Determination of the Complex-Valued Elastic Moduli of Polymers by Electrical-Impedance Spectroscopy for Ultrasound Applications
(2022) In Physical Review Applied 18(6).- Abstract
A method is presented for the determination of complex-valued compression and shear elastic moduli of polymers for ultrasound applications. The resulting values, which are scarcely reported in the literature, are found with uncertainties typically around 1% (real part) and 6% (imaginary part). The method involves a setup consisting of a cm-radius, mm-thick polymer ring glued concentrically to a disk-shaped piezoelectric transducer. The ultrasound electrical-impedance spectrum of the transducer is computed numerically and fitted to measured values as an inverse problem in a wide frequency range, typically from 500 Hz to 5 MHz, both on and off resonance. The method is validated experimentally by ultrasonic through transmission around 1.9... (More)
A method is presented for the determination of complex-valued compression and shear elastic moduli of polymers for ultrasound applications. The resulting values, which are scarcely reported in the literature, are found with uncertainties typically around 1% (real part) and 6% (imaginary part). The method involves a setup consisting of a cm-radius, mm-thick polymer ring glued concentrically to a disk-shaped piezoelectric transducer. The ultrasound electrical-impedance spectrum of the transducer is computed numerically and fitted to measured values as an inverse problem in a wide frequency range, typically from 500 Hz to 5 MHz, both on and off resonance. The method is validated experimentally by ultrasonic through transmission around 1.9 MHz. The method is low cost, not limited to specific geometries and crystal symmetries, and, given the developed software, easy to execute. The method has no obvious frequency limitations before severe attenuation sets in above 100 MHz.
(Less)
- author
- Bodé, William N. ; Lickert, Fabian LU ; Augustsson, Per LU and Bruus, Henrik
- organization
- publishing date
- 2022-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Applied
- volume
- 18
- issue
- 6
- article number
- 064078
- publisher
- American Physical Society
- external identifiers
-
- scopus:85146118121
- ISSN
- 2331-7019
- DOI
- 10.1103/PhysRevApplied.18.064078
- language
- English
- LU publication?
- yes
- id
- fe82d597-1efb-423c-b5b4-d12fe6bd9b6a
- date added to LUP
- 2023-02-15 15:52:11
- date last changed
- 2023-11-21 16:27:04
@article{fe82d597-1efb-423c-b5b4-d12fe6bd9b6a,
abstract = {{<p>A method is presented for the determination of complex-valued compression and shear elastic moduli of polymers for ultrasound applications. The resulting values, which are scarcely reported in the literature, are found with uncertainties typically around 1% (real part) and 6% (imaginary part). The method involves a setup consisting of a cm-radius, mm-thick polymer ring glued concentrically to a disk-shaped piezoelectric transducer. The ultrasound electrical-impedance spectrum of the transducer is computed numerically and fitted to measured values as an inverse problem in a wide frequency range, typically from 500 Hz to 5 MHz, both on and off resonance. The method is validated experimentally by ultrasonic through transmission around 1.9 MHz. The method is low cost, not limited to specific geometries and crystal symmetries, and, given the developed software, easy to execute. The method has no obvious frequency limitations before severe attenuation sets in above 100 MHz.</p>}},
author = {{Bodé, William N. and Lickert, Fabian and Augustsson, Per and Bruus, Henrik}},
issn = {{2331-7019}},
language = {{eng}},
number = {{6}},
publisher = {{American Physical Society}},
series = {{Physical Review Applied}},
title = {{Determination of the Complex-Valued Elastic Moduli of Polymers by Electrical-Impedance Spectroscopy for Ultrasound Applications}},
url = {{http://dx.doi.org/10.1103/PhysRevApplied.18.064078}},
doi = {{10.1103/PhysRevApplied.18.064078}},
volume = {{18}},
year = {{2022}},
}