Analysis of effect of bentleg opener geometry on performance in cohesive soil using the discrete element method
Article
Article Title | Analysis of effect of bentleg opener geometry on |
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ERA Journal ID | 3455 |
Article Category | Article |
Authors | Aikins, Kojo Atta (Author), Barr, James B. (Author), Antille, Diogenes L. (Author), Ucgul, Mustafa (Author), Jensen, Troy A. (Author) and Desbiolles, Jack M. A. (Author) |
Journal Title | Biosystems Engineering |
Journal Citation | 209, pp. 106-124 |
Number of Pages | 19 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | United kingdom |
ISSN | 1537-5110 |
1537-5129 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.biosystemseng.2021.06.007 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1537511021001318?via%3Dihub |
Abstract | Bentleg furrow openers can significantly reduce soil disturbance and reaction forces relative to conventional narrow point openers used in no-tillage farming. The effect of bentleg opener geometry on soil disturbance and reaction forces in a cohesive soil was assessed in a virtual soil bin using the discrete element method. Soil disturbance and reaction forces at an operating depth and a speed of 100 mm and 8 km h−1, were shown to be minimised by using (1) a shank lateral offset of 70 mm, (2) a side leg bend angle that ensures the elbow, which is the transition between the side leg and vertical shank, is not located below the soil surface, (3) an arched instead of angled elbow, (4) a cutting edge chamfer angle as low as practical, and (5) tine thickness as small as practical. Furrow size was found to be more dependent on shank lateral offset and side leg bend angle than side leg forward angle. Though side leg forward angles >90° reduce particle displacement and will work better in fields with stones and roots, they also considerably increase draught and penetration resistance. A low rake angled foot minimises soil reaction forces and drives soil loosening. Reducing foot height and interaction of the vertical shank with soil particles minimises surface soil displacement. These results have expanded the understanding of bentleg opener mechanics and are in close agreement with those reported for sandy soils. Therefore, similar criteria can be followed to optimise bentleg opener design for different soil types. |
Keywords | narrow point opener, no-tillage sowing, soil disturbance, soil reaction forces, vertosol |
ANZSRC Field of Research 2020 | 409901. Agricultural engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Agricultural Engineering |
University of South Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q696y/analysis-of-effect-of-bentleg-opener-geometry-on-performance-in-cohesive-soil-using-the-discrete-element-method
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