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View article: Dynamics of wet granular flows down an inclined plane
Dynamics of wet granular flows down an inclined plane Open
Despite the important role of wet granular flows in numerous industrial and natural processes, their rheology in the inertial regime has only recently been formalized [T. T. Vo et al., Nat. Commun. 11, 1476 (2020)] through a single dimensi…
View article: Modeling Soft Granular Materials Under Compaction: Strain Rate Effect
Modeling Soft Granular Materials Under Compaction: Strain Rate Effect Open
Soft granular materials are assemblies of particles that undergo large deformations without breakage under load. Clay aggregates and wet agglomerates are examples of soft particles. In this paper, we study the compaction of such materials …
View article: Breakage dynamics and scaling of wet aggregates of rigid particles
Breakage dynamics and scaling of wet aggregates of rigid particles Open
The mechanical behaviour of wet particle aggregates is crucial in many granular processes such as wet granulation and soil degradation. However, the interplay of capillary and viscous forces for aggregate stability and breakage have remain…
View article: Flooding as a sub-critical instability in open channels
Flooding as a sub-critical instability in open channels Open
During floods caused by a continuous increase in river flow, the water level often rises suddenly, while the recession takes much longer. This behavior is consistent with the subcritical instability highlighted in this article. This instab…
View article: In situ X-ray CT imaging of transient water retention experiments with cyclic drainage and imbibition
In situ X-ray CT imaging of transient water retention experiments with cyclic drainage and imbibition Open
The water retention curve (WRC) represents a key function in unsaturated soil mechanics as it can be applied for the modeling of the hydro-mechanical behaviour of unsaturated soils. The macroscopic WRC is characterised by different phenome…
View article: Rheology of soft granular materials: uniaxial compression
Rheology of soft granular materials: uniaxial compression Open
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 b…
View article: Cutting and Slicing Weak Solids
Cutting and Slicing Weak Solids Open
Dicing soft solids with a sharp knife is quicker and smoother if the blade is sliding rapidly parallel to its edge in addition to the normal squeezing motion. We explain this common observation with a consistent theory suited for soft gels…
View article: Synchronous whirling of spinning homogeneous elastic cylinders: linear and weakly non-linear analyses
Synchronous whirling of spinning homogeneous elastic cylinders: linear and weakly non-linear analyses Open
Stationary whirling of slender and homogeneous (continuous) elastic shafts rotating around their axis, with pin-pin boundary condition at the ends, is revisited by considering the complete deformations in the cross section of the shaft. Th…
View article: Spinning elastic beads: a route for simultaneous measurements of the shear modulus and the interfacial energy of soft materials
Spinning elastic beads: a route for simultaneous measurements of the shear modulus and the interfacial energy of soft materials Open
We demonstrate that the elastic modulus and the surface energy constant of soft elastic materials can be simultaneously measured by analysing the deformation of millimetric beads under centrifugal forcing.
View article: Compaction of elastic granular materials: inter-particles friction effects and plastic events
Compaction of elastic granular materials: inter-particles friction effects and plastic events Open
The uni-axial compaction of granular materials made of elastic neo-Hookean particles is investigated in the quasi-static regime.
View article: Numerical simulations of the compaction of assemblies of rubberlike particles: A quantitative comparison with experiments
Numerical simulations of the compaction of assemblies of rubberlike particles: A quantitative comparison with experiments Open
Using the contact dymanics method together with the finite element method, we simulate the uniaxial compression of assemblies of elastic cylinders. The numerical model accounts for finite deformations of the particles through the neo-Hooke…
View article: A meniscus fingering instability in viscoelastic fluids
A meniscus fingering instability in viscoelastic fluids Open
We report experiments where a viscoelastic fingering instability develops at the free interface between air and a model viscoelastic fluid confined in a Hele-Shaw cell. The fluid is symmetrically stretched with constant velocity along two …
View article: The Shape of Hanging Elastic Cylinders
The Shape of Hanging Elastic Cylinders Open
Deformations of heavy elastic cylinders with their axis in the direction of earth's gravity field are investigated. The specimens, made of polyacrylamide hydrogels, are attached from their top circular cross section to a rigid plate. An eq…
View article: The shape of hanging elastic cylinders
The shape of hanging elastic cylinders Open
Equilibrium shapes of soft elastic cylinders (polyacrylamide hydrogels) resulting from the action of gravity.
View article: Brownian diffusion in a dilute field of traps is Fickean but non-Gaussian
Brownian diffusion in a dilute field of traps is Fickean but non-Gaussian Open
International audience
View article: Buckling of a spinning elastic cylinder: linear, weakly nonlinear and post-buckling analyses
Buckling of a spinning elastic cylinder: linear, weakly nonlinear and post-buckling analyses Open
An elastic cylinder spinning about a rigid axis buckles beyond a critical angular velocity, by an instability driven by the centrifugal force. This instability and the competition between the different buckling modes are investigated using…
View article: Impact of Beads and Drops on a Repellent Solid Surface: A Unified Description
Impact of Beads and Drops on a Repellent Solid Surface: A Unified Description Open
We investigate freely expanding sheets formed by ultrasoft gel beads, and liquid and viscoelastic drops, produced by the impact of the bead or drop on a silicon wafer covered with a thin layer of liquid nitrogen that suppresses viscous dis…
View article: Analysis of dense packing of highly deformed grains
Analysis of dense packing of highly deformed grains Open
International audience
View article: Highly deformed grain: from the Hertz contact limitation to a new strain field description in 2D
Highly deformed grain: from the Hertz contact limitation to a new strain field description in 2D Open
Most of the 2D studies on granular materials consider an assembly of cylindrical particles in the small deformation regime. Investigating the range of validity of the small deformation hypothesis is therefore of crucial importance in order…
View article: Highly deformed grain: from the Hertz contact limitation to a new strain field description in 2D
Highly deformed grain: from the Hertz contact limitation to a new strain field description in 2D Open
Most of the 2D studies on granular materials consider an assembly of cylindrical particles in the small deformation regime. Investigating the range of validity of the small deformation hypothesis is therefore of crucial importance in order…
View article: Experimental observations of root growth in a controlled photoelastic granular material
Experimental observations of root growth in a controlled photoelastic granular material Open
We present a novel root observation apparatus capable of measuring the mechanical evolution of both the root network and the surrounding granular medium. The apparatus consists of 11 parallel growth frames, two of them being shearable, whe…
View article: Nonequilibrium Interfacial Tension in Simple and Complex Fluids
Nonequilibrium Interfacial Tension in Simple and Complex Fluids Open
International audience