Multiscale stress dynamics in sheared liquid foams revealed by tomo-rheoscopy
(2025) In Nature Communications 16(1).- Abstract
Rheology aims at quantifying the response of materials to mechanical forcing. However, standard rheometers provide only global macroscopic quantities, such as viscoelastic moduli. They fail to capture the heterogeneous flow of soft amorphous materials at the mesoscopic scale, arising from the rearrangements of the microstructural elements, that must be accounted for to build predictive models. To address this experimental challenge, we have combined shear rheometry and time-resolved X-ray micro-tomography on 3D liquid foams used as model soft jammed materials, yielding a unique access to the stresses and contact network topology at the bubble scale. We reveal a universal scaling behavior of the local stress build-up and relaxation... (More)
Rheology aims at quantifying the response of materials to mechanical forcing. However, standard rheometers provide only global macroscopic quantities, such as viscoelastic moduli. They fail to capture the heterogeneous flow of soft amorphous materials at the mesoscopic scale, arising from the rearrangements of the microstructural elements, that must be accounted for to build predictive models. To address this experimental challenge, we have combined shear rheometry and time-resolved X-ray micro-tomography on 3D liquid foams used as model soft jammed materials, yielding a unique access to the stresses and contact network topology at the bubble scale. We reveal a universal scaling behavior of the local stress build-up and relaxation associated with topological modifications. Moreover, these plastic events redistribute stress non-locally, as if the foam were an elastic medium subjected to a quadrupolar deformation. Our findings clarify how the macroscopic elastoplastic behavior of amorphous materials emerges from the spatiotemporal stress variations induced by microstructural rearrangements.
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- author
- Schott, Florian LU ; Dollet, Benjamin ; Santucci, Stéphane ; Schlepütz, Christian Matthias ; Claudet, Cyrille ; Gstöhl, Stefan ; Raufaste, Christophe and Mokso, Rajmund LU
- organization
- publishing date
- 2025-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 16
- issue
- 1
- article number
- 9210
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:41102226
- scopus:105019093725
- ISSN
- 2041-1723
- DOI
- 10.1038/s41467-025-64412-z
- language
- English
- LU publication?
- yes
- id
- 039d3820-e655-480d-b604-ea63da35b234
- date added to LUP
- 2025-12-11 11:30:21
- date last changed
- 2025-12-12 03:00:20
@article{039d3820-e655-480d-b604-ea63da35b234,
abstract = {{<p>Rheology aims at quantifying the response of materials to mechanical forcing. However, standard rheometers provide only global macroscopic quantities, such as viscoelastic moduli. They fail to capture the heterogeneous flow of soft amorphous materials at the mesoscopic scale, arising from the rearrangements of the microstructural elements, that must be accounted for to build predictive models. To address this experimental challenge, we have combined shear rheometry and time-resolved X-ray micro-tomography on 3D liquid foams used as model soft jammed materials, yielding a unique access to the stresses and contact network topology at the bubble scale. We reveal a universal scaling behavior of the local stress build-up and relaxation associated with topological modifications. Moreover, these plastic events redistribute stress non-locally, as if the foam were an elastic medium subjected to a quadrupolar deformation. Our findings clarify how the macroscopic elastoplastic behavior of amorphous materials emerges from the spatiotemporal stress variations induced by microstructural rearrangements.</p>}},
author = {{Schott, Florian and Dollet, Benjamin and Santucci, Stéphane and Schlepütz, Christian Matthias and Claudet, Cyrille and Gstöhl, Stefan and Raufaste, Christophe and Mokso, Rajmund}},
issn = {{2041-1723}},
language = {{eng}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Nature Communications}},
title = {{Multiscale stress dynamics in sheared liquid foams revealed by tomo-rheoscopy}},
url = {{http://dx.doi.org/10.1038/s41467-025-64412-z}},
doi = {{10.1038/s41467-025-64412-z}},
volume = {{16}},
year = {{2025}},
}