Strain-controlled critical slowing down in the rheology of disordered networks

  • Networks and dense suspensions frequently reside near a boundary between soft (or fluidlike) and rigid (or solidlike) regimes. Transitions between these regimes can be driven by changes in structure, density, or applied stress or strain. In general, near the onset or loss of rigidity in these systems, dissipation-limiting heterogeneous nonaffine rearrangements dominate the macroscopic viscoelastic response, giving rise to diverging relaxation times and power-law rheology. Here, we describe a simple quantitative relationship between nonaffinity and the excess viscosity. We test this nonaffinity-viscosity relationship computationally and demonstrate its rheological consequences in simulations of strained filament networks and dense suspensions. We also predict critical signatures in the rheology of semiflexible and stiff biopolymer networks near the strain stiffening transition.

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Metadaten
Author:Jordan L. Shivers, Abhinav SharmaGND, Fred C. MacKintosh
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/103903
ISSN:1079-7114OPAC
ISSN:0031-9007OPAC
Parent Title (English):Physical Review Letters
Publisher:American Physical Society
Type:Article
Language:English
Year of first Publication:2023
Release Date:2023/05/02
Volume:131
Issue:17
First Page:178201
DOI:https://doi.org/10.1103/PhysRevLett.131.178201
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik II