Transient dynamics of soft particle glasses in startup shear flow. Part II: Memory and aging
| dc.creator | Di Dio, Bruno Flavio | |
| dc.creator | Khabaz, Fardin | |
| dc.creator | Bonnecaze, Roger T. | |
| dc.creator | Cloitre, Michel | |
| dc.date.accessioned | 2024-02-16T13:32:44Z | |
| dc.date.available | 2024-02-16T13:32:44Z | |
| dc.date.issued | 2022-07-01 | |
| dc.description.abstract | We explore the rheology during a startup flow of well-characterized polyelectrolyte microgel suspensions, which form soft glasses above the jamming concentration. We present and discuss results measured using different mechanical histories focusing on the variations of the static yield stress and yield strain. The behavior of the shear stress growth function is affected by long-lived residual stresses and strains that imprint a slowly decaying mechanical memory inside the materials. The startup flow response is not reversible upon flow reversal and the amplitude of the static yield stress increases with the time elapsed after rejuvenation. We propose an experimental protocol that minimizes the directional memory and we analyze the effect of aging. The static yield strain γp and the reduced static yield stress σp/σy, where σy is the dynamic yield stress measured from steady flow measurements, are in good agreement with our previous simulations [Khabaz et al., “Transient dynamics of soft particle glasses in startup shear flow. Part I: Microstructure and time scales,” J. Rheol. 65, 241 (2021)]. Our results demonstrate the need to consider memory and aging effects in transient measurements on soft particle glasses. | |
| dc.description.department | Center for Dynamics and Control of Materials | |
| dc.description.sponsorship | B.F.D.D. and M.C. acknowledge financial support from the Innovative Training Network Dodynet (European Program No. H2020-MSCA-ITN-2017; Grant Agreement No. 765811). They are indebted to Jean-Marc Suau (Coatex SAS) who provided the microgels used in this study. They also thank Andre Braun and Jörg Laeuger from Anton Paar for their technical help in the optimization of the transient measurements. F.K. and R.T.B. gratefully acknowledge financial support from the National Science Foundation (NSF) (MRSEC under Award No. DMR-1720595). | |
| dc.identifier.citation | Di Dio, BF; Khabaz, F; Bonnecaze, RT; Cloitre, M. Transient dynamics of soft particle glasses in startup shear flow. Part II: Memory and aging. J. Rheol. 2022, 66(4), 717-730. DOI: 10.1122/8.0000448. | |
| dc.identifier.doi | DOI: 10.1122/8.0000448. | |
| dc.identifier.uri | https://hdl.handle.net/2152/123688 | |
| dc.identifier.uri | https://doi.org/10.26153/tsw/50482 | |
| dc.language.iso | en_US | |
| dc.publisher | AIP Publishing | |
| dc.relation.ispartof | Center for Dynamics and Control of Materials Publications | |
| dc.rights.restriction | Open | |
| dc.subject | shear flow | |
| dc.title | Transient dynamics of soft particle glasses in startup shear flow. Part II: Memory and aging | |
| dc.type | Article |