· A series of one-dimensional compression tests have been carried out on three kinds of granular materials in a dense state to investigate their mechanical and crushing behaviours. A new testing apparatus that can simultaneously measure the axial and lateral stresses acted on the cylindrical specimen was also developed.
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· Therefore, it is more difficult for granular materials to adjust their relative positions, and the ability to resist external deformation is stronger. In addition, particle breakage leads to higher compactness of the granular materials, and small fragments produced by particle breakage fill the pores between large broken particles to form a
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· amount of particle crushing may be predicted if the stresses and strains in the soil can be estimated, P. A. (1994). “Effect of initial relative density on instability and behavior of granular materials at high pressures,” PhD dissertation, Dept. of Civ. and 7.
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:Publish Year:1996Poul V. Lade, Jerry A. Yamamuro, Paul A. Bopp · Breakage of an artificial crushable material under loading. The mechanical behaviour of granular materials depends on their grading. Crushing of particles under
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· This approach has been used successfully for the hierarchical multiscale modelling of granular materials, in terms of various coupling formulations such as FEM–DEM coupling 182,183 and MPM–DEM
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· Fractal Pattern of Particle Crushing of Granular Geomaterials during One-Dimensional Compression. Jiru Zhang Biwen Zhang. Geology, Materials Science. Advances in Civil Engineering. 2018. This paper focuses on the effect of particle crushing on the behavior of granular geomaterials.
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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 technique during the shear process of granular materials. Sound analysis setup was implemented to direct shear box to analyze the crushing of
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Granular materials forming part of embankments, foundations, pavement structures, and rail trackstructures are subjected to both static and dynamic loads. As a result of these loads particle breakage may occur. Particle breakage causes settlements and a reduction in the hydraulic conductivity of the granularmaterial. Moreover, the elastic modulus and the
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:Pavel S. Iliev, Falk K. Wittel, Hans J. Herrmann, Hans J. HerrmannPublish Year:2019 · To quantify the amount of breakage, many particle breakage factors have been proposed. Correlations of particle breakage parameters with standard soil
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· Abstract. Biaxial compressional tests with two types of stress paths were carried out on an assembly of round bars, which can be crushed to investigate the breakage and deformation mechanisms of granular materials at the mesoscale. The following was found experimentally: (1) upon loading, the crushable rods slide, rotate and break, and
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· Abstract. 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.
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· The results show that the crushing process of granular materials can be divided into four different stages according to er-logσy curves. At the end of the second stage, there exists a yield
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· Evolution of fragment size distributions from the crushing of granular materials. Pavel S. Iliev, Falk K. Wittel, Hans J. Herrmann. We study the fragment size distributions after crushing of single and many particles under uniaxial compression inside a cylindrical container by means of numerical simulations. Under the assumption that
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· The use of an attractor for grain shape was coordinated with the attraction to an ultimate fractal GSD in a fully crushed granular system. Here, the underlying working hypothesis is that both ultimate states are achieved at the end of comminution, with obvious implications for the energetics of the process and the consequent thermodynamic
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· The prediction of the crushing strength of sands is still an unresolved problem in soil mechanics. For natural sand grains with a regular geometry, Weibull theory has long been adopted to explain the decay of a nominal crushing strength with increasing particle size. The Weibull parameters for a given soil relate strength to size, and,
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DOI: 10.1103/PhysRevE.99.012904 Corpus ID: 73472365 Evolution of fragment size distributions from the crushing of granular materials. @article{Iliev2019EvolutionOF, title={Evolution of fragment size distributions from the crushing of granular materials.}, author={Pavel S. Iliev and Falk K. Wittel and Hans J. Herrmann}, journal={Physical
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· Abstract. Determination of crushing strength of granular material is very important for assessing its suitability in various engineering and industrial applications. Laboratory investigations that
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· Scale effect also plays a vital role in the particle breakage of sand or any other granular media. Bartake et al. [132], have proposed a generalized methodology for determining the crushing
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· SIGNIFICANCE OF PARTICLE CRUSHING IN GRANULAR MATERIALS. P. Lade, J. Yamamuro, Paul A. Bopp. Published 1 April 1996. Engineering, Environmental Science. Journal of Geotechnical Engineering. Particle breakage occurs when the stresses imposed on soil particles exceed their strength. To quantify the amount of breakage,
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· This paper presents a micro and macromechanical model to estimate the grading evolution and plastic strain caused by particle crushing in the isotropic compression of granular materials. A joint-probability particle crushing criterion of the maximum contact force and the particle strength is proposed to calculate the incremental particle crushing
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· 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
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Request PDF | On Jan 4, 2005, S. Lobo-Guerrero and others published Crushing a weak granular material: Experimental numerical analyses | Find, read and cite all the research
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· Evolution of fragment size distributions from the crushing of granular materials 11 15. Eli ´ a˘ s J (2014) Simulation of railwa y ballast using crushable polyhedral particles. Powder T
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· Diversification of particle sizes is favourable for packing the material in a small volume which explains the occurrence of such a phenomenon. Here we show that the fractal nature of granular material subjected to crushing can be ‘tricked‘by substituting some of the original grains with uncrushable particles.
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· In research concerning the crushing mechanism of granular materials, natural materials-such as sand [27, 30, 36,38], soil particles [29], basalt [32], and ice particles [36] -are mostly taken as
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· Gypsum (CaSO 4) is a widely used industrial and building material.To ensure that the strength of the produced DGPs is similar to that of typical granular materials, we used the α-hemihydrate gypsum powder (α-CaSO 4 ·1/2H 2 O), with a 2-hour flexural strength of 7 MPa, an initial setting time of 8 min, and a demolding time of 30 min.
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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. 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
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· 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. As a result of these loads, particle crushing occurs. The present study
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· Determination of crushing strength of granular material is very important for assessing its suitability in various engineering and industrial applications. Laboratory investigations that would yield stress–strain behaviour, and hence, crushing strength of the granular material are extremely cumbersome and time consuming. Also,
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A series of one-dimensional compression tests have been carried out on three kinds of granular materials in a dense state to investigate their mechanical and crushing behaviours. A new testing apparatus that can simultaneously measure the axial and lateral stresses acted on the cylindrical specimen was also developed. Experimental results
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