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| 1 | Effects of particle size on crushing and deformation behaviors of rockfill materials显示文摘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 size effect on the single-particle strength and the relationship between the characteristic stress and probability of non-failure.Test data were found to be described by the Weibull distribution with the Weibull modulus of 3.24.Assemblies with uniform nominal grains were then subjected to one-dimensional compression tests at eight levels of vertical stress with a maximum of 100 MPa.The yield stress in one-dimensional compression tests increased with decreasing the particle size,which could be estimated from the single-particle crushing tests.The void ratio-vertical stress curve could be predicted by an exponential function.The particle size distribution curve increased obviously with applied stresses less than 16 MPa and gradually reached the ultimate fractal grading.The relative breakage index became constant with stress up to 64 MPa and was obtained from the ultimate grading at the fractal dimension(a?2:7).A hyperbolical function was also found useful for describing the relationship between the relative breakage index and input work during one-dimensional compression tests. | Yang Xiao Minqiang Meng Ali Daouadji Qingsheng Chen ZhijunWu Xiang Jiang | 2020 | Geoscience Frontiers2020，11，2： | 17 |
| 2 | Ontology - based resource description and discovery framework for low carbon grid networks 显示文摘 | Daouadji A Nguyen K Lemay M | 2010 | IEEE International Conference on Smart Grid Communica- tions2010，23，3： | 1 |
| 3 | An elastoplastic model for granular materials taking into account grain breakage显示文摘 | DAOUADJI A HICHER P Y RAHMA A | 2001 | European Journal of Mechanics - A/Solids2001，20，1： | 1 |
| 4 | An elastoplastic model for granular materials taking into account grain breakage显示文摘 | DAOUADJI A HICHER P Y RAHMA A | 2001 | European Journal of Mechanics A-Solids2001，20，1： | 1 |
| 5 | An elastoplastic model for granular materials taking into account grain particle breakage显示文摘 | DAOUADJI A HICHER P Y RAHMA A | | 0，，01： | 1 |
| 6 | An elastoplastic model for granular materials taking into account grain breakage显示文摘 | Ali Daouadji Pierre-Yves Hicher Afif Rahma | 2001 | European Journal of Mechanics / A Solids2001，，1： | 1 |
| 7 | Diffuse failure in geomaterials: Experiments, theory and modelling显示文摘 | DAOUADJI A DARVE F AL GALI H | 2011 | International Journal for Numerical and Analytical Methods in Geomeehanies2011，35，16： | 1 |
| 8 | Grain crushing in geoscience materials-Key issues on crushing response,measurement and modeling:Review and preface显示文摘Grain crushing is commonly encountered in deep foundation engineering,high rockfill dam engineering,railway engineering,mining engineering,coastal engineering,petroleum engineering,and other geoscience application.Grain crushing is affected by fundamental soil characteristics,such as their mineral strength,grain size and distribution,grain shape,density and specimen size,and also by external factors including stress magnitude and path,loading rate and duration,degree of saturation,temperature and geochemical environment.Crushable material becomes a series of different materials with the change in its grading during grain crushing,resulting in a decrease in strength and dilatancy and an increase in compressibility.Effects of grain crushing on strength,dilatancy,deformation and failure mechanisms have been extensively investigated through laboratory testing,discrete element method(DEM)modelling,Weibull statistics,and constitutive modelling within the framework of the extended crushing-dependent critical state theory or the energy-based theory.Eleven papers summarized in this review article for this special issue addressed the above issues in grain crushing through the advanced testing and modelling. | Yang Xiao Chandrakant SDesai Ali Daouadji Armin WStuedlein Hanlong Liu Hossam Abuel-Naga | 2020 | Geoscience Frontiers2020，11，2： | 1 |
| 9 | An elastoplastic model for granular materials taking into account grain breakage显示文摘 | DAOUADJI A HICHER P Y RAHMA A | 2001 | European Journal of Mechanics-A/Solids2001，20，1： | 1 |
| 10 | A New Higher Order Shear Deformation Model for Static Behavior of Functionally Graded Plates显示文摘In this paper,a new displacement based high-order shear deformation theory is introduced for the static response of functionally graded plate.Unlike any other theory,the number of unknown functions involved is only four,as against five in case of other shear deformation theories.The theory presented is variationally consistent,has strong similarity with classical plate theory inmany aspects,does not require shear correction factor,and gives rise to transverse shear stress variation such that the transverse shear stresses vary parabolically across the thickness satisfying shear stress free surface conditions.The mechanical properties of the plate are assumed to vary continuously in the thickness direction by a simple power-law distribution in terms of the volume fractions of the constituents.Numerical illustrations concerned flexural behavior of FG plates with Metal-Ceramic composition.Parametric studies are performed for varying ceramic volume fraction,volume fraction profiles,aspect ratios and length to thickness ratios.The validity of the present theory is investigated by comparing some of the present results with those of the classical,the first-order and the other higher-order theories.It can be concluded that the proposed theory is accurate and simple in solving the static behavior of functionally graded plates. | Tahar Hassaine Daouadji Abdelouahed Tounsi El Abbes Adda Bedia | 2013 | Advances in Applied Mathematics and Mechanics2013，5，3： | 0 |
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