Algorithm for the determination of the angle of repose in bulk material analysis

Müller, Dominik; Fimbinger, Eric; Brand, Clemens

doi:10.1016/j.powtec.2021.01.010

Cited by 42 publications

(15 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding the selection of the contour line fitting equation, although some investigators [ 43 ] describe the contour of the particle pile by a triangle, the contours observed in the experiments [ 29 ] are more irregular. The literature [ 37 ] proposes that it is more appropriate to describe the contour of this type of particle piles with Gaussian fitting, because it approximates over all data points and shows less errors. The CORF and COSF showing the best fit are reported in Table 5 , and a comparison of their bell curves with the experiments is given in Figure 9 .…”

Section: Resultsmentioning

confidence: 99%

“…This method is simple to operate, but human subjectivity may affect the accuracy of the results. Therefore, current measurement methods apply algorithms developed based on image analysis and coordinate measurement technology [ 36 , 37 ]. Many investigators [ 38 , 39 ] have determined the mechanical properties of materials by processing images.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Analysis of the Relationship between Friction Coefficient and Repose Angle of Blast Furnace Raw Materials by Discrete Element Method

et al. 2022

View full text Add to dashboard Cite

In recent years, the discrete element method (DEM) has been widely used to study the factors affecting the repose angle and calibrate particle parameters for simulations. In this paper, DEM is used to study the effects of the coefficient of rolling and static friction of pellet, sinter and coke particles on the repose angle. By comparison of the results of simulations and physical experiments, the coefficients of rolling and static friction suitable for simulation work are determined. The results demonstrate that repose angle increases with the coefficient of rolling and static friction, but the rate of increase gradually decays, when the coefficient of rolling friction exceeds 0.4 or the coefficient of static friction exceeds 0.35. The coefficient of static friction has a greater impact on the repose angle than the coefficient of rolling friction. The rougher of the base surface, the larger the repose angle of the formed particle piled. It can be concluded that appropriate coefficient of rolling and static friction for simulations can be obtained by the outlined procedure.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Numerical Analysis of the Relationship between Friction Coefficient and Repose Angle of Blast Furnace Raw Materials by Discrete Element Method

et al. 2022

View full text Add to dashboard Cite

show abstract

“…During the calibration of particle parameters, angle of repose is an important parameter to test the accuracy of DEM particle model. The measuring method of repose angle mainly includes hollow cylinder method and fixed funnel method 36,37 . Since the hollow cylinder method can more accurately simulate the collapse process of the accumulated particles, this article selected the hollow cylinder method to verify the accuracy of the constructed gravel particles.…”

Section: Methodsmentioning

confidence: 99%

Drilling study of bit in gravel environment based on DEM–MBD

Gao

Liu

et al. 2021

Engineering Reports

View full text Add to dashboard Cite

In the process of rock bolt support for the roadway with floor heave, the rock bolt cannot reach the bottom of the borehole smoothly due to the influence of the collapse gravels around the borehole. In order to solve the problem of difficult rock bolt installation, the auxiliary installation device of rock bolt drilling was innovatively designed. At the same time, a new method of auxiliary bolt installation was put forward, in which a bit was installed at the bottom of the bolt to assist the bolt drilling. The drilling process of the bit was simulated by the co-simulation of discrete element method (DEM) and multibody dynamics method (MBD). The axial resistance of the bit and the change law of the particles movement were studied under different motion parameters and structural parameters. It was found that the drilling performance of bit was directly related to the motion parameters and structure of bit. And the selection of gravel parameters in DEM was verified by experiments. The research results can provide technical guidance for bit structure design and the selection of motion parameters of bolt drilling auxiliary installation device, and can effectively improve the rock bolt installation efficiency.

show abstract

“…When the soil particle slope was stable, we used a camera to take vertical photos of the front and side of the conical mound [19]. To reduce the error of manual measurement, firstly, the stacking angle graph (Figure 4a) obtained from the test was processed by grayscale processing (Figure 4b) and binarization processing (Figure 4c) using MATLAB; afterward, we transformed the edge contour curve (Figure 4d) into coordinate data through Origin software for linear fitting; and finally, the soil stacking angle was determined according to the slope of the fitting line (Figure 4e) [20]. Through 10 calculations, the average value of soil stacking angle was 27.69°.…”

Section: Soil Stacking Testmentioning

confidence: 99%

Calibration and Verification Test of Cinnamon Soil Simulation Parameters Based on Discrete Element Method

et al. 2022

View full text Add to dashboard Cite

To obtain the discrete element simulation model parameters suitable for the interaction between cinnamon soil and soil-engaging components, the Hertz–Mindlin with JKR contact model in EDEM simulation software was used to calibrate the relevant model parameters of cinnamon soil. Firstly, the particle size distribution, moisture content, volume density, Poisson’ s ratio, shear modulus, and other parameters of the cinnamon soil were measured with cinnamon soil as the research object. Further, taking the stacking angle as the response value, the Plackett–Burman test, the steepest climbing test, and the Box–Behnken were designed by using the Design-Expert software to calibrate and optimize the physical parameters of soil simulation. The optimal parameter combination was obtained: cinnamon soil–cinnamon soil rolling friction coefficient was 0.08, soil JKR surface energy was 0.37 J/m−2, and cinnamon soil–steel static friction coefficient was 0.64. Finally, the discrete element simulation verification test of stacking angle and cutting resistance was carried out under the calibrated parameters. The comparative calculation showed that the relative error between the simulated stacking angle and the measured stacking angle was 0.253%, and the maximum relative error between the simulated cutting resistance and the measured cutting resistance was 10.32%, which was within the acceptable range, indicating the high accuracy and reliability for the calibration parameters. The research results have important reference value for the energy-saving and consumption-reducing design of soil tillage components and provide basic data for the simulation of cutting resistance research of cinnamon-soil-engaging components.

show abstract

Algorithm for the determination of the angle of repose in bulk material analysis

Cited by 42 publications

References 4 publications

Numerical Analysis of the Relationship between Friction Coefficient and Repose Angle of Blast Furnace Raw Materials by Discrete Element Method

Numerical Analysis of the Relationship between Friction Coefficient and Repose Angle of Blast Furnace Raw Materials by Discrete Element Method

Drilling study of bit in gravel environment based on DEM–MBD

Calibration and Verification Test of Cinnamon Soil Simulation Parameters Based on Discrete Element Method

Contact Info

Product

Resources

About