WorldCat Identities

Nader, Francois

Overview
Works: 7 works in 10 publications in 2 languages and 14 library holdings
Roles: Author
Publication Timeline
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Most widely held works by Francois Nader
Choosing your battles creating realistic and relevant cultural change by Francois Nader( )

2 editions published in 2013 in English and held by 3 WorldCat member libraries worldwide

Effectively managing the relationship between the CEO and the Board of Directors by Peter J Dalton( )

2 editions published in 2010 in English and held by 3 WorldCat member libraries worldwide

Shareholder engagement : how C-level executives are working more closely with their shareholders by Bertrand Loy( )

2 editions published in 2015 in English and held by 2 WorldCat member libraries worldwide

"Featuring the executives from Entegris, NPH Pharma, and The Palmer Family of Companies, this ExecBlueprint will show you how to create shareholder engagement with as few as one major shareholder or as many as hundreds of them. --
Effect of micro and macro parameters in 3D modeling of grain crushing by François Nader( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Grain breakage under uniaxial compression using a three-dimensional discrete element method by François Nader( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Modélisation de la rupture 3D des grains polyédriques par éléments discrets = delling 3D breakage of polyhedral grains using the discrete elements method by François Nader( Book )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

Rockfill structures are very popular among civil engineering structures (dams, retaining walls, . . . ). Important settlements can take place during the lifetime of these structures, settlements mainly caused by the breakage of rockfill grains. This thesis proposes a numerical model that allows the simulation of the behavior of granular materials exhibiting grain breakage. To take into account the discrete nature of these media, the discrete element method is chosen. The adopted strategy is the Non-Smooth Contact Dynamics method, where grains are considered to be rigid. To generate blocks having complex shapes, a 3D grain model is suggested. This grain model is then discretized into tetrahedral subgrains, joined together using cohesive bonds so that breakage can be simulated. A Mohr-Coulomb failure criterion is used for the cohesive bonds. The model is implemented into the LMGC90 software platform. At first, the model is tested in single grain crushing simulations between two plates. Multiple parameters controling the strength of the grain are studied : the intra-granular cohesion, the size, the discretization and the orientation of the grain. The scale effect that characterizes this type of material is verified. Then the model is tested in numerical simulations of œdometric compression of rockfill. The influence of the parameters of the model and of those of the granular medium are studied. The results of œdometric simulations are compared to experimental results, and present a good agreement. Lastly, numerical experimentations are conducted in order to study the energies that are brought into play in the simulations. The surface creation energy is estimated for this type of material. Results are close to the data provided in the literature
Modélisation de la rupture 3D des grains polyédriques par éléments discrets by François Nader( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

Rockfill structures are very popular among civil engineering structures (dams, retaining walls, . . . ). Important settlements can take place during the lifetime of these structures, settlements mainly caused by the breakage of rockfill grains. This thesis proposes a numerical model that allows the simulation of the behavior of granular materials exhibiting grain breakage. To take into account the discrete nature of these media, the discrete element method is chosen. The adopted strategy is the Non-Smooth Contact Dynamics method, where grains are considered to be rigid. To generate blocks having complex shapes, a 3D grain model is suggested. This grain model is then discretized into tetrahedral subgrains, joined together using cohesive bonds so that breakage can be simulated. A Mohr-Coulomb failure criterion is used for the cohesive bonds. The model is implemented into the LMGC90 software platform. At first, the model is tested in single grain crushing simulations between two plates. Multiple parameters controling the strength of the grain are studied : the intra-granular cohesion, the size, the discretization and the orientation of the grain. The scale effect that characterizes this type of material is verified. Then the model is tested in numerical simulations of œdometric compression of rockfill. The influence of the parameters of the model and of those of the granular medium are studied. The results of œdometric simulations are compared to experimental results, and present a good agreement. Lastly, numerical experimentations are conducted in order to study the energies that are brought into play in the simulations. The surface creation energy is estimated for this type of material. Results are close to the data provided in the literature
 
Audience Level
0
Audience Level
1
  General Special  
Audience level: 0.60 (from 0.22 for Grain brea ... to 0.97 for Grain brea ...)

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