The critical state of crushable granular sand | Acta …
The concept of critical state has been a cornerstone of modern critical state soil mechanics. It remains inconclusive how grain crushing affects critical state behavior in crushable granular sand. A multiscale computational approach is employed in this study to simulate the shearing behavior of crushable granular sand at critical state. Grain crushing is rigorously …
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Microscopic Particle Crushing of Sand Subjected to High …
Key words compression grain size distribution (microscopic observation) particle crushing sand yield (IGC: D5) REFERENCES 1) J. Billam, Some aspects of the behaviour of granular materials at high pressures Proc. of the Roscoe Memorial Symp., Cambridge (1972) 69-80 Billam, J. (1972): Some aspects of the behaviour of granular materials at high ...
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DEM analysis of crushing around driven piles in granular materials
DEM analysis of crushing around driven piles in granular materials Open PDF. Géotechnique. ISSN 0016-8505 ... DEM analysis of crushing around driven piles in granular materials Authors: S. Lobo-Guerrero * x. S. Lobo-Guerrero. Search for articles by this author, and L. E. Vallejo * x. L. E. Vallejo. Search for articles by this author
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Evaluation of the crushing characteristics of industrial waste
It is evident from the above-mentioned results and discussions that the relative breakage or crushing of materials cannot be attributed to just one single parameter or the applied stress alone. When a granular mass is compressed, the grains resist the crushing by forming a sequence of connections (force chains) with one another.
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Shear strength of angular granular materials with size and …
Shear strength of angular granular materials with size and shape polydispersity Carrasco, Sergio 1, 2 ; Cantor ... P-Y.; Maiolino, S.; Hu, W. Size effects due to grain crushing in rockfills shear strength, be published in 18th International Conference for Soil Mechanics and Geotechnical Engineering (2013)
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The fractal crushing of granular materials
The crushing of particles in a granular material must be related to changes in the 2079 2080 G. R. MCDOWELL et a!. particle size distribution (Hardin, 1985). There are two approaches for predicting particle size distributions: constrained and unconstrained …
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The fractal crushing of granular materials
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…
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Assessing particle crushing mechanism and optimizing …
This approach enables the simulation of particle crushing in granular materials under arbitrary three-dimensional stress conditions. The algorithm has promising prospects for a wide range of engineering applications. Moreover, it holds great theoretical significance in advancing the development of particle-crushing algorithms and theories.
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Compressibility And Crushing Of Granular Soil In …
Analyzing the Crushing of Granular Materials by Sound Analysis Technique. Go to Citation Crossref Google Scholar. 293. Utilization of fly ash as engineering pellet aggregates. Go to Citation Crossref Google Scholar. 294. Monitoring the Hydraulic Conductivity of …
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Numerical model of crushing of grains inside two …
The model is implemented in a two-dimensional computer simulation code based on the molecular dynamics method to study the crushing mechanisms of grains inside a …
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Mechanical behavior and particle crushing of irregular …
Granular materials with irregular sides were modelled using the discrete element method. A new method of using a shear fracture zone to characterize the deformation of …
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Creep of granular materials | Granular Matter
This paper examines the creep of brittle granular materials subjected to one-dimensional compression. One-dimensional creep tests were performed on aggregates of brittle pasta and compared with the behaviour of sand at much higher stress levels. It was found that for both materials, creep strain is proportional to the logarithm of time. One possible mechanism for …
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Modeling the single particle crushing behavior by random …
For this purpose, extensive investigations on the crushing behavior of granular materials have been carried out using various experimental approaches, including single-particle crushing tests [10], [15], triaxial shear tests [16], [17], and creep tests [18], [19].Although the particle crushing characteristics and their correlation with the mechanical behavior can be …
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Evolution of fragment size distributions from the crushing of …
We study fragment size distributions after crushing single and many particles under uniaxial compression inside a cylindrical container by means of numerical simulations. …
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Mechanical behavior and particle crushing of irregular granular …
This result is consistent with the concept of crushing potential proposed by Einav 61, i.e., when the confining pressure reaches a certain extreme value, irregular granular materials will reach a ...
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Analyzing the Crushing of Granular Materials by Sound …
Signal processing techniques have been introduced in the past two decades into engineering applications to analyze particle-scale microstructure. In this paper, a different approach of signal processing techniques for the geotechnical engineering application is introduced. The crushing of granular particles was analyzed by using the sound analysis …
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The relevance of roundness to the crushing strength of granular materials
The relevance of roundness to the crushing strength of granular materials. ... The new criterion is suitable for implementation in particle-scale crushing simulations of granular masses, using, for example, the discrete-element method, as well as in improved probabilistic frameworks. Previous article in issue; Next article in issue;
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Effect of Sample Size on the Behavior of Granular Materials
The results show a nonstandard evolution of the friction angle in relationship to grain size if compared to similar studies on coarse granular materials. Although grain crushing occurs during compression, the strain-stress curves of the different materials with different grain sizes do remain close.
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Compression of granular materials
Compression data on over 100 sands were examined to clarify the role of particle rearrangement through interparticle slip and rotation and particle damage on primary compression, including the yield stress, secondary compression, and coefficient of lateral pressure at rest. During the increase in effective vertical stress, mechanisms such as tighter …
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Visualization of Crushing Evolution in Granular Materials …
Granular materials forming part of natural slopes, embankments, subgrades of foundations, and pavement structures are subjected to both static and dynamic loads during their engineering lives. ... In this way, by using a simplified failure criterion, DEM can be used to visualize and understand the evolution of granular crushing. This is ...
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Time Effects Relate to Particle Crushing in Granular Materials …
Sands exhibit patterns of time effects different from those observed in clays. It appears that time effects in sand are associated with crushing of particles, and a mechanistic picture of time effects in granular materials is constructed in which time effects depend on particle crushing by static fatigue, interparticle friction, and grain rearrangement.
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Modeling the single particle crushing behavior by random …
Microscopic properties of granular materials typically exhibit significant heterogeneity. Realistic particle crushing simulation in granular materials requires the use of model that incorporate the spatial heterogeneity of its microscopic properties. This study introduces a novel approach, the Random Field Theory-Discrete Element Method (RFT-DEM) …
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Analyzing the Crushing of Granular Materials by Sound …
The aim of this study is to investigate the effect of crushing on the bulk behavior of granular materials by using manufactured granular materials (MGM) rather than using a naturally occurring ...
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Evolution of fragment size distributions from the crushing of granular
We study fragment size distributions after crushing single and many particles under uniaxial compression inside a cylindrical container by means of numerical simulations. Under the assumption that breaking goes through the bulk of the particle we obtain the size distributions of fragments for both cases after large displacements. For the single-particle …
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Fractal crushing of solid particles | KSCE Journal of Civil
It does not have widely accepted theory to study particle crushing up to now because of the complex and irregular physical structure of the particles. Fractal theory, which employs statistical concepts in order to explain particle crushing, may provide a solution to this problem. The particle size distributions are introduced to determine the fractal dimension. The …
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Shear strength of granular materials based on fractal …
Particle crushing of granular materials in direct shear tests leads to a power-law distribution of fragment sizes, and is accurately characterized by the fragmentation fractal dimension drawn from the power exponent. Based on the fractal model for particle fragmentation, a power function is advocated to represent the shear strength criterion of ...
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Interplays between particle shape and particle breakage in …
Grain crushing is also of great interest to geophysical research since it is a key mechanism in geoscience with relevance to cataclastic flow, localized deformation in porous rocks, and accretionary wedges. The process of grain crushing in granular media is featured by accompanied evolutions of both grain size and shape.
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Analyzing the Crushing of Granular Materials by Sound …
Abstract. Signal processing techniques have been introduced in the past two decades into engineering applications to analyze particle-scale microstructure. In this paper, a different approach of signal processing techniques for the geotechnical engineering application is introduced. The crushing of granular particles was analyzed by using the sound analysis …
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Evolution of fragment size distributions from the crushing of granular
Download a PDF of the paper titled Evolution of fragment size distributions from the crushing of granular materials, by Pavel S. Iliev and Falk K. Wittel and Hans J. Herrmann Download PDF Abstract: We study the fragment size distributions after crushing of single and many particles under uniaxial compression inside a cylindrical container by ...
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Breakage and deformation mechanisms of crushable granular materials
Granular materials are composed of distinct particles interacting with each other and associated voids. Upon loading, the particles may slide, rotate and crush or break. The deformation and breakage mechanism of granular materials is complicated and many experimental and theoretical studies have been carried out on these materials.
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