Evaluation of Effective Factors on the Breakage of Granular Materials Using Discrete Element Method (DEM)

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AMINZADEH A.; FAHIMIFAR A.

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Journal: JOURNAL OF ROCK MECHANICS Year:2017 | Volume:1 | Issue:1 Page(s): 1-10

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Title

Evaluation of Effective Factors on the Breakage of Granular Materials Using Discrete Element Method (DEM)

Author(s)

AMINZADEH A. | FAHIMIFAR A. | Issue Writer Certificate

Keywords

Particle Breakage

Granular Materials

Discrete Element Method

Particle Shape

Confining Pressure

Abstract

Summary In this paper, the influence of three different parameters (Confining Pressure, particles shape and mode of failure) on Particle Breakage in granular media is studied by Discrete Element Method. The percentage of Particle Breakage under four Confining Pressure levels is presented for three Particle Shapes and two modes of failure. At last, the results are compared with the past numerical and experimental outcomes and the weak and strength points are evaluated. Introduction According to the results of experimental tests, various parameters are effective on the behavior of Granular Materials. In this paper, the effect of Confining Pressure, grain shape and modes of failure on propagation of Particle Breakage in Granular Materials has been investigated. To achieve this, numerical simulations of biaxial tests are implemented by DEM. The numerical methods are not only cheaper and faster, but also more focused on one or several specific parameters. Methodology and Approaches To model the biaxial tests, the modified DEM code POLY (which is a Fortran code) was utilized. For each of the three mentioned parameters, the results of numerical simulations are represented in terms of curves of Particle Breakage percentage against Confining Pressure. The numerical tests are performed for three different Particle Shapes (triangular, square and hexagonal particles) which can be broken in two modes (fragmentation into two halves or erosion of the angular points). Results and Conclusions The outcomes show that an increase in both angularity and Confining Pressure parameters leads to an increase in Particle Breakage of the samples. Also, the mode of failure has a considerable effect on the percentage of particles breakage. Finally, the results of the numerical modeling with the discrete element code utilized in this study are compared with the past numerical and experimental outcomes in one figure; a comparison between the results shows their acceptable agreement. There are also some differences between the outcomes which may be originated from quite a few reasons, two of which are as follows: 1. The numerical simulations, unlike the real tests, are two dimensional and 2. The methodology of defining breakage is different for numerical and experimental tests. In overall, utilizing the present code for the future studies will be logical.

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APA: Copy

AMINZADEH, A., & FAHIMIFAR, A.. (2017). Evaluation of Effective Factors on the Breakage of Granular Materials Using Discrete Element Method (DEM). JOURNAL OF ROCK MECHANICS, 1(1 ), 1-10. SID. https://sid.ir/paper/268305/en

Vancouver: Copy

AMINZADEH A., FAHIMIFAR A.. Evaluation of Effective Factors on the Breakage of Granular Materials Using Discrete Element Method (DEM). JOURNAL OF ROCK MECHANICS[Internet]. 2017;1(1 ):1-10. Available from: https://sid.ir/paper/268305/en

IEEE: Copy

A. AMINZADEH, and A. FAHIMIFAR, “Evaluation of Effective Factors on the Breakage of Granular Materials Using Discrete Element Method (DEM),” JOURNAL OF ROCK MECHANICS, vol. 1, no. 1 , pp. 1–10, 2017, [Online]. Available: https://sid.ir/paper/268305/en

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