The fractal crushing of granular materials
This study investigated the influence of stress levels on the mechanical behavior and particle crushing of irregular granular materials. Granular materials with irregular sides …
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Dynamic crushing of cellular materials: A unified framework …
The main conclusions are: (1) the strain-rate sensitivity of cellular materials is closely associated with base material properties (both quasi-static and dynamic ones) and cell structure; (2) the compaction shock in cellular materials has mesoscopic structural causes and its formation leads to unique deformation mode, load transmission and ...
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CRUSHING PHENOMENA IN GRANULAR SOILS
Semantic Scholar extracted view of "CRUSHING PHENOMENA IN GRANULAR SOILS" by T. Ramamurthy. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 216,508,622 papers from all fields of science. Search. Sign In Create Free Account.
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Experimental investigation of the particle breakage of coarse …
Particle breakage is a phenomenon that occurs when particles of coarse-grained materials (CGMs) are exposed to considerable stress or shear strain, followed by breakage into smaller-sized particles. ... Fractal crushing of granular materials under confined compression at different strain rates. Int J Impact Eng, 106 (2017), pp. 259-265, 10.1016 ...
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Dynamic crushing of cellular materials: a particle velocity …
Cellular material under high-velocity impact exhibits a typical feature of layerwise collapse. A cell-based finite element model is employed herein to simulate the direct impact of a closed-cell , and one-dimensional velocity field distributions are obtained to characterize the crushing band propagating through a cellular material. An explicit expression for the …
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Single particle crushing of nonmetallic inorganic brittle materials
The crushing phenomenon of a solid material is essentially dependent on the structure-sensitive defects such as microcracks. It is also accompanied essentially by nonlinear, irreversible and irrecoverable process. Furthermore, this is the initiation of microcracks, growth and propagation of fracture cracks, which are strongly influenced by ...
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Tricking the fractal nature of granular materials subjected to …
Fractal nature of the material can be tricked to control the PSD after crushing. Size of crushed particles is affected by the presence of uncrushable particles. Findings are supported …
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Understanding Buckling
For very low slenderness ratios the strength of the material will be exceeded before the buckling limit is reached. This means we can define two distinct regions, one where columns fail by crushing because the stress in the column exceeds the material yield strength (i.e. for stocky columns), and one where they fail due to buckling (i.e. for ...
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Experimental Study of the Crushing Characteristics of
In this paper, the gas–solid coupling method is used to explore the regional distribution of collision energy, collision frequency, and collision energy spectrum of the …
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Experimental Study of the Crushing Characteristics of Single …
In this work, an experimental setup for active impact crushing is designed and constructed to investigate the crushing behavior of particles in a VSI crusher.
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A simple gradation-state-dependent model for granular materials
Granular crushing is a common phenomenon in a series of engineering problems involving high-stress levels, such as high rockfill dams, pile foundation penetration into soils, and the comminution of particles in roller mills (Zhang et al., 2016, Zhang et al., 2013, Guo and Chen, 2022, Zhou et al., 2019).Therefore, gradation evolution induced by crushing is a crucial issue …
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Water retention properties of perlite as a material with …
The crushing phenomenon can also be accelerated by the humidity evolution inside the material (Oldecop and Alonso, 2001). As an example it is the expanded clay (looks like expanded perlite), which is used in many applications because of its lower density.
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Dynamic crushing of cellular materials: A unique dynamic …
Dynamic crushing of cellular materials: A unique dynamic stress–strain state curve. Author links open overlay panel Yuanyuan Ding a, Wang Shilong a, Zheng Zhijun a, Yang b, Jilin Yu a. ... This phenomenon is probably due to the decreasing velocity ahead of the plastic wave in the specimen. At last, the stress decreases from the ...
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Experimental Investigation of Particle Size Alteration and the
MATERIALS AND TEST -the title of this part should be "materials and methods" ... This paper describes selective crushing phenomenon of gangue in jaw crushing process. This is a fundamental knowledge of coal treatment, and result appear to be reasonable. However, discussions are not always clear. In addition, conclusion is not clear whether ...
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Numerical simulation of influence of coarse aggregate crushing …
However, most of the above studies regard coarse aggregate as rigid and ignore the crushing phenomena of coarse aggregate under external loads. This differs slightly from the real test results. For granular materials, particle breakage occurs when the compression stress exerted on a particle surpasses its strength.
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Research on the high-efficiency crushing, sorting and …
At present, the most commonly used processes for the separation and enrichment of the main components of lithium batteries are physical methods such as crushing and sorting (Lin et al., 2019; Liu et al., 2019; Sommerville et al., 2020; Yang et al., 2020; Zhong et al., 2019).For example, Zhang et al. performed chemical and process mineralogical …
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Dynamic crushing of cellular materials: A unique dynamic …
For example, Zheng et al. (2014) reported the quasi-static and dynamic initial crushing stresses of cellular materials are different due to different deformation mechanisms, but Barnes et al. (2014) regarded that the stress ahead of the shock front is at the same level as the first local stress maximum of the quasi-static stress-strain curve ...
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Predicting the Crushing Stress of Composite Materials
A simple mathematical model for predicting the crushing stress of the composite materials is presented in this report. The present knowledge of fracture mechanics and strength of …
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Mechanical behaviour of DEM crushable grains with …
In order to understand the fundamental behaviour of crushable materials with fines removal in wide stress range, a numerical investigation was conducted. The investigation was carried out …
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Prospects for Energy-Saving Methods of Crushing Brittle Materials …
The world demand for various types of crushed material is growing by 3—8% per year [1, 2].Crushing machines are part of the charge departments of blast-furnace and steel-making shops of metallurgical enterprises [].When preparing ore and non-metallic materials (ores, fluxes, fuel, sinter) for introduction into the metallurgical process (smelting iron and steel), the …
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A peridynamic investigation on crushing of sand particles
Particle crushing underpins important macroscopic behaviour of granular materials such as yielding, deformation, dilatancy, failure, mobility and packing features. The crushing condition and crushing ... is capable of simulating a single sand particle crushing phenomenon. The simulations offer insights into the crush-ing behaviour of single ...
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Evolution of the fractal dimension of granular materials in
To better understand the behavior of these materials, it is essential to study the phenomenon of fragmentation of grains under the stresses of earthmoving equipment, under the effect of road traffic or other solicitations (foundations load, dams, etc.). The rate or degree of crushing of the grains helps to quantify the effect of grain attrition.
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Effect of mechanical force on dissociation characteristics of …
Furthermore, the phenomenon of over crushing of Al foil is also studied. The purpose of this study is to reveal an effective dissociation method for mechanical comminution of electrode materials. 2. Materials and methods ... For shear crushing, cathode material can achieve rapid liberation within 5 s, and the liberation degree of cathode ...
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A peridynamic investigation on crushing of sand particles
Particle crushing underpins important macroscopic behaviour of granular materials such as yielding, deformation, dilatancy, failure, mobility and packing features. The crushing condition …
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Time Effects Relate to Crushing in Sand
Because particle crushing is a time-dependent phenomenon described as static fatigue or delayed fracture, the close relation between time effects and crushing in granular materials is established ...
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Quantifying the relative contributions of particle crushing …
However, the majority of previous studies on cement-stabilized recycled aggregate materials overlooked the roles of crushing recycled aggregate particles and the ITZ damage in controlling the overall strength ... the NG-70 %+RB-30 % specimens exhibited a more severe particle crushing phenomenon, shorter crack expansion paths, and even localized ...
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Evaluation of the crushing characteristics of industrial waste
To adequately represent the occurrence of material crushing and its quantification, various researchers have proposed an index representing the amount of breakage. This index is known as breakage index or relative breakage which can either be based on single sieve size [23], [24], [25] or multiple (whole set) sieve sizes [26], [27].
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An experimental investigation of work dissipation in crushable materials
An effective way to study the crushing phenomenon in sand is by taking into account the energy concept, which includes all effective issues in soil elements involving stress, strain, and the ...
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Experimental Investigation of Particle Size …
This study examines the particle size and distribution of the main chemical components of gangue during the crushing process. Coal mine gangue was chosen as the research object, and its particle size and chemical …
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(PDF) Analysis of crushing of granular material under …
There has been significant work on modeling of particle crushing using the replacement technique. Various advanced failure criteria are proposed to obtain realistic particle crushing (Ben-Nun and ...
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