The role of elasticity in thixotropy: Transient elastic stress during stepwise reduction in shear rate

Jiho Choi; Matthew Armstrong; Simon A. Rogers

doi:10.1063/5.0042579

The role of elasticity in thixotropy: Transient elastic stress during stepwise reduction in shear rate

Jiho Choi, Matthew Armstrong, Simon A. Rogers

Research output: Contribution to journal › Article › peer-review

Abstract

Despite the wide-spread use and importance of thixotropic materials, accurate theoretical descriptions are still limited to a handful of model transient flow conditions. We employ an iterative series of tests to experimentally probe the complex dynamics exhibited by thixotropic materials. We use flow cessation tests to identify transient elastic stresses during stress jump tests. It is shown that the evolution of the elastic stress closely follows that of total stress in the series of stress jump tests, indicating that elasticity is a significant contributor to thixotropy.

Original language	English (US)
Article number	033112
Journal	Physics of fluids
Volume	33
Issue number	3
DOIs	https://doi.org/10.1063/5.0042579
State	Published - Mar 1 2021

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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title = "The role of elasticity in thixotropy: Transient elastic stress during stepwise reduction in shear rate",

abstract = "Despite the wide-spread use and importance of thixotropic materials, accurate theoretical descriptions are still limited to a handful of model transient flow conditions. We employ an iterative series of tests to experimentally probe the complex dynamics exhibited by thixotropic materials. We use flow cessation tests to identify transient elastic stresses during stress jump tests. It is shown that the evolution of the elastic stress closely follows that of total stress in the series of stress jump tests, indicating that elasticity is a significant contributor to thixotropy. ",

author = "Jiho Choi and Matthew Armstrong and Rogers, {Simon A.}",

note = "Funding Information: This material is based upon work supported by the National Science Foundation under Grant No. 1847389. Publisher Copyright: {\textcopyright} 2021 Author(s).",

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The role of elasticity in thixotropy: Transient elastic stress during stepwise reduction in shear rate

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