Determination of the draft force for different subsoiler points using discrete element method

Authors

  • Li Bo College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China
  • Xia Rui College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China
  • Liu Fanyi College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China
  • Chen Jun College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China
  • Han Wenting College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China
  • Han Bing College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, China

Keywords:

subsoiler, point shape, draft force, chisel point, DEM, conservation tillage

Abstract

Generally, a subsoiler is comprised of a shank and a point. The point shape has a significant effect on the draft force of a subsoiler. In this study, the draft force of subsoilers with four different points were compared under the speed of 0.8 m/s and the depth of 350 mm in the soil bin. Discrete Element Method (DEM) was applied in simulating the working process of the subsoiler. The stiffness of soil particles used in DEM was calibrated by comparing the simulated draft force of a standard arc-shaped subsoiler with the experiment. The calibrated soil particle stiffness was 1.1×104 N/m. The validated model was then used to compare the draft force of subsoilers with four different points under the same condition in the test. Results showed that different points would cause different draft forces. The subsoiler with short chisel point caused the smallest draft force (2885 N) while the point with short face and wings had the largest force (4474 N). The relative errors of the simulated results were less than 4%, which proved that DEM was an effective way for predicting the draft force of subsilers. The velocity field and contact force filed could show the movement of soil around the subsoiler. Keywords: subsoiler, point shape, draft force, chisel point, DEM, conservation tillage DOI: 10.3965/j.ijabe.20160903.2210 Citation: Li B, Xia R, Liu F Y, Chen J, Han W T, Han B. Determination of the draft force for different subsoiler points using discrete element method. Int J Agric & Biol Eng, 2016; 9(3): 81－87.

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Published

2016-05-31

How to Cite

(1)
Bo, L.; Rui, X.; Fanyi, L.; Jun, C.; Wenting, H.; Bing, H. Determination of the Draft Force for Different Subsoiler Points Using Discrete Element Method. Int J Agric & Biol Eng 2016, 9, 81-87.

Issue

Vol. 9 No. 3 (2016): IJABE

Section

Power and Machinery Systems

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