Shape instabilities of islands in smectic films under lateral compression - Archive ouverte HAL Access content directly
Journal Articles Soft Matter Year : 2022

Shape instabilities of islands in smectic films under lateral compression

(1, 2) , (1) , (1) , (1) , (1) , (2)
1
2

Abstract

Smectic liquid crystals are fluids, and in most rheological situations they behave as such. Nevertheless, when thin freely floating films of smectic A or smectic C materials are compressed quickly in-plane, they resist such stress by buckling similar to solid membranes under lateral stress. We report experimental observations of wrinkling and bulging of finite domains within the films, so-called islands, and give a qualitative explanation of different observed patterns. Depending on the external stress and their dimensions, the islands can expel a specifically shaped bulge in their center, form radial wrinkles or develop target-like wrinkle structures. When the external stress is relaxed, these patterns disappear reversibly.
Fichier principal
Vignette du fichier
islandshapes_rev_HAL.pdf (5.86 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03713549 , version 1 (10-11-2022)

Identifiers

Cite

Amine Missaoui, Kirsten Harth, Torsten Trittel, Christoph Klopp, Ralf Stannarius, et al.. Shape instabilities of islands in smectic films under lateral compression. Soft Matter, 2022, 18 (16), pp.3193-3205. ⟨10.1039/d2sm00144f⟩. ⟨hal-03713549⟩
22 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More