Mechanical properties of 2D aggregates of oil droplets as model mono-crystals. Issue 5 (18th December 2020)

• Record Type: Journal Article
• Authors: Ono-dit-Biot, Jean-Christophe; Soulard, Pierre; Barkley, Solomon; Weeks, Eric R.; Salez, Thomas; Raphaël, Elie; Dalnoki-Veress, Kari
• Is Part Of: Soft matter. Volume 17:Issue 5(2021)
• Page Start: 1194
• Page End: 1201
• Publication Date: 2020-12-18
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/d0sm01165g
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : We investigate the elastic and yielding properties of two dimensional defect-free mono-crystals made of highly monodisperse droplets. 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.