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Effect Of Particle Shape On The Engineering Properties Of Granular Soils
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Book Synopsis Effect of Particle Shape on the Engineering Properties of Granular Soils by : E. D'Appolonia
Download or read book Effect of Particle Shape on the Engineering Properties of Granular Soils written by E. D'Appolonia and published by . This book was released on 1973 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of relative density correlations based on an "average" sand to predict soil behavior without considering the particle shape can result in poor or misleading predictions. Experimental data show that the particle shape has a pronounced effect on all engineering properties studied. Angularity of the particles increases the maximum void ratio, strength, and deformability of cohesionless soils. Variations in engineering properties due to particle shape can be as large as variations associated with large differences in relative density. Penetration tests in small containers with small rods suggest that the Standard Penetration Test is influenced by both the angularity and density of cohesionless soils.
Book Synopsis Evaluation of Relative Density and Its Role in Geotechnical Projects Involving Cohesionless Soils by : Ernest Theodore Selig
Download or read book Evaluation of Relative Density and Its Role in Geotechnical Projects Involving Cohesionless Soils written by Ernest Theodore Selig and published by ASTM International. This book was released on 1973 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour of Granular Materials by : Bernard Cambou
Download or read book Behaviour of Granular Materials written by Bernard Cambou and published by Springer. This book was released on 2014-05-04 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a complete and comprehensive analysis of the behaviour of granular materials including the description of experimental results, the different ways to define the global behaviour from local phenomena at the particle scale, the various modellings which can be used for a D.E.M. analysis to solve practical problems and finally the analysis of strain localisation. The concepts developed in this book are applicable to many kinds of granular materials considered in civil, mechanical or chemical engineering.
Book Synopsis Particulate Discrete Element Modelling by : Catherine O'Sullivan
Download or read book Particulate Discrete Element Modelling written by Catherine O'Sullivan and published by CRC Press. This book was released on 2011-04-06 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first single work on DEM providing the information to get started with this powerful numerical modelling approach. Provides the basic details of the numerical method and the approaches used to interpret the results of DEM simulations. It will be of use to professionals, researchers and higher level students, with a theoretical overview of DEM as well as practical guidance.Selected Contents: 1.Introduction 2.Use of DEM in Geomechanics 3.Calculation of Contact Forces 4.Particle Motion 5.Particle Types 6.Boundary Conditions 7.Initial Geometry and Specimen Generation 8.Time Integration and Discrete Element Modelling 9.DEM Interpretation: A Continuum Perspective 10.Postprocessing: Graphical Interpretation of DEM Simulations 11.Basic Statisti
Book Synopsis The Combined Effect of Particle Shape and Grain Size Distribution on the Critical State Parameters of Coarse-grained Soils by : Ammar Mohammed Alshammari
Download or read book The Combined Effect of Particle Shape and Grain Size Distribution on the Critical State Parameters of Coarse-grained Soils written by Ammar Mohammed Alshammari and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle shape and grain size distribution (GSD) control the mechanical response of coarse-grained soils. Based on that, several researchers have sought the link between coarse-grained soils' intrinsic properties (e.g., GSD, and particles' roughness, roundness, and aspect ratio) and the mechanical response (e.g., stiffness and strength). Unfortunately, those studies investigate the effects of particle shape descriptors and GSD on the mechanical response of coarse-grained soils separately. However, both sets of parameters are required to fully capture the mechanical behavior of the coarse-grained soils.We implemented a systematic experimental study to assess the combined effect of particle shape (i.e., roundness) and GSD on the parameters that control the critical state line in coarse-grained particles. In this regard, we evaluated the particulate material response within the critical state soil mechanics model because it is a robust framework that captures particulate materials' ultimate volumetric and shear strength response. Furthermore, the critical state soil mechanics model should be adopted while designing safe geotechnical engineering structures, as recent infrastructure failures have shown (Jefferies, 2022). We tested fifty-six mixtures made of mono-sized, bi-sizes, and poly-sized glass beads and crushed glass particles. These mixtures permit studying the combined effect of particle shape and GSD on critical state parameters. To assess the critical state friction angle, 0́Ø We deployed a rotating cylinder to capture the angle of repose of failing particulate material. 0́Ø We developed a new algorithm to systematically analyze digital images and measure particulate material's angle of repose and the void ratio at failure. The repose angle mimics the critical state friction angle of particulate materials. While for testing the critical state void ratio, 0́Ø We modified the simple method proposed by Santamarina and Cho (2001) to evaluate the critical state parameters on the void ratio-vs.-the log of the mean effective stress space. The significant advantage of our methodology is that it allows the systematic and straightforward evaluation of the effect intrinsic properties of the tested materials at low applied effective stresses to avoid particle breakage. In addition, our modifications improved the quality of the collected data. Results show that the particle shape of the small-size fractions significantly influences the critical state parameters more than the coarse-grained fractions. However, the interaction of the particle shape on different size fractions is complex. For example, the intercept of the critical state line on the compressional plane is affected by the GSD and particle shapes of both the large-size and small-size fractions. Furthermore, the results appear to be controlled by the particle shape of the large-size fractions when the small-size fractions do not fill all the void spaces left by the large-size particles. In contrast, the particle shape of the small-size fraction controls the critical state parameters when small particles fill all voids. Based on the experimental observations, interpretation, and analyses, we proposed calculating the equivalent roundness of mixtures based on the surface area. This equivalent roundness correlates well with the critical state parameters. Furthermore, the correlations provide a greater coefficient of correlations when functions include both roundness (i.e., a measure of particle shape) and coefficient of curvature (i.e., a measure of GSD). The proposed correlations allow estimating all the critical state parameters based on intrinsic properties of the coarse-grained soils' particles.
Book Synopsis The Effect of Particle Shape on the Properties of Granular Materials by : Janet Barbara Scotton
Download or read book The Effect of Particle Shape on the Properties of Granular Materials written by Janet Barbara Scotton and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geomechanics and Geotechnics of Particulate Media by : Masayuki Hyodo
Download or read book Geomechanics and Geotechnics of Particulate Media written by Masayuki Hyodo and published by CRC Press. This book was released on 2017-12-14 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscopic re-examination of geomaterials consisting of aggregates can shed light on macroscopic behaviour, including compressibility, anisotropy, yielding, creep, cyclic liquefaction and shear rupture. As a result of this process of examination, new methods of material characterization emerge, leading to a greater degree of accuracy in the specification of new constitutive models with physically-meaningful parameters. The impetus behind this development is an increasing awareness on sustainability, leading to the more efficient use of recycled materials for geotechnical applications. The characteristics of recycled materials, such as compressibility and self-hardening, may differ significantly from those of natural materials, and it is crucial that evaluation is made from a specifically particulate perspective.
Book Synopsis Correlations of Soil and Rock Properties in Geotechnical Engineering by : Jay Ameratunga
Download or read book Correlations of Soil and Rock Properties in Geotechnical Engineering written by Jay Ameratunga and published by Springer. This book was released on 2015-12-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a one-stop reference to the empirical correlations used extensively in geotechnical engineering. Empirical correlations play a key role in geotechnical engineering designs and analysis. Laboratory and in situ testing of soils can add significant cost to a civil engineering project. By using appropriate empirical correlations, it is possible to derive many design parameters, thus limiting our reliance on these soil tests. The authors have decades of experience in geotechnical engineering, as professional engineers or researchers. The objective of this book is to present a critical evaluation of a wide range of empirical correlations reported in the literature, along with typical values of soil parameters, in the light of their experience and knowledge. This book will be a one-stop-shop for the practising professionals, geotechnical researchers and academics looking for specific correlations for estimating certain geotechnical parameters. The empirical correlations in the forms of equations and charts and typical values are collated from extensive literature review, and from the authors' database.
Book Synopsis A Micromechanical Investigation of the Effect of Fabric and Particle Shape on the Response of Granular Soils by : Chrysovalantis Tsinginos
Download or read book A Micromechanical Investigation of the Effect of Fabric and Particle Shape on the Response of Granular Soils written by Chrysovalantis Tsinginos and published by . This book was released on 2012 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Shape and Stiffness by : Jake Steven Dodds
Download or read book Particle Shape and Stiffness written by Jake Steven Dodds and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle shape is evaluated on three scales corresponding to form, roundness and roughness. Shape at each of these scales uniquely influences material behavior. The shape of sand grains is largely formed as magma cools. Subsequent cleavage and abrasion change the roundness and roughness of particles. Published results indicate that particle shape influences several aspects of granular systems behavior including stiffness, strength, the evolution of strength anisotropy, dilation, and the development of strain localization. crushing of granite creates a particulate material with a unique angular shape. A wide range of the experimental studies implemented as part of this research permit assembling a unique database of material parameters and comparing the behavior of several crushed and natural sands. In general, the low roundness of crushed sands leads to higher maximum void ratios, lower small strain stiffnesses, and higher critical state friction angles than more rounded natural sands. It also impacts mortar strength and workability. Previous studies have emphasized size-controlled segregation. New experimental results show that differences in particle shape can also lead to segregation in a binary granular material. Round or spherical particles are more mobile than angular or flat particles. Then, the greater motion of round or spherical particles in a binary mixture subjected to horizontal or vertical vibration results in their segregation from their angular or flat neighbors. Particle shape may change significantly with stress in the case of soft particles. Therefore, the presence of shape-deformable particles decreases the stiffness of binary rigid-soft particle mixtures. However, macro-scale measurements with rigid-soft mixtures show higher stiffness than would be expected by volume averaging techniques. A subsequent microscale study shows the formation of backbone chains made of the rigid particles, partially supported by the soft particles which prevent the buckling of the load-carrying chains.
Book Synopsis Track Geotechnology and Substructure Management by : Ernest Theodore Selig
Download or read book Track Geotechnology and Substructure Management written by Ernest Theodore Selig and published by Thomas Telford. This book was released on 1994-10-05 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive study provides practical advice and guidance on the important topics of rail transport and ground engineering, the use of which will result in optimum quality with the minimum maintenance effort and the most economical use of resources. The authors have synthesized all of their international knowledge and experience in this field, and produced, for the first time, a definitive guide for the design, construction, maintenance and renewal of railway track as they relate to geotechnology.
Book Synopsis Evaluation of Relative Density and Its Role in Geotechnical Projects Involving Cohesionless Soils by : Ernest Theodore Selig
Download or read book Evaluation of Relative Density and Its Role in Geotechnical Projects Involving Cohesionless Soils written by Ernest Theodore Selig and published by ASTM International. This book was released on 1973 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Powder Technology by : Kōichi Iinoya
Download or read book Powder Technology written by Kōichi Iinoya and published by Taylor & Francis Group. This book was released on 1984 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Importance of the Particle Shape on Mechanical Properties of Soil Materials by :
Download or read book Importance of the Particle Shape on Mechanical Properties of Soil Materials written by and published by . This book was released on 2013 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Pipe Piles in Sand by : Magued Iskander
Download or read book Behavior of Pipe Piles in Sand written by Magued Iskander and published by Springer Science & Business Media. This book was released on 2011-01-17 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major difficulties in predicting the capacity of pipe piles in sand has resulted from a lack of understanding of the physical processes that control the behavior of piles during installation and loading. This monograph presents a detailed blue print for developing experimental facilities necessary to identify these processes. These facilities include a unique instrumented double-walled pipe-pile that is used to delineate the frictional stresses acting against the external and internal surfaces of the pile. The pile is fitted with miniature pore-pressure transducers to monitor the generation of pore water pressure during installation and loading. A fast automatic laboratory pile hammer capable of representing the phenomena that occur during pile driving was also developed and used.
Book Synopsis Constitutive Modeling of Geomaterials by : Qiang Yang
Download or read book Constitutive Modeling of Geomaterials written by Qiang Yang and published by Springer Science & Business Media. This book was released on 2012-08-22 with total page 779 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second International Symposium on Constitutive Modeling of Geomaterials: Advances and New Applications (IS-Model 2012), is to be held in Beijing, China, during October 15-16, 2012. The symposium is organized by Tsinghua University, the International Association for Computer Methods and Advances in Geomechanics (IACMAG), the Committee of Numerical and Physical Modeling of Rock Mass, Chinese Society for Rock Mechanics and Engineering, and the Committee of Constitutive Relations and Strength Theory, China Institution of Soil Mechanics and Geotechnical Engineering, China Civil Engineering Society. This Symposium follows the first successful International Workshop on Constitutive Modeling held in Hong Kong, which was organized by Prof. JH Yin in 2007. Constitutive modeling of geomaterials has been an active research area for a long period of time. Different approaches have been used in the development of various constitutive models. A number of models have been implemented in the numerical analyses of geotechnical structures. The objective of the symposium is to provide a forum for researchers and engineers working or interested in the area of constitutive modeling to meet together and share new ideas, achievements and experiences through presentations and discussions. Emphasis is placed on recent advances of constitutive modeling and its applications in both theoretic and experimental aspects. Six famous scholars have been invited for the plenary speeches of the symposiums. Some prominent scholars have been invited to organize four specialized workshops on hot topics, including “Time-dependent stress-strain behavior of geomaterials”, “Constitutive modeling within critical state soil mechanics”, “Multiscale and multiphysics in geomaterials”, and “Damage to failure in rock structures”. A total of 49 papers are included in the above topics. In addition, 51 papers are grouped under three topics covering “Behaviour of geomaterials”, “Constitutive model”, and “Applications”. The editors expect that the book can be helpful as a reference to all those in the field of constitutive modeling of geomaterials.
Book Synopsis Effect of Shape, Size and Surface Roughness of Aggregate Particles on the Strength of Granular Materials by :
Download or read book Effect of Shape, Size and Surface Roughness of Aggregate Particles on the Strength of Granular Materials written by and published by . This book was released on 1956* with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
