A flexible rheometer design to measure the visco-elastic response of soft solids over a wide range of frequency

Etienne Rolley, Jacco H. Snoeijer, Bruno Andreotti

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We present a flexible setup for determining the rheology of visco-elastic materials which is based on the mechanical response of a magnet deposited at the surface of a slab of material and excited electromagnetically. An interferometric measurement of the magnet displacement allows one to reach an excellent accuracy over a wide range of frequency. Except for the magnet, there is no contact between the material under investigation and the apparatus. At low frequency, inertial effects are negligible so that the mechanical response, obtained through a lock-in amplifier, directly gives the material complex modulus. At high frequency, damped waves are emitted and the rheology must be extracted numerically from a theoretical model. To validate the design, the instrument was used to measure the rheology of a test polydimethylsiloxane gel which presents an almost perfect scale free response at high frequency.

Original languageEnglish
Article number023906
JournalReview of scientific instruments
Volume90
Issue number2
DOIs
Publication statusPublished - 1 Feb 2019

Fingerprint

rheometers
Rheometers
rheology
magnets
Rheology
Magnets
slabs
Polydimethylsiloxane
amplifiers
gels
low frequencies
Gels

Cite this

@article{2a919f6d39064a1fabf6974eb9de9232,
title = "A flexible rheometer design to measure the visco-elastic response of soft solids over a wide range of frequency",
abstract = "We present a flexible setup for determining the rheology of visco-elastic materials which is based on the mechanical response of a magnet deposited at the surface of a slab of material and excited electromagnetically. An interferometric measurement of the magnet displacement allows one to reach an excellent accuracy over a wide range of frequency. Except for the magnet, there is no contact between the material under investigation and the apparatus. At low frequency, inertial effects are negligible so that the mechanical response, obtained through a lock-in amplifier, directly gives the material complex modulus. At high frequency, damped waves are emitted and the rheology must be extracted numerically from a theoretical model. To validate the design, the instrument was used to measure the rheology of a test polydimethylsiloxane gel which presents an almost perfect scale free response at high frequency.",
author = "Etienne Rolley and Snoeijer, {Jacco H.} and Bruno Andreotti",
year = "2019",
month = "2",
day = "1",
doi = "10.1063/1.5064599",
language = "English",
volume = "90",
journal = "Review of scientific instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "2",

}

A flexible rheometer design to measure the visco-elastic response of soft solids over a wide range of frequency. / Rolley, Etienne; Snoeijer, Jacco H.; Andreotti, Bruno.

In: Review of scientific instruments, Vol. 90, No. 2, 023906, 01.02.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - A flexible rheometer design to measure the visco-elastic response of soft solids over a wide range of frequency

AU - Rolley, Etienne

AU - Snoeijer, Jacco H.

AU - Andreotti, Bruno

PY - 2019/2/1

Y1 - 2019/2/1

N2 - We present a flexible setup for determining the rheology of visco-elastic materials which is based on the mechanical response of a magnet deposited at the surface of a slab of material and excited electromagnetically. An interferometric measurement of the magnet displacement allows one to reach an excellent accuracy over a wide range of frequency. Except for the magnet, there is no contact between the material under investigation and the apparatus. At low frequency, inertial effects are negligible so that the mechanical response, obtained through a lock-in amplifier, directly gives the material complex modulus. At high frequency, damped waves are emitted and the rheology must be extracted numerically from a theoretical model. To validate the design, the instrument was used to measure the rheology of a test polydimethylsiloxane gel which presents an almost perfect scale free response at high frequency.

AB - We present a flexible setup for determining the rheology of visco-elastic materials which is based on the mechanical response of a magnet deposited at the surface of a slab of material and excited electromagnetically. An interferometric measurement of the magnet displacement allows one to reach an excellent accuracy over a wide range of frequency. Except for the magnet, there is no contact between the material under investigation and the apparatus. At low frequency, inertial effects are negligible so that the mechanical response, obtained through a lock-in amplifier, directly gives the material complex modulus. At high frequency, damped waves are emitted and the rheology must be extracted numerically from a theoretical model. To validate the design, the instrument was used to measure the rheology of a test polydimethylsiloxane gel which presents an almost perfect scale free response at high frequency.

UR - http://www.scopus.com/inward/record.url?scp=85061484097&partnerID=8YFLogxK

U2 - 10.1063/1.5064599

DO - 10.1063/1.5064599

M3 - Article

VL - 90

JO - Review of scientific instruments

JF - Review of scientific instruments

SN - 0034-6748

IS - 2

M1 - 023906

ER -