Jonathan Barés
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View article: Automated identification of honey bee pollen loads for field‐applied palynological studies
Automated identification of honey bee pollen loads for field‐applied palynological studies Open
Summary In a changing world, it is crucial to characterise communities and their evolution over time. Because social insect pollinators forage on flowering plants around the colony, the nest potentially contains important information about…
View article: Flow regimes and repose angle in a rotating drum filled with highly concave particles
Flow regimes and repose angle in a rotating drum filled with highly concave particles Open
We present a series of experiments investigating the flow regimes and repose angles of highly concave particle packings in a rotating drum. By varying grain geometry from spherical to highly nonconvex shapes, adjusting frictional propertie…
View article: Experimental Study of Granular Materials Composed of Platonic Polipods: Exploring Geometric Cohesion and Solid Fraction
Experimental Study of Granular Materials Composed of Platonic Polipods: Exploring Geometric Cohesion and Solid Fraction Open
In this study, we explored the stability and compactness of columns formed from highly irregular particles. These particles, known as Platonic polypods, are fashioned by extruding arms onto the faces of Platonic solids, for which we system…
View article: Steady granular flow in a rotating drum: A theoretical nonlocal model for characterizing stress, velocity, and packing fraction profiles, encompassing grain shape effects from convex to highly concave
Steady granular flow in a rotating drum: A theoretical nonlocal model for characterizing stress, velocity, and packing fraction profiles, encompassing grain shape effects from convex to highly concave Open
In this work, we investigate the effect of particle shape, ranging from spherical to highly concave, on steady flows in a rotating drum, a system that facilitates a continuous transition from a jamming state at greater depths to an unjammi…
View article: Experimental exploration of geometric cohesion and solid fraction in columns of highly non-convex Platonic polypods
Experimental exploration of geometric cohesion and solid fraction in columns of highly non-convex Platonic polypods Open
In this study, we investigate the stability and solid fraction of columns comprised of highly non-convex particles. These particles are constructed by extruding arms onto the faces of Platonic solids, a configuration we term Platonic polyp…
View article: Flow regimes and repose angle in a rotating drum filled with highly concave particles
Flow regimes and repose angle in a rotating drum filled with highly concave particles Open
We present a series of experiments investigating the flow regimes and repose angles of highly concave particle packings in a rotating drum. By varying grain geometry from spherical to highly non-convex shapes, adjusting frictional properti…
View article: Experimental exploration of geometric cohesion and solid fraction in columns of highly non-convex Platonic polypods
Experimental exploration of geometric cohesion and solid fraction in columns of highly non-convex Platonic polypods Open
In this study, we investigate the stability and solid fraction of columns comprised of highly non-convex particles. These particles are constructed by extruding arms onto the faces of Platonic solids, a configuration we term \emph{Platonic…
View article: Geometric cohesion in two-dimensional systems composed of star-shaped particles
Geometric cohesion in two-dimensional systems composed of star-shaped particles Open
Using a discrete element method, we investigate the phenomenon of geometric cohesion in granular systems composed of star-shaped particles with 3 to 13 arms. This was done by analyzing the stability of columns built with these particles an…
View article: Loss of memory of an elastic line on its way to limit cycles
Loss of memory of an elastic line on its way to limit cycles Open
Oscillatory-driven amorphous materials forget their initial configuration and converge to limit cycles. Here we investigate this memory loss under a nonquasistatic drive in a minimal model system, with quenched disorder and memory encoded …
View article: Steady Granular Flow in a Rotating Drum: Universal description of stress, velocity and packing fraction profiles covering grain shape effects from convex to very concave
Steady Granular Flow in a Rotating Drum: Universal description of stress, velocity and packing fraction profiles covering grain shape effects from convex to very concave Open
The flow behavior of granular matter is significantly influenced by the shape of constituent particles. This effect is particularly pronounced for very concave particles, which exhibit unique flow characteristics such as higher porosity an…
View article: Monitored indentation for the detection of inclusions in elastomer material
Monitored indentation for the detection of inclusions in elastomer material Open
The detection of inclusions in soft material is of great interest, especially in the medical field. Traditionally, a biopsy exam is performed after palpation, when necessary. In the present work, a potentially quantitative method, via moni…
View article: Compacting an assembly of soft balls far beyond the jammed state: Insights from three-dimensional imaging
Compacting an assembly of soft balls far beyond the jammed state: Insights from three-dimensional imaging Open
International audience
View article: Sensor-Based Behavior Analysis and Modeling for the Honeybee Superorganism: A Platform
Sensor-Based Behavior Analysis and Modeling for the Honeybee Superorganism: A Platform Open
International audience
View article: Loss of memory of an elastic line on its way to limit cycles
Loss of memory of an elastic line on its way to limit cycles Open
Under an oscillating mechanical drive, an amorphous material progressively forgets its initial configuration and might eventually converge to a limit cycle. Beyond quasistatic drivings, how structurally disordered systems lose or record su…
View article: Compacting an assembly of soft balls far beyond the jammed state: insights from 3D imaging
Compacting an assembly of soft balls far beyond the jammed state: insights from 3D imaging Open
Very soft grain assemblies have unique shape-changing capabilities that allow them to be compressed far beyond the rigid jammed state by filling void spaces more effectively. However, accurately following the formation of these systems by …
View article: Experimental validation of a micromechanically based compaction law for mixtures of soft and hard grains
Experimental validation of a micromechanically based compaction law for mixtures of soft and hard grains Open
In this Letter, we report on an experimental study which analyzes the compressive behavior of two-dimensional bidisperse granular assemblies made of soft (hyperelastic) and hard grains in varying proportions (κ is the portion of soft grain…
View article: Extreme Poisson's Ratios Recorded In The Secondary Phloem Of Malvaceae (online data)
Extreme Poisson's Ratios Recorded In The Secondary Phloem Of Malvaceae (online data) Open
This zip file contains two dataset (in xl format), namely the experimental results and the parametric study in relation to the published article
View article: Extreme Poisson's Ratios Recorded In The Secondary Phloem Of Malvaceae (online data)
Extreme Poisson's Ratios Recorded In The Secondary Phloem Of Malvaceae (online data) Open
This zip file contains two dataset (in xl format), namely the experimental results and the parametric study in relation to the published article
View article: Softer than soft: Diving into squishy granular matter
Softer than soft: Diving into squishy granular matter Open
Softer than soft, squishy granular matter is composed of grains capable of significantly changing their shape (typically a deformation larger than 10%) without tearing or breaking. Because of the difficulty to test these materials experime…
View article: Fabrication of Radio-Opaque and Macroporous Injectable Calcium Phosphate Cement
Fabrication of Radio-Opaque and Macroporous Injectable Calcium Phosphate Cement Open
The aim of this work was the development of injectable radio-opaque and macroporous calcium phosphate cement (CPC) to be used as a bone substitute for the treatment of pathologic vertebral fractures. A CPC was first rendered radio-opaque b…
View article: Softer than soft: diving into squishy granular matter
Softer than soft: diving into squishy granular matter Open
Softer than soft, squishy granular matter is composed of grains capable of significantly changing their shape (typically larger than 10% of deformation) without tearing or breaking. Because of the difficulty to test these materials experim…
View article: Three-dimensional compaction of soft granular packings
Three-dimensional compaction of soft granular packings Open
This paper analyzes the compaction behavior of assemblies composed of soft (elastic) spherical particles beyond the jammed state, using three-dimensional non-smooth contact dynamic simulations.
View article: Experimental validation of a micromechanically-based compaction law for soft/hard grain mixtures
Experimental validation of a micromechanically-based compaction law for soft/hard grain mixtures Open
In this letter, we report on an experimental study which analyzes the compressive behavior of 2D bidisperse granular assemblies made of soft (hyperelastic) and hard grains in varying proportions ($κ$). By means of a recently developed unia…
View article: Micromechanical description of the compaction of soft pentagon assemblies
Micromechanical description of the compaction of soft pentagon assemblies Open
We analyze the isotropic compaction of assemblies composed of soft pentagons interacting through classical Coulomb friction via numerical simulations. The effect of the initial particle shape is discussed by comparing packings of pentagons…
View article: Controlling crackling dynamics by triggering low-intensity avalanches
Controlling crackling dynamics by triggering low-intensity avalanches Open
We examine the effect of small, spatially localized excitations applied periodically in different manners, on the crackling dynamics of a brittle crack driven slowly in a heterogeneous solid. When properly adjusted, these excitations are o…
View article: A micro-mechanical compaction model for granular mix of soft and rigid particles
A micro-mechanical compaction model for granular mix of soft and rigid particles Open
We use bi-dimensional non-smooth contact dynamics simulations to analyze the isotropic compaction of mixtures composed of rigid and deformable incompressible particles. Deformable particles are modeled using the finite-element method and f…
View article: Strain dependent vorticity in sheared granular media
Strain dependent vorticity in sheared granular media Open
Displacement fields in sheared particle packings often display vortex-like structures that reveal essential features about the mechanical state of the collection of particles. There are several metrics to quantify these flow field features…
View article: Highly strained mixtures of bidimensional soft and rigid grains: an experimental approach from the local scale
Highly strained mixtures of bidimensional soft and rigid grains: an experimental approach from the local scale Open
Granular systems are not always homogeneous and can be composed of grains with very different mechanical properties. To improve our understanding of the behavior of real granular systems, in this experimental study, we compress 2D bidispers…