2023/07/17 by R. L. C. Vink, Vink, R. L. C.
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Force Microscopy Techniques and Applications #Granular flow and fluidized beds #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.2307.08413
openalex publication_date 2023/07/17 · openalex created_date 2023/07/19 · openalex updated_date 2026/07/28
We study dissipation as a function of sample thickness in solids under global oscillatory shear applied to the top layer of the sample. Two types of damping mechanism are considered: Langevin and Dissipative Particle Dynamics (DPD). In the regime of low driving frequency, and under strain-controlled conditions, we observe that for Langevin damping, dissipation increases with sample thickness, while for DPD damping, it decreases. Under force-controlled conditions, dissipation increases with sample thickness for both damping schemes. These results can be physically understood by treating the solid as a one-dimensional harmonic chain in the quasi-static limit, for which explicit equations (scaling relations) describing dissipation as a function of chain length (sample thickness) are provided. The consequences of these results, in particular regarding the choice of damping scheme in computer simulations, are discussed.