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Simulation of Mouldboard Plough Soil Cutting Based on Smooth Particle Hydrodynamics Method and FEM–SPH Coupling Method

Author

Listed:
  • Xiaoming Jin

    (Department of Mechanical Engineering, Xinjiang University, Urumqi 830017, China)

  • Fangping Ma

    (Department of Mechanical Engineering, Xinjiang University, Urumqi 830017, China)

  • Di Wang

    (Department of Mechanical Engineering, Xinjiang University, Urumqi 830017, China)

  • Zhengtao Zhu

    (Department of Mechanical Engineering, Xinjiang University, Urumqi 830017, China)

Abstract

In the field of agricultural machinery, various empirical field tests are performed to measure the tillage force for precision tillage. However, the field test performance is costly and time-consuming, and there are many constraints on weather and field soil conditions; the utilization of simulation studies is required to overcome these shortcomings. As a result, the SPH method and the coupled FEM-SPH method are used in this paper to investigate the mouldboard plough–soil interaction. In this paper, the finite element software LS-DYNA was used to build the SPH model and the FEM-SPH coupling model of soil cutting, as well as to investigate the change in cutting resistance during the soil cutting process. The simulation results are compared with those of the experiments, and the curves of the simulation and experiment are in good agreement, which verifies the reliability of the model. The validated simulation model was used to investigate the effects of the cutting speed, depth of cut, inclination angle, and lifting angle of the mouldboard plough on cutting resistance. The simulation studies show that the SPH model takes 5 h and 2 min to compute, while the FEM-SPH coupled model takes 38 min; obviously, the computational efficiency of the FEM-SPH coupled model is higher. The relative errors between the SPH model and the experiment are 2.17% and 3.65%, respectively. The relative errors between the FEM-SPH coupled model and the experiment are 5.96% and 10.67%, respectively. Obviously, the SPH model has a higher computational accuracy. The average cutting resistances predicted by the SPH model and the FEM-SPH coupled model, respectively, were 349.48 N and 306.25 N; these resistances are useful for precision tillage. The cutting resistance increases with the increase in cutting speed and is quadratic; the cutting resistance increases with the increase in cutting depth and is quadratic; the horizontal cutting resistance and the combined cutting resistance increase with the increase in inclination angle, while the vertical cutting resistance remains essentially constant with the increase in inclination angle; the horizontal cutting resistance and combined cutting resistance increase as the lifting angle increases, while the vertical cutting resistance decreases as the lifting angle increases.

Suggested Citation

  • Xiaoming Jin & Fangping Ma & Di Wang & Zhengtao Zhu, 2023. "Simulation of Mouldboard Plough Soil Cutting Based on Smooth Particle Hydrodynamics Method and FEM–SPH Coupling Method," Agriculture, MDPI, vol. 13(9), pages 1-18, September.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:9:p:1847-:d:1244499
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    References listed on IDEAS

    as
    1. Renton, Michael & Flower, Ken C., 2015. "Occasional mouldboard ploughing slows evolution of resistance and reduces long-term weed populations in no-till systems," Agricultural Systems, Elsevier, vol. 139(C), pages 66-75.
    2. Kojo Atta Aikins & Mustafa Ucgul & James B. Barr & Emmanuel Awuah & Diogenes L. Antille & Troy A. Jensen & Jacky M. A. Desbiolles, 2023. "Review of Discrete Element Method Simulations of Soil Tillage and Furrow Opening," Agriculture, MDPI, vol. 13(3), pages 1-29, February.
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