleton Univ.,CA | Kraftfahrwesen | 1984


    PLANETARY WHEEL DRIVE SINGLE WALL LUGGED OUTPUT CARRIER

    MARTIN SCOTT / LI YICHEN / RICHARDS MATTHEW et al. | Europäisches Patentamt | 2018

    Freier Zugriff

    PLANETARY WHEEL DRIVE SINGLE WALL LUGGED OUTPUT CARRIER

    MARTIN SCOTT / LI YICHEN / RICHARDS MATTHEW et al. | Europäisches Patentamt | 2021

    Freier Zugriff