Crystalline and polycrystalline regimes in a periodically sheared 2-dimensional system of disks

2024/11/06 by Siyuan Su, Su, Siyuan, Jie Zhang +5
Engineering · Materials Science · #Brake Systems and Friction Analysis #FOS: Physical sciences #Liquid Crystal Research Advancements #Material Dynamics and Properties #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.2411.03667

openalex publication_date 2024/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A layer of monodisperse circular steel disks in a nearly square horizontal cell forms, for shear amplitudes SA ≤ 0.08, hexagonal close-packed crystallites that grow and merge until a single crystal fills the container. Increasing the shear amplitude leads to another reproducible regime, 0.21 ≤ SA ≤ 0.27, where a few large polycrystallites grow, shrink, and rotate with shear cycling, but do not evolve into a single crystal that fills the container. These results are robust within certain ranges of applied pressure and shear frequency.

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