Numerical investigation of particle breakage as applied to mechanical crushing—Part I: Single-particle breakage

Kou, Shaoquan; Liu, Hongyuan; Lindqvist, Per-Arne; Tang, Chun’an; Xu, X. H.

doi:10.1016/s1365-1609(01)00075-2

Cited by 63 publications

(39 citation statements)

References 5 publications

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“…Both 2D and 3D FEM are widely used to solve 2D and 3D dimensional problems. In the field of rock mechanics, various numerical simulation codes, such as LS-DYNA [3,4,12,13,[15][16][17][18], ABAQUS [14], and rock failure process analysis (RFPA) [19][20][21][22][23][24][25][26][27][28][29], have been used for modeling. As shown in Table 1, LS-DYNA was widely used by scholars to simulate rock-tool interaction.…”

Section: Previous Numerical Simulations Of Rock Cuttingmentioning

confidence: 99%

“…RFPA, which was developed by the Northeastern University of China, is a professional rock failure analysis tool and has been widely used to analyze 2D rock failure problems in recent years. As a scientific research team, Tang and his partners have performed many studies on rock fragmentation mechanism, simulating the progress of rock cutting using RFPA (2D) [19][20][21][22][23][24][25][26][27][28][29]. DEM is a numerical method for simulating a discontinuous medium, and it is widely used in slope stability, tunnel excavation, and rock dynamic behavior simulations.…”

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confidence: 99%

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Numerical Simulation of Fragment Separation during Rock Cutting Using a 3D Dynamic Finite Element Analysis Code

Wan

Zeng

et al. 2017

Advances in Materials Science and Engineering

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To predict fragment separation during rock cutting, previous studies on rock cutting interactions using simulation approaches, experimental tests, and theoretical methods were considered in detail. This study used the numerical code LS-DYNA (3D) to numerically simulate fragment separation. In the simulations, a damage material model and erosion criteria were used for the base rock, and the conical pick was designated a rigid material. The conical pick moved at varying linear speeds to cut the fixed base rock. For a given linear speed of the conical pick, numerical studies were performed for various cutting depths and mechanical properties of rock. The numerical simulation results demonstrated that the cutting forces and sizes of the separated fragments increased significantly with increasing cutting depth, compressive strength, and elastic modulus of the base rock. A strong linear relationship was observed between the mean peak cutting forces obtained from the numerical, theoretical, and experimental studies with correlation coefficients of 0.698, 0.8111, 0.868, and 0.768. The simulation results also showed an exponential relationship between the specific energy and cutting depth and a linear relationship between the specific energy and compressive strength. Overall, LS-DYNA (3D) is effective and reliable for predicting the cutting performance of a conical pick.

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Section: Previous Numerical Simulations Of Rock Cuttingmentioning

confidence: 99%

mentioning

confidence: 99%

Numerical Simulation of Fragment Separation during Rock Cutting Using a 3D Dynamic Finite Element Analysis Code

Wan

Zeng

et al. 2017

Advances in Materials Science and Engineering

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“…It was noted that particle shape not only governs breakage strength, but also influences the macro behaviours of railway ballast (Tang et al 2001, Lim and McDowell 2005, Cho et al 2006. With the finite element method, Tang et al (2001) simulated a 2-D single particle breakage, and reported that the more spherical the particles are, the higher the breakage strength is. Hence, it is necessary to take into account the particle shape in the DEM modelling of ballast breakage.…”

Section: Introductionmentioning

confidence: 99%

Discrete element analysis of breakage of irregularly shaped railway ballast

Yan

Zhao

2014

Geomechanics and Geoengineering

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In order to reduce the maintenance costs of ballasted railway track and improve passenger comfort, the railway ballast particle breakage and its effect on track settlement need to be better understood. The failure process of individual railway ballast loaded between flat platens is simulated using the discrete element method, considering its irregular shape with the incorporation of parallel bonds. The tensile strength, the stress of a survival probability of 37% of samples, is obtained and compared with laboratory results from published literature for the verification of DEM simulations. The evolution to failure of the particle is understood from the stress-strain curve and progressive failure modes. The internal breakage mechanisms are analysed by tracking the accumulation of bond breakage number and the contact force distributions.

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“…Fragmentation is an important environmental issue as it is both an energy intensive process and a producer of significant quantities of fine waste and airborne dust. Reduction of the energy consumption used to generate fragmentation and control over the product size ranges produced can therefore bring both economic and environmental benefits [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…General dynamic fragmentation papers are presented by a range of authors [4][5][6][7][8][9][10]. Rock crushing is addressed in papers [2,[11][12][13][14][15], rock cutting in [16] and blasting in papers [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%