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Discrete element modeling of a vibratory subsoiler
Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2007.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2008
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| _version_ | 1867614074786807808 |
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| access_status_str | Open Access |
| author | Van der Linde, Jaco |
| author2 | Els, D. N. J. |
| author_browse | Els, D. N. J. Van der Linde, Jaco |
| author_facet | Els, D. N. J. Van der Linde, Jaco |
| author_sort | Van der Linde, Jaco |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2007. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2865 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:46:15.146Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2865 Discrete element modeling of a vibratory subsoiler Van der Linde, Jaco Els, D. N. J. University of Stellenbosch. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Dissertations -- Mechanical engineering Theses -- Mechanical engineering Agricultural machinery -- Design and construction Agricultural machinery -- Vibration Plows -- Vibration Soil ripping Mechanical and Mechatronic Engineering Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2007. Vibrating a tillage tool is an effective way of reducing the draft force required to pull it through the soil. The degree of draft force reduction is dependent on the combination of operating parameters and soil conditions. It is thus necessary to optimize the vibratory implement for different conditions. Numerical modelling is more flexible than experimental testing and analytical models, and less costly than experimental testing. The Discrete Element Method (DEM) was specifically developed for granular materials such as soils and can be used to model a vibrating tillage tool for its design and optimization. The goal was thus to evaluate the ability of DEM to model a vibratory subsoiler and to investigate the cause of the draft force reduction. The DEM model was evaluated against data obtained from field testing done with a full scale single tine vibratory subsoiler. Soil testing was also done for material characterization and for the calibration of DEM material properties. The subsoiler was simulated using a commercial code, PFC3D. The effect on the simulation results of particle diameter, different bonding models and damping models was investigated. The final simulations were evaluated against the experimental results in terms of the draft force and material behaviour. The cause of the draft force reduction due to vibration was also investigated with the aid of the DEM model. From the results it was concluded that DEM is able to model the vibratory subsoiler for its design and optimization. The DEM model also provided valuable insight into the cause of the draft force reduction such as the increased peak stresses due to vibration and the increase in particle kinetic energy. 2008-04-14T10:31:01Z 2010-06-01T09:00:21Z 2008-04-14T10:31:01Z 2010-06-01T09:00:21Z 2007-12 Thesis http://hdl.handle.net/10019.1/2865 en University of Stellenbosch 10538178 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Dissertations -- Mechanical engineering Theses -- Mechanical engineering Agricultural machinery -- Design and construction Agricultural machinery -- Vibration Plows -- Vibration Soil ripping Mechanical and Mechatronic Engineering Van der Linde, Jaco Discrete element modeling of a vibratory subsoiler |
| title | Discrete element modeling of a vibratory subsoiler |
| title_full | Discrete element modeling of a vibratory subsoiler |
| title_fullStr | Discrete element modeling of a vibratory subsoiler |
| title_full_unstemmed | Discrete element modeling of a vibratory subsoiler |
| title_short | Discrete element modeling of a vibratory subsoiler |
| title_sort | discrete element modeling of a vibratory subsoiler |
| topic | Dissertations -- Mechanical engineering Theses -- Mechanical engineering Agricultural machinery -- Design and construction Agricultural machinery -- Vibration Plows -- Vibration Soil ripping Mechanical and Mechatronic Engineering |
| url | http://hdl.handle.net/10019.1/2865 |
| work_keys_str_mv | AT vanderlindejaco discreteelementmodelingofavibratorysubsoiler |