Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

Horabik, J.; Wiącek, Joanna; Parafiniuk, Piotr; Stasiak, Mateusz; Bańda, Maciej; Kobyłka, R.; Molenda, M.

doi:10.3390/ma13040932

Cited by 18 publications

(5 citation statements)

References 56 publications

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“…The high value of the coordination number applied in simulations (10.5-12.9) considerably increased the strength of pellets generated by elastic bonds and friction in particle contacts and promoted the rounded shape of the σ 1 (∆L/D) relationship typical for the ductile breakage mode. As shown by Horabik et al [54], σ c /E b was <0.1 for the semi-brittle breakage mode and >0.15 for ductile breakage. The σ c /E b values found in this study ranged from 0.25 to 0.5, which is typical for the ductile breakage mode.…”

Section: Simulation Resultsmentioning

confidence: 73%

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

Horabik¹,

Bańda²,

Józefaciuk³

et al. 2021

Materials

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Wood pellets are an important source of renewable energy. Their mechanical strength is a crucial property. In this study, the tensile strength of pellets made from oak, pine, and birch sawdust with moisture contents of 8% and 20% compacted at 60 and 120 MPa was determined in a diametral compression test. The highest tensile strength was noted for oak and the lowest for birch pellets. For all materials, the tensile strength was the highest for a moisture content of 8% and 120 MPa. All pellets exhibited a ductile breakage mode characterised by a smooth and round stress–deformation relationship without any sudden drops. Discrete element method (DEM) simulations were performed to check for the possibility of numerical reproduction of pelletisation of the sawdust and then of the pellet deformation in the diametral compression test. The pellet breakage process was successfully simulated using the DEM implemented with the bonded particle model. The simulations reproduced the results of laboratory testing well and provided deeper insight into particle–particle bonding mechanisms. Cracks were initiated close to the centre of the pellet and, as the deformation progressed, they further developed in the direction of loading.

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Section: Simulation Resultsmentioning

confidence: 73%

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

Horabik¹,

Bańda²,

Józefaciuk³

et al. 2021

Materials

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“…The discrete element analysis has found wide‐ranging applications in the field of agricultural engineering, allowing for the simulation and analysis of the dynamic interactions between agricultural machinery and crops during the harvesting process (Dang et al, 2022; Horabik et al, 2019; Horabik et al, 2020; Xie et al, 2019). EDEM is a discrete element analysis software with high‐performance for the simulation of bulk and granular materials.…”

Section: Introductionmentioning

confidence: 99%

Simulation analysis and experimental testing of the grading performance of small potato grading device

Deng,

Ren,

Zhao

et al. 2024

J Food Process Engineering

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Existing potato grading device has a complex structure and a large volume, which is not suitable for small‐scale potato farmers. However, traditional manual grading methods not only have low efficiency but also high labor costs. This article developed a small movable rotating plate (MRP)‐type potato grading device, and the influences of three factors (the height of the horizontal slide, the tilt angle of the inclined slide, and the chain speed) on the grading efficiency and accuracy were investigated using the discrete element method and virtual orthogonal experiments. It was found that the horizontal slide height of 185 mm, the inclined slide tilt angle of 3.5°, and the chain speed of 0.9 m/s yielded the optimal grading efficiency (13.84 t/h) and grading accuracy (94.11%). Finally, the potato grading process was tested and validated through indoor tests, and the optimal grading accuracy was 91.04%. The grading accuracy deviation between the test and simulation results was less than 8%.Practical ApplicationCurrently, most commercial potato grading machines are designed for large‐scale farms, which are not suitable for developing countries. The potato grading device designed in this article can not only be used independently by small‐scale farms, but also be integrated with potato combine harvesters to achieve potato harvest and grading joint operations. This grading device has a simple structure, small footprint (1700 × 1200 × 840 mm3), and a very low cost ($600). With a high grading efficiency and accuracy, it can significantly improve the grading productivity of small and medium‐sized potato farmers in developing countries, reduce the production costs, and save labors.

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“…Geng et al, 2021 calibrated the contact parameters of Oat without shell and Oat with shell by using discrete element method and graphic image processing techniques. In addition, parameters of wheat (Liu et al, 2016;Horabik et al, 2020;Sun et al, 2022), rice (Han et al, 2017;Zhang S. et al, 2020), soil (Zhou et al, 2014;Song et al, 2022), water chestnut (Zhang G. et al, 2022), oats and Vicia sativa mixed seed (Liao et al, 2022) were also calibrated.…”

Section: Introductionmentioning

confidence: 99%

Calibration and experiment of discrete element model parameters of Zanthoxylum bungeanum

Wang

Chen

et al. 2023

Front. Mech. Eng.

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Zanthoxylum bungeanum is a characteristic spice in culinary culture. This article focuses on the lack of intrinsic and contact parameters for Zanthoxylum bungeanum and studies the intrinsic parameters of the discrete element for tribute pepper from Hanyuan. This is to provide support for the mechanized harvesting of Zanthoxylum bungeanum. The EDEM software was used to establish a discrete element model for Zanthoxylum bungeanum granules. The intrinsic parameters of Zanthoxylum bungeanum granules, such as Three-dimensional dimension, density, Poisson’s ratio, and elastic modulus, were measured through experiments. The elastic recovery coefficient, static friction coefficient, and rolling friction coefficient between Zanthoxylum bungeanum granules and Dragon Skin 30 silicone sheets were also measured. Subsequently, the elastic recovery coefficient, static friction coefficient, and rolling friction coefficient between Zanthoxylum bungeanum granules and materials, as well as between Zanthoxylum bungeanum granules were obtained through discrete element simulation experiments, steepest climb test, and Quadratic regression orthogonal rotation combination test. Finally, the Angle of repose was used for verification experiments. The results showed that the elastic recovery coefficient, static friction coefficient, and rolling friction coefficient between Zanthoxylum bungeanum granules and materials were 0.437, 0.758, and 0.0136, respectively, while those between Zanthoxylum bungeanum granules were 0.378, 0.56, and 0.0143, respectively. The error between the simulation angle of repose and the measured angle of repose was 0.204%, verifying the reliability of the discrete element model for Zanthoxylum bungeanum granules. This method is of great significance for the design and optimization of Zanthoxylum bungeanum harvesters.

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Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

Cited by 18 publications

References 56 publications

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling

Simulation analysis and experimental testing of the grading performance of small potato grading device

Calibration and experiment of discrete element model parameters of Zanthoxylum bungeanum

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