Pedestrians in static crowds are not grains, but game players

Autor: Thibault Bonnemain, Matteo Butano, Théophile Bonnet, Iñaki Echeverría-Huarte, Antoine Seguin, Alexandre Nicolas, Cécile Appert-Rolland, Denis Ullmo

Publikováno v: Physical Review E
Physical Review E, 2023, 107, pp.024612. ⟨10.1103/PhysRevE.107.024612⟩

International audience; The local navigation of pedestrians amid a crowd is generally believed to involve no anticipation beyond (at best) the avoidance of the most imminent collisions. We show that current models rooted in this belief fail to reprod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad0674adeae16933b930beaef18bc26
https://doi.org/10.1103/physreve.107.024612

Twist-Controlled Force Amplification and Spinning Tension Transition in Yarn

Autor: Antoine Seguin, Jérôme Crassous

Publikováno v: Physical Review Letters
Physical Review Letters, American Physical Society, 2022, 128 (7), pp.078002. ⟨10.1103/PhysRevLett.128.078002⟩
Physical Review Letters, 2022, 128 (7), pp.078002. ⟨10.1103/PhysRevLett.128.078002⟩

International audience; Combining experiments and numerical simulations with a mechanical-statistical model of twisted yarns, we discuss the spinning transition between a cohesionless assembly of fibers into a yarn. We show that this transition is co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a260d90d4f8f1d6efdf4e8cdc7bb73da
https://hal.archives-ouvertes.fr/hal-03629797

Experimental study of some properties of the strong and weak force networks in a jammed granular medium

Autor: Antoine Seguin

Publikováno v: Granular Matter
Granular Matter, 2020, 22 (2), pp.48. ⟨10.1007/s10035-020-01015-z⟩

We are experimentally investigating the force network of a monolayer of grains through the jamming transition. Once the packing has been compressed beyond the volume fraction of jamming $$\phi _J$$, we use particle tracking and photoelastic technique

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::185b3a6cddeb5920f106ea660f2c0f69
https://doi.org/10.1007/s10035-020-01015-z

Buckling of a rod penetrating into granular media

Autor: Philippe Gondret, Antoine Seguin

Publikováno v: Physical Review E. 98

We investigate experimentally the possible buckling of a thin rod when penetrating downwards into a granular packing. When its bottom end reaches a specific depth, the rod may start buckling provided that the embrace is not enough to stop that phenom

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::197177797871521a9b17627c95436574
https://doi.org/10.1103/physreve.98.012906

Clustering and flow around a sphere moving into a grain cloud

Autor: Antoine Seguin, Aline Lefebvre-Lepot, Philippe Gondret, Sylvain Faure

Publikováno v: European Physical Journal E: Soft matter and biological physics
European Physical Journal E: Soft matter and biological physics, 2016, 39 (6), ⟨10.1140/epje/i2016-16063-0⟩
European Physical Journal E: Soft matter and biological physics, EDP Sciences: EPJ, 2016, 39 (6), ⟨10.1140/epje/i2016-16063-0⟩

A bidimensional simulation of a sphere moving at constant velocity into a cloud of smaller spherical grains far from any boundaries and without gravity is presented with a non-smooth contact dynamics method. A dense granular “cluster” zone builds

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::186eb64bb001870ad4cd1152c97f723a
https://hal.science/hal-03030504