Drop-on-coilable-fibre systems exhibit negative stiffness events and transitions in coiling morphology

Abstract : We investigate the mechanics of elastic fibres carrying liquid droplets. In such systems, buckling may localize inside the drop cavity if the fibre is thin enough. This so-called drop-on-coilable-fibre system exhibits a surprising liquid-like response under compression, and a solid-like response under tension. Here we analyze this unconventional behavior in further details and find theoretical, numerical and experimental evidences of negative stiffness events. We find that the first and main negative stiffness regime owes its existence to the transfer of capillary-stored energy into mechanical curvature energy. The following negative stiffness events are associated with changes in the coiling morphology of the fibre. Eventually coiling becomes tightly locked into an ordered phase where liquid and solid deformations coexist.
Type de document :
Article dans une revue
Soft Matter, Royal Society of Chemistry, 2017, 13 (33), pp.5509 - 5517. 〈10.1039/C7SM00368D〉
Liste complète des métadonnées

http://hal.upmc.fr/hal-01582510
Contributeur : Gestionnaire Hal-Upmc <>
Soumis le : mercredi 6 septembre 2017 - 10:11:30
Dernière modification le : mercredi 21 mars 2018 - 18:58:23

Lien texte intégral

Identifiants

Collections

Citation

Hervé Elettro, Fritz Vollrath, Arnaud Antkowiak, Sébastien Neukirch. Drop-on-coilable-fibre systems exhibit negative stiffness events and transitions in coiling morphology. Soft Matter, Royal Society of Chemistry, 2017, 13 (33), pp.5509 - 5517. 〈10.1039/C7SM00368D〉. 〈hal-01582510〉

Partager

Métriques

Consultations de la notice

59