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Issue 5, 2021

Mechanical properties of 2D aggregates of oil droplets as model mono-crystals

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Abstract

We investigate the elastic and yielding properties of two dimensional defect-free mono-crystals made of highly monodisperse droplets. Crystals are compressed between two parallel boundaries of which one acts as a force sensor. As the available space between boundaries is reduced, the crystal goes through successive row-reduction transitions. For small compression forces, the crystal responds elastically until a critical force is reached and the assembly fractures in a single catastrophic global event. Correspondingly there is a peak in the force measurement associated with each row-reduction. The elastic properties of ideal mono-crystal samples are fully captured by a simple analytical model consisting of an assembly of individual capillary springs. The yielding properties of the crystal are captured with a minimal bond breaking model.

Graphical abstract: Mechanical properties of 2D aggregates of oil droplets as model mono-crystals

Supplementary files

Article information


Submitted
25 Jun 2020
Accepted
01 Dec 2020
First published
08 Dec 2020

Soft Matter, 2021,17, 1194-1201
Article type
Paper

Mechanical properties of 2D aggregates of oil droplets as model mono-crystals

J. Ono-dit-Biot, P. Soulard, S. Barkley, E. R. Weeks, T. Salez, E. Raphaël and K. Dalnoki-Veress, Soft Matter, 2021, 17, 1194 DOI: 10.1039/D0SM01165G

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