Ono, Shoko und Lichtenheldt, Roy und Yoshida, Kazuya (2021) Stress Analysis of Soil Beneath Wheel for Planetary Rover by Using Discrete Element Method. In: 7th International Conference on Particle-Based Methods: Fundamentals and Applications, PARTICLES 2021. International Center for Numerical Methods in Engineering (CIMNE). VII International Conference on Particle-Based Methods (PARTICLES 2021), 2021-10-04 - 2021-10-05, Hamburg, Germany.
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Kurzfassung
Modeling the interaction between rover's wheel and soft terrain is of great importance in predicting or evaluating wheel performance for lunar and planetary rovers. The current wheel-soil interaction models predict or evaluate wheel performance under certain conditions. However, most of them do not consider the soil flow and deformation, and thus, they cannot capture the physical phenomena of wheel-soil interaction. Developing a new model that includes such physical phenomena contributes to the improvement of prediction accuracy. To develop such a model, it is necessary to analyze soil flow and deformation beneath the wheel. This study analyzes the stress distributions in the soil and soil flow fields beneath the grouser wheel by performing experiments using the discrete element method (DEM) with the particle simulation tool "Sir partsival". In addition to the single wheel simulation, two simple test simulations - an angle of repose test and a shear test - are performed to confirm the soil flow fields and stress distributions in the soil. In the field of fluid dynamics, (shear) stress generally exists along high gradients of flow velocity. These two tests confirm if the soil stress shows the same trend. The wheel simulations are performed under several slip conditions to investigate their influences on soil flow characteristics. The shape of the soil flow region - the shape of the slip line - can be divided into two patterns depending on the slip conditions. The stress increases along the slip line in all simulations. The findings of this study contribute to understanding the relationship between soil velocity field and stress distribution in the soil.
elib-URL des Eintrags: | https://elib.dlr.de/148392/ | ||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||
Titel: | Stress Analysis of Soil Beneath Wheel for Planetary Rover by Using Discrete Element Method | ||||||||||||||||||||||||
Autoren: |
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Datum: | 5 Oktober 2021 | ||||||||||||||||||||||||
Erschienen in: | 7th International Conference on Particle-Based Methods: Fundamentals and Applications, PARTICLES 2021 | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
Herausgeber: |
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Verlag: | International Center for Numerical Methods in Engineering (CIMNE) | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | Discrete Element Method, Planetary Rover, Wheel-Soil Interaction, Soil Flow, Stress Distribution | ||||||||||||||||||||||||
Veranstaltungstitel: | VII International Conference on Particle-Based Methods (PARTICLES 2021) | ||||||||||||||||||||||||
Veranstaltungsort: | Hamburg, Germany | ||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||
Veranstaltungsbeginn: | 4 Oktober 2021 | ||||||||||||||||||||||||
Veranstaltungsende: | 5 Oktober 2021 | ||||||||||||||||||||||||
Veranstalter : | International Centre for Numerical Methods in Engineering Barcelona (CIMNE) | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||
HGF - Programmthema: | Robotik | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | R RO - Robotik | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Intelligente Mobilität (SR) [RO] | ||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Systemdynamik und Regelungstechnik > Raumfahrt-Systemdynamik | ||||||||||||||||||||||||
Hinterlegt von: | Stubbig, Leon | ||||||||||||||||||||||||
Hinterlegt am: | 19 Jan 2022 15:08 | ||||||||||||||||||||||||
Letzte Änderung: | 13 Nov 2024 15:24 |
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