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Research Article Fractal and Morphological …

2019-7-31 · determining the physical characteristics of single particle crushing. Russell et al. [ ] analysed breakage behaviour of characteristic elastic-plastic granules using compression tests.estudydescribesthein uencesofgranulesize,mois-ture content, and loading intensity on the energy absorption andrecoveryatstressing.Mader-Arndtetal.[ ]investigated

The Consequence of Particle Crushing in Engineering ...

This paper presents experimental investigation for particles breakage for natural sand. The particle breakage was induced by subjecting the sample to one dimensional compression. Grain size analyses were performed before and after induced breakage. Thereafter, the sand shear strength parameters were assessed using direct shear box tests and the coefficient of permeability was assessed using ...

Visualization of Crushing Evolution in Granular Materials ...

As a result of these loads, particle crushing may occur. The present study demonstrates that the discrete-element method (DEM) can be used to visualize the evolution of this breakage process. In particular, the evolution of crushing in a simulated granular material subjected to uniaxial compression is presented.

Testing and Modeling on Particle Breakage for Granular ...

Wu et al. introduced the compression and particle breakage characteristics of silica sand through a series of high stress–level monotonic and cyclic loadings with different stress paths (i.e., isotropic compression, anisotropic compression, and constant-mean effective stress shearing). It was found that the degree of particle breakage was ...

The Bearing and Breakage Characteristics of Crushed …

1980-11-1 · These characteristics are expressed by the major comminution functions: crushing probability function, energy function and breakage function. The crushing probability function is the strength distribution of particles of a given size. The energy function is the strength of the particles as a function of their sizes.

Breakage Characteristics of Heat-Treated Limestone ...

2018-1-12 · The breakage characteristics of heat-treated limestone were determined using a laboratory ball mill. Mathematical modeling based on the mass balance equation and simulation of the grinding process using two functions—corresponding to the specific rate of breakage and primary breakage distribution—were performed.

Breakage of an artificial crushable material under loading ...

2013-7-6 · The mechanical behaviour of granular materials depends on their grading. Crushing of particles under compression or shear modifies the grain size distribution, with a tendency for the percentage of fine material to increase. It follows that the frictional properties of the material and the critical states are modified as a consequence of the changes in grain size distribution and the available ...

Interplays between particle shape and particle breakage …

2020-10-26 · evolution and its interplay with the crushing characteristics during continuous crushing of granular sand. We employ a recent hybrid peridynamics (PD) and non-smooth contact dynamics (NSCD) ap-proach developed by the authors [18]forthestudy.Aswillbe shown, the approach enables the simulation of continuous particle crushing process while ...

2021-8-25 · Particle crushing simulations with improved discontinuous deformation analysis [J]. Engineering Computations, 2014, 31(7): 1321 - 1341. (SCI) [40] Xiao-Bo WANG, Wen-Jie XU*, Bing-Yin ZHANG Breakage Characteristics and Crushing Mechanism of Cement

Cone Crusher Performance

These factors are: breakage modes, number of crushing zones, and compression ratio. The main factors are affected by both design and operating parameters. For a given crusher, the factors depend on eccentric speed, closed side setting, rock material breakage characteristics and feed size distribution.

Experimental investigation on mechanical behavior and ...

2021-1-1 · The modified relative breakage B r = B t / B p is expressed as the ratio of the total breakage B r divided by the breakage potential B p (Hardin, 1985). The dark grey zone represents the total breakage B t and the area with strip grid stands for breakage potential B p. D m and D M represent the maximum and minimum grain diameter in Fig. 15.

Breakage law and fractal characteristics of broken coal ...

breakage, and compression-induced deformation of particles. With increasing stress, the crushing amount of particles gradually grew while the increase rate of the crushed particles gradually decreased and the larger the particle strength was, the lower the in-crease rate of the crushing amount. Additionally, in the compaction process of samples,

Effects of particle size on crushing and deformation ...

2020-3-1 · Abstract. Strength and deformation behaviors of rockfill materials, key factors for determining the stability of dams, pertain strongly to the grain crushing characteristics. In this study, single-particle crushing tests were carried out on rockfill materials with nominal particle diameters of 2.5 mm, 5 mm and 10 mm to investigate the particle ...

Engineering properties of the compressibility and crushing ...

The microscopic characteristics of silicate and carbonate sands were identified. • The compression behaviors of transitional silicate-carbonate soils were examined. • Soil deformation is divided into inter-particle rearrangement and particle breakage. • Particle breakage of transitional soils were analyzed through gradation evolution. •

Compaction and Breakage Characteristics of Crushed …

2020-12-24 · The subsidence of urban pavement is becoming frequent accidents, and backfill is the primary means of remedy. Crushed stone is a commonly used aggregate for backfill material in engineering, and its compaction behavior under load needs to be well understood. In this work, a series of compaction tests were carried out on the same batch of crushed stone samples with the same …

The Swebrec function: linking fragmentation by blasting ...

2016-9-29 · blasting, KuzÐRam model, CZM, TCM, crushing, breakage function, NBC, natural breakage characteristics, t 10 BLAST FRAGMENTATION In an area as complicated as rock fragmentation by blasting, CunninghamÕs KuzÐRam model 4,5,13 has for 20 years done an invaluable job in fostering a structured approach to what can be done to change the ...

Undrained cyclic shear characteristics and crushing ...

This paper presents an investigation of the liquefaction characteristics and particle crushing of isotropically consolidated silica sand specimens at a wide range of confining pressures varying from 0.1 MPa to 5 MPa during undrained cyclic shearing. Different failure patterns of silica sand specimens subjected to undrained cyclic loading were seen at low and high pressures.

Effects of size and shape on the crushing strength of ...

2020-10-22 · When it comes to the effect of shape on coral sand particles'' breakage, however, there have been few studies. This paper employs a single-particle compression test, MATLAB Image Processing Toolbox, and Weibull distribution analysis to study the characteristics of the crushing strength of coral sand particles.

Energies | Free Full-Text | Breakage Characterization of ...

A series of impact compression tests were conducted to study the breakage characteristics of magnetite, as well as the impact pressure on its strain rate and dynamic compressive strength. The dynamic mechanical properties and fragmentation size distribution of magnetite under diverse impact loads and cyclic impact were investigated, with fractal theory as a basis and split Hopkinson pressure ...

Breakage Characteristics and Crushing Mechanism of …

Breakage Characteristics and Crushing Mechanism of Cement Materials Using Point-Loading Tests and the Discrete-Element Method. A point-loading device was used to research the breakage characteristics of single particles and to study their crushing mechanism. A series of point-loading tests were completed on the basis of cement ellipsoid ...