Discrete element method (DEM) simulation of single grouser shoe-soil interaction at varied moisture contents

Shaikh, Sher Ali; Li, Yaoming; Ma, Zheng; Chandio, Farman Ali; Tunio, Mazhar Hussain; Liang, Zhenwei

doi:10.1016/j.compag.2021.106538

Cited by 34 publications

(15 citation statements)

References 30 publications

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“…This increase might be attributed to the enhanced cohesion between pellets as moisture content rises. Additionally, the static friction coefficient of P–P interactions is greater than that of P–S because the former has a more significant surface roughness compared to the latter (Bahrami et al., 2020; Mudarisov et al., 2022; Shaikh et al., 2021). Both rolling and static friction coefficients follow a similar trend with moisture content, increasing from 0.080 to 0.132 for P–S and from 0.099 to 0.143 for P–P collisions.…”

Section: Resultsmentioning

confidence: 99%

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Ben,

Sun,

Zhu

et al. 2024

Journal of Food Science

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To quickly calibrate the discrete element parameters (DEP) of pellets with different moisture content (MC), the angle of repose (AoR) was taken as the target value to conduct experimental and simulation research on gluten pellets. The experimental method obtained the intrinsic parameters, contact parameters, and AoR of pellets with different moisture content. The parameters differed significantly under different moisture content (p < 0.05). The AoR‐MC model (R2 = 0.987) was established. The Plackett–Burman test, steepest ascent test, and center compound test were carried out to establish the AoR‐DEP model (R2 = 0.969) with a relative error less than or equal to 2.07%. The MC‐DEP model was derived, and verified by the side plate lifting method with a relative error less than or equal to 2.58%. This paper provides a new method for calibrating DEP under different moisture content.

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Section: Resultsmentioning

confidence: 99%

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Ben,

Sun,

Zhu

et al. 2024

Journal of Food Science

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“…Therefore, fertilizer particles with a similar equivalent diameter were selected to establish a spherical profile model [20]. In production practice, traditional urea fertilizer has particles sticking and caking due to deliquescence during storage and transportation [21]. In this case, screen plate filtration will be installed in the common fertilizer box on the market for pretreatment, as shown in Figure 6.…”

Section: Methodsmentioning

confidence: 99%

“…This study focuses on the production of granular fertilizers with caked fertilizers in practice and requires separate models for caking fertilizers and granular fertilizer mixes. In order to investigate the crushing characteristics of fertilizer particles, the Bonded particle method (BPM) was used to develop a discrete element model of fertilizer particles by bonding multiple small spherical filled particles of equal diameter into a lumpy fertilizer using a Bond key [21,22]. The input parameters for the BPM are obtained from the uniaxial compression test, which has been used extensively to determine the microscopic parameters of the grains.…”

Section: Model Base Parameter Determinationmentioning

confidence: 99%

Simulation Analysis and Test of Gap Squeeze Gear Type Fertilizer Discharger for Granular Fertilizer Containing Caking

Dun

Mao

et al. 2023

Preprint

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Precision fertilizer application technology is necessary to improve fertilizer utilization efficiency in agricultural production. To achieve precision fertilizer application and solve problems in production practice that contain the structure problem of the traditional mechanical fertilization systems, and the fertilizer discharger is blocked and can not achieve uniform fertilization because the fertilizer contains caking fertilizer in response to the characteristics of conventional fertilizers containing caking fertilizers, innovative design and system experimental simulation studies were carried out. A gap squeeze gear-type fertilizer dis-charger was designed, and fertilizer caking crushing was achieved by configuring the gear gap squeezing method. Combined with engineering practice, two mixed fertilizers (granular fertilizer with caking fertilizer) were constructed and blended by using BPM (Hertz Mindlin with bonding) discrete element, the fertilizer discharger was used as the object of study to simulate and experimentally investigate the process of crushing and discharging of mixed fertilizer and the process of uniform discharging of mixed fertilizer. The simulation test model of the separation device with vibration screen of the caking fertilizer and granular fertilizer after fertilizing was established to study the crushing rate of the caking fertilizer, and the simulation model with collection plate of the uniformity of the mixed fertilizer discharge was based on to explore the uniformity of the mixed fertilizer. The L9 (34) orthogonal test was carried out under the conditions with the number of teeth, pressure angle, and fertilization gap as test factors and the fertilizer crushing rate and fertilizer uniformity coefficient as test indicators. The test results showed that the number of teeth and pressure angle had significant effects (0.01 < P < 0.05) on the crushing fertilizer rate and fertilizer uniformity, and the fertilization gap had no significant impact (P༞0.05) on the crushing fertilizer rate and fertilizer uniformity. In the optimal combination of parameters, the number of teeth 6, pres-sure angle 15 °, fertilization gap 6mm operation, the coefficient of uniformity of crushing fertilizer rate and fertilizer uniformity were 74.89% and 17.21%, respectively. The bench test results compared with the outer groove wheeled fertilizer drainer showed that the optimized gap squeeze gear type fertilizer discharger has higher fertilizer crushing quality at different speeds, and the fertilizer crushing rate and uniformity were79.69% and 18.56%, respectively, within the error range. The simulation results are in general agreement. This study provides evidence for fertilizer discharger structure design and enhances the effect of fertilizer discharger crushing.

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“…The bonding had the maximum normal and tangential shear failure stress. When the tissue was compressed, the increments of the normal force, shear force, torsional torque, and bending torque of the bonding between two adjacent single‐cell particles with time followed the change in each time step of Equations (3)–(6) (Shaikh et al, 2021). When the tissue block was compressed, the relative displacement of adjacent particles would lead to the change in force on corresponding bonding.…”

Section: Methodsmentioning

confidence: 99%

Analysis of the correlation between mesocarp biomechanics and its cell turgor pressure: A combined FEM‐DEM investigation for irrigation‐caused tomato cracking

Liu

Fadiji

et al. 2022

Journal of Texture Studies

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Fruit mesocarp cracking caused by improper irrigation during development manifests at the macroscale but is ultimately the result of increasing cell turgor pressure at the microscale. Hence, a cell finite element (FE) model including shape, protoplast turgor pressure, and ripening information and a mesocarp tissue block discrete element (DE) model including the features of cell shape and number, were developed to predict the biomechanical correlation between mesocarp and its cell. The validated cell FE model with an internal turgor pressure of 12.9 kPa could reproduce the experimental force-deformation behavior of a single cell in compression up to 11% deformation with an average relative error of 5.8%. The validated mesocarp tissue block DE model could reproduce the experimental force-deformation behavior of a mesocarp block in compression up to 20% deformation with an average relative error of 9.5%. Sensitivity and regression analysis showed that turgor pressure was the most important factor affecting cell biomechanics, followed by cell shape and wall elastic modulus. Similarly, the apparent elastic modulus of the cells has the most significant effect on the mesocarp tissue biomechanics, followed by the number and shape of cells. Finally, a mathematical model was obtained to quantitatively describe the relationship between the elastic modulus of the mesocarp and its cell turgor pressure.This study contributes to a better understanding of the biomechanical mechanisms of irrigation-caused tomato fruit cracking at the cellular level and the development of strategies to prevent fruit cracking through a combination of gene breeding and irrigation management.

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Discrete element method (DEM) simulation of single grouser shoe-soil interaction at varied moisture contents

Cited by 34 publications

References 30 publications

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Measurement and calibration of gluten pellets discrete element parameters at varied moisture content

Simulation Analysis and Test of Gap Squeeze Gear Type Fertilizer Discharger for Granular Fertilizer Containing Caking

Analysis of the correlation between mesocarp biomechanics and its cell turgor pressure: A combined FEM‐DEM investigation for irrigation‐caused tomato cracking

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