Discrete element method modelling of impact breakage of ellipsoidal agglomerate

Zeng, Yong; Jia, Fuguo; Xiao, Yawen; Han, Yingpeng; Meng, Xiangyi

doi:10.1016/j.powtec.2019.01.082

Cited by 55 publications

(32 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results obtained for rice dimensions a 1 , a 2 , and a 3 , are similar, although slightly smaller than those reported in the literature by other researchers, e.g., Sadeghi et al, Zareiforoush et al, and Zeng et al [18,19,30]. Differences in dimensions may be caused primarily by the difference in the varieties and types of rice grains studied, the country of origin (the study of rice originated from Burma), grain humidity and growing conditions of grains (e.g., extensive, intensive cultivation, weather conditions that affect the grain size).…”

Section: Results Of Research On the Physical Properties Of Rice Grainsupporting

confidence: 77%

“…Differences in dimensions may be caused primarily by the difference in the varieties and types of rice grains studied, the country of origin (the study of rice originated from Burma), grain humidity and growing conditions of grains (e.g., extensive, intensive cultivation, weather conditions that affect the grain size). The presented grain size results are an indispensable element of building models in computer simulations based on the DEM discrete element method [18], e.g., in the RockyDEM environment. Figure 9 presents examples of graphs showing the characteristic of rice grain cracks during a compression test.…”

Section: Results Of Research On the Physical Properties Of Rice Grainmentioning

confidence: 99%

“…The subject of research on the physical-mechanical properties of rice grains has already been addressed by researchers, because the specificity of rice grain processing and the energy demand of processing lines, e.g., grinding, drying, pelleting, etc., depends largely on these properties [11][12][13][14][15][16][17]. In their research, Zeng, et al [18] focused on modeling cracking of rice grains depending on the grain indicators for the grinding process and modeling grinding and crushing processes using the discrete element method DEM.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical and Processing Properties of Rice Grains

et al. 2020

View full text Add to dashboard Cite

Strength properties of grains have a significant impact on the energy demand of grinding mills. This paper presents the results of tests of strength and energy needed the for destruction of rice grains. The research aim was to experimentally determine mechanical and processing properties of the rice grains. The research problem was formulated in the form of questions: (1) what force and energy are needed to induce a rupture of rice grain of the Oryza sativa L. of long-grain variety? (2) what is the relationship between grain size and strength parameters and the energy of grinding rice grain of the species Oryza sativa L. long-grain variety? In order to find the answer to the problems posed, a static compression test of rice grains was done. The results indicate that the average forces needed to crush rice grain are 174.99 kg m·s−2, and the average energy is 28.03 mJ. There was no statistically significant relationship between the grain volume calculated based on the volumetric mass density Vρ and the crushing energy, nor between the volume Vρ and other strength properties of rice grains. In the case of Vs, a low negative correlation between strength σmin and a low positive correlation between the power inducing the first crack were found for the grain size related volume. A low negative correlation between the grain thickness a3, stresses σmin and work WFmax was found as well as a low positive correlation between thickness a3 and the force inducing the first crack Fmin.

show abstract

Section: Results Of Research On the Physical Properties Of Rice Grainsupporting

confidence: 77%

Section: Results Of Research On the Physical Properties Of Rice Grainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical and Processing Properties of Rice Grains

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Introduction mentioning

confidence: 99%

“…In recent years, research has been conducted to investigate the texture test of materials [4][5][6] , such as crop stems [7] , rapeseed [8] , biscuits [9] , dough [10] , etc. The results show that the moisture content and loading mode are important factors affecting the texture properties of materials [4,9,10] . They provided a theoretical basis for model establishment as well as research methods to explore the texture mechanical properties of pellet feed [5][6][7][8] .…”

Section: Introduction mentioning

confidence: 99%

Modeling and experiments of chewing mechanical properties of pellet feed using discrete element method

Peng

Huang

Fang

2020

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

In order to explore the mechanical properties and breaking behavior of pellet feed during chewing, the experiments of texture mechanics, followed by the modeling and simulation of pellet feed based on the discrete element method were carried out in this research. Five wet basis moisture contents (8%, 10%, 12%, 14% and 16%, respectively), two kinds of loading directions (L and D direction, respectively) of pig pellet feed were selected as variables. First, mechanical parameters including hardness, elasticity, tackiness and chewiness were measured by a texture analyzer. The results of compression tests showed that the hardness of pig pellet feed was 5.44-32.43 N, the elastic index was 0.04-0.94 mm, the tackiness was 0.07-6.63 N, the chewiness was 5.52-27.39 mJ. Moreover, the hardness, tackiness and chewiness of pig pellet feed decreased significantly with the increase of moisture content but the elasticity showed an adverse varying trend. The hardness, elasticity, tackiness and chewiness along D direction outweighed that of L direction in numerical data at the same moisture content. Then, the chewing and breaking processes of pellet feed were simulated based on the discrete element method (DEM) combined with bonding particle model, in which the whole pellet feed were considered as agglomerations of micro-particles and broke when the stress between micro-particles had exceeded the maximum limit. Multi-parameter optimization experiments were carried out using quadratic orthogonal rotation design, in which stiffness coefficient (X 1), critical stress (X 2) and bonding radius (X 3) were the influencing factors, hardness (Y 1), elasticity (Y 2), tackiness (Y 3) and chewiness (Y 4) were evaluating indicators. Based on the regression analysis of the Design-Expert 8.0.6 software and response surface analysis method, the relationship between the three influencing factors and evaluating indicators was established. The similarity between experimental and simulated results in feed morphology and mechanical index proved that the modeling method for pellet feed based on DEM was effective and accurate. This work can provide a reference for the feed forming process and the optimization design of the related feed machinery. Meanwhile, the DEM model provided a new method for evaluating the texture and palatability of pellet feed.

show abstract

Modelling dynamic breakage in rock blocks with different elongation and flatness ratios upon impact

Ye,

Li,

Zeng

et al. 2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The two crucial shape factors (elongation ratio and flatness ratio) of brittle particles may influence the dynamic breakage of brittle particles upon impact. Hence, three‐dimensional discrete element method simulations of brittle rock blocks with different shapes upon normal impact were performed. The simulated results indicate that the elongation ratio, that is, ratio of width to length and flatness ratio, that is, ratio of thickness to width can significantly affect the breakage of brittle rock blocks. Three fracture mechanisms, that is, fragmentation, horizontal tensile fracture and vertical tensile fracture, were revealed, which determine the dynamic breakage of rock blocks. The fragmentation results in numerous single‐sphered fragments with velocities even larger than 2 times of the initial velocities. Fragmentation can provide a buffering effect at high impact velocities of larger than 4 m/s. With an increasing elongation ratio or flatness ratio, the phenomenon of fragmentation gradually disappears. The reflection of a compression stress wave results in horizontal tensile fracture. The expansion in the plane perpendicular to the impact velocity results in vertical tensile fracture.

show abstract

Discrete element method modelling of impact breakage of ellipsoidal agglomerate

Cited by 55 publications

References 58 publications

Mechanical and Processing Properties of Rice Grains

Mechanical and Processing Properties of Rice Grains

Modeling and experiments of chewing mechanical properties of pellet feed using discrete element method

Modelling dynamic breakage in rock blocks with different elongation and flatness ratios upon impact

Contact Info

Product

Resources

About