Strain fluctuations and elastic moduli in disordered solids
arXiv:1503.07364 · doi:10.1103/PhysRevE.92.022307
Abstract
Recently there has been a surge in interest in using video-microscopy techniques to infer the local mechanical properties of disordered solids. One common approach is to minimize the difference between particle vibrational displacements in a local coarse-graining volume and the displacements that would result from a best-fit affine deformation. Effective moduli are then be inferred under the assumption that the components of this best-fit affine deformation tensor have a Boltzmann distribution. In this paper, we combine theoretical arguments with experimental and simulation data to demonstrate that the above does not reveal information about the true elastic moduli of jammed packings and colloidal glasses.
12 pages, 8 figures
References in corpus (5)
- Identifying structural flow defects in disordered solids using machine learning methods
- Non-affine displacements in crystalline solids in the harmonic limit
- Phonons in two-dimensional soft colloidal crystals
- Phonon Dispersion and Elastic Moduli of Two-Dimensional Disordered Colloidal Packings of Soft Particles with Frictional Interactions
- Visualizing the strain evolution during the indentation of colloidal glasses