2023/07/15 by Jörg Rottler, Rottler, Jörg, Céline Ruscher +3
Chemical Engineering · Materials Science · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Rheology and Fluid Dynamics Studies #Soft Condensed Matter (cond-mat.soft) #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.2307.07866
openalex publication_date 2023/07/15 · openalex created_date 2023/07/19 · openalex updated_date 2026/07/28
We present a method for computing locally varying nonlinear mechanical properties in particle simulations of amorphous solids. Plastic rearrangements outside a probed region are suppressed by introducing an external field that directly penalizes large nonaffine displacements. With increasing strength of the field, plastic deformation can be localized. We characterize the distribution of local plastic yield stresses (residual local stresses to instability) with our approach, and assess the correlation of their spatial maps with plastic activity in a model two-dimensional amorphous solid. Our approach reduces artefacts inherent in a previous method known as the "frozen matrix" approach that enforces fully affine deformation, and improves the prediction of plastic rearrangements from structural information.