Zobrazeno 1 - 10
of 522
pro vyhledávání: '"Radjai Farhang"'
Autor:
Pagano Arianna Gea, Alonso-Marroquin Fernando, Ioannidou Katerina, Radjai Farhang, O’Sullivan Catherine
Publikováno v:
E3S Web of Conferences, Vol 544, p 07009 (2024)
Geotechnical engineers need to predict the macroscopic behaviour of clays in terms of strength, stiffness, and permeability and the variation in these properties during deformation. Engineers also need to predict the influence of environmental variab
Externí odkaz:
https://doaj.org/article/05a3110f3dab4793b96df014a4e2a5b4
Autor:
Radjai Farhang
Publikováno v:
EPJ Web of Conferences, Vol 249, p 03044 (2021)
In the presence of viscous and cohesive interactions between particles, a granular flow is governed by several characteristic time and stress scales that determine its rheological properties (shear stress, packing fraction, effective viscosities). In
Externí odkaz:
https://doaj.org/article/6e2bfe80b9554057bc0fbfe24e55aafd
Publikováno v:
EPJ Web of Conferences, Vol 249, p 07002 (2021)
We study the influence of particle shape on the evolution of particle breakage process taking place inside rotating cylinders. Extensive particle dynamics simulations taking into account the dynamics of the granular flow, particle breakage, and polyg
Externí odkaz:
https://doaj.org/article/762f3c4c9c2143a3b1a0e771fd4d8ce6
Publikováno v:
EPJ Web of Conferences, Vol 249, p 11004 (2021)
We use three-dimensional particle dynamics simulations to investigate the microstructure evolution of granular material subjected to isochoric cyclic shearing, driving the system to a liquefaction state. The cyclically sheared assembly presents a rea
Externí odkaz:
https://doaj.org/article/525a8ebb8b244201903676b3fbb0d1e1
Publikováno v:
EPJ Web of Conferences, Vol 249, p 05008 (2021)
Soft granular materials are assemblies of highly deformable grains interacting via surface forces. The large grain deformations of these materials differ them from hard granular systems, in which, their behaviors are essentially governed by grain rea
Externí odkaz:
https://doaj.org/article/c230e9e935b74249a5c016fcfb1c8bff
Autor:
Azéma Emilien, Estrada Nicolas, Preechawuttipong Itthichai, Delenne Jean-Yves, Radjai Farhang
Publikováno v:
EPJ Web of Conferences, Vol 140, p 06026 (2017)
In this paper, we explore numerically the effect of particle shape on the mechanical behavior of sheared granular packings. In the framework of the Contact Dynamic (CD)Method, we model angular shape as irregular polyhedral particles, non-convex shape
Externí odkaz:
https://doaj.org/article/0de40b5b87af4d6bb2a05babc1ca42a2
Publikováno v:
EPJ Web of Conferences, Vol 140, p 03090 (2017)
Inhomogeneous velocity profiles in granular flows are well known from both experiments and simulations, and considered as a hallmark of nonlocal behavior. By means of extensive contact dynamics simulations, we show that the sigmoidal velocity profile
Externí odkaz:
https://doaj.org/article/cc3354dfbef44db99e83dbab0365719e
Autor:
Contreras Rafael Jaimes, Berger Nicolas, Izard Edouard, Douce Jean-François, Koltsov Alexey, Delenne Jean-Yves, Azema Emilien, Nezamabadi Saeid, van Loo Frédéric, Pellenq Roland, Radjai Farhang
Publikováno v:
EPJ Web of Conferences, Vol 140, p 08020 (2017)
We present an experimental and numerical investigation of the mechanical strength of crude iron ore (Hematite) granules in which capillary bonds between primary particles are the source of internal cohesion. The strength is measured by subjecting the
Externí odkaz:
https://doaj.org/article/3a4bce20688f4e93acf2df2e17e35102
Publikováno v:
EPJ Web of Conferences, Vol 140, p 08021 (2017)
We investigate the mechanical behavior of wet granular agglomerates composed of spherical particles by means of molecular dynamics simulations. The capillary cohesion force is modeled as an attraction force at the contact between two particles and ex
Externí odkaz:
https://doaj.org/article/babe099a86774426b88a39b37545182a
Publikováno v:
EPJ Web of Conferences, Vol 140, p 05013 (2017)
In soft particle materials such as metallic powders the particles can undergo large deformations without rupture. The large elastic or plastic deformations of the particles are expected to strongly affect the mechanical properties of these materials
Externí odkaz:
https://doaj.org/article/48f6ab0b83aa48dd9a1bc8130825e411