Cohesion of bird nests
One striking difference between aggregates of flexible frictional fibres and other granular materials like rigid spheres is the effective cohesion of their assembly. While glue or capillary bridges are needed to shape aggregates of spherical particles and build sandcastles, for fibres, no need for g...
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EDP Sciences
2021-01-01
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doaj-78b1ca32bf114e4ba3666caec5bfb54f2021-08-02T22:39:03ZengEDP SciencesEPJ Web of Conferences2100-014X2021-01-012490601410.1051/epjconf/202124906014epjconf_pg2021_06014Cohesion of bird nestsAndrade-Silva Ignacio0Godefroy Théo1Pouliquen Olivier2Marthelot Joel3Aix-Marseille University, CNRS, IUSTI (Institut Universitaire des Systémes Thermiques Industriels)Aix-Marseille University, CNRS, IUSTI (Institut Universitaire des Systémes Thermiques Industriels)Aix-Marseille University, CNRS, IUSTI (Institut Universitaire des Systémes Thermiques Industriels)Aix-Marseille University, CNRS, IUSTI (Institut Universitaire des Systémes Thermiques Industriels)One striking difference between aggregates of flexible frictional fibres and other granular materials like rigid spheres is the effective cohesion of their assembly. While glue or capillary bridges are needed to shape aggregates of spherical particles and build sandcastles, for fibres, no need for glue to build a nest. Here we study an assembly of mono disperse flexible fibres. We first use X-ray microtomography to characterise the geometry of the initial assembly, the number of contact points and mean curvatures of the fibres. Using forcedisplacement measurements, we characterise the macroscopic cohesive strength of the aggregate by varying the geometry of the fibres, the fibres mechanicals properties and the packing of the preparation. Finally, we relate the macroscopic mechanical behaviour of the assembly with the filament reorganisation at the microscopic scale.https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_06014.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Andrade-Silva Ignacio Godefroy Théo Pouliquen Olivier Marthelot Joel |
spellingShingle |
Andrade-Silva Ignacio Godefroy Théo Pouliquen Olivier Marthelot Joel Cohesion of bird nests EPJ Web of Conferences |
author_facet |
Andrade-Silva Ignacio Godefroy Théo Pouliquen Olivier Marthelot Joel |
author_sort |
Andrade-Silva Ignacio |
title |
Cohesion of bird nests |
title_short |
Cohesion of bird nests |
title_full |
Cohesion of bird nests |
title_fullStr |
Cohesion of bird nests |
title_full_unstemmed |
Cohesion of bird nests |
title_sort |
cohesion of bird nests |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2021-01-01 |
description |
One striking difference between aggregates of flexible frictional fibres and other granular materials like rigid spheres is the effective cohesion of their assembly. While glue or capillary bridges are needed to shape aggregates of spherical particles and build sandcastles, for fibres, no need for glue to build a nest. Here we study an assembly of mono disperse flexible fibres. We first use X-ray microtomography to characterise the geometry of the initial assembly, the number of contact points and mean curvatures of the fibres. Using forcedisplacement measurements, we characterise the macroscopic cohesive strength of the aggregate by varying the geometry of the fibres, the fibres mechanicals properties and the packing of the preparation. Finally, we relate the macroscopic mechanical behaviour of the assembly with the filament reorganisation at the microscopic scale. |
url |
https://www.epj-conferences.org/articles/epjconf/pdf/2021/03/epjconf_pg2021_06014.pdf |
work_keys_str_mv |
AT andradesilvaignacio cohesionofbirdnests AT godefroytheo cohesionofbirdnests AT pouliquenolivier cohesionofbirdnests AT marthelotjoel cohesionofbirdnests |
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