TY  - JOUR
AU  - Hendricks, Jan
AU  - Louhichi, Ameur
AU  - Metri, Vishal
AU  - Fournier, Rémi
AU  - Reddy, Naveen
AU  - Bouteiller, Laurent
AU  - Cloitre, Michel
AU  - Clasen, Christian
AU  - Vlassopoulos, Dimitris
AU  - Briels, Willem
TI  - Nonmonotonic Stress Relaxation after Cessation of Steady Shear Flow in Supramolecular Assemblies
JO  - Physical review letters
VL  - 123
IS  - 21
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2020-00154
SP  - 218003
PY  - 2019
AB  - Stress relaxation upon cessation of shear flow is known to be described by single-mode or multimode monotonic exponential decays. This is considered to be ubiquitous in nature. However, we found that, in some cases, the relaxation becomes anomalous in that an increase in the relaxing stress is observed. Those observations were made for physicochemically very different systems, having in common, however, the presence of self-associating units generating structures at large length scales. The nonmonotonic stress relaxation can be described phenomenologically by a generic model based on a redistribution of energy after the flow has stopped. When broken bonds are reestablished after flow cessation, the released energy is partly used to locally increase the elastic energy by the formation of deformed domains. If shear has induced order such that these elastic domains are partly aligned, the reestablishing of bonds gives rise to an increase of the overall stress.
LB  - PUB:(DE-HGF)16
C6  - pmid:31809142
UR  - <Go to ISI:>//WOS:000498063400009
DO  - DOI:10.1103/PhysRevLett.123.218003
UR  - https://juser.fz-juelich.de/record/872663
ER  -