Journal article
Defining the effect of sweep tillage tool cutting edge geometry on tillage forces using 3D discrete element modelling
Information Processing in Agriculture, Vol.2(2), pp.130-141
01/09/2015
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Abstract
The energy required for tillage processes accounts for a significant proportion of total energy used in crop production. In many tillage processes decreasing the draft and upward vertical forces is often desired for reduced fuel use and improved penetration, respectively. Recent studies have proved that the discrete element modelling (DEM) can effectively be used to model the soil–tool interaction. In his study, Fielke (1994) [1] examined the effect of the various tool cutting edge geometries, namely; cutting edge height, length of underside rub, angle of underside clearance, on draft and vertical forces. In this paper the experimental parameters of Fielke (1994) [1] were simulated using 3D discrete element modelling techniques. In the simulations a hysteretic spring contact model integrated with a linear cohesion model that considers the plastic deformation behaviour of the soil hence provides better vertical force prediction was employed. DEM parameters were determined by comparing the experimental and simulation results of angle of repose and penetration tests. The results of the study showed that the simulation results of the soil-various tool cutting edge geometries agreed well with the experimental results of Fielke (1994) [1]. The modelling was then used to simulate a further range of cutting edge geometries to better define the effect of sweep tool cutting edge geometry parameters on tillage forces. The extra simulations were able to show that by using a sharper cutting edge with zero vertical cutting edge height the draft and upward vertical force were further reduced indicating there is benefit from having a really sharp cutting edge. The extra simulations also con- firmed that the interpolated trends for angle of underside clearance as suggested by Fielke (1994) [1] where correct with a linear reduction in draft and upward vertical force for angle of underside clearance between the ranges of -25 and -5°, and between -5 and 0°. The good correlations give confidence to recommend further investigation of the use of DEM to model the different types of tillage tools.
Details
- Title
- Defining the effect of sweep tillage tool cutting edge geometry on tillage forces using 3D discrete element modelling
- Creators
- Mustafa Ucgul - University of South AustraliaJohn M Fielke - University of South AustraliaChris Saunders - University of South Australia
- Publication Details
- Information Processing in Agriculture, Vol.2(2), pp.130-141
- Publisher
- China Agricultural University
- Grant note
- The authors acknowledge the support of the University of South Australia – Australia for granting of a post graduate scholarship to Mustafa Ucgul and the Australian Grains Research and Development Corporation (GRDC) project USA00005 for funding the computer and software.
- Identifiers
- 991013001598002368
- Copyright
- © 2015 China Agricultural University. Production and hosting by Elsevier B.V. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article