Acoustic cavitation rheometry. Issue 10 (15th February 2021)
- Record Type:
- Journal Article
- Title:
- Acoustic cavitation rheometry. Issue 10 (15th February 2021)
- Main Title:
- Acoustic cavitation rheometry
- Authors:
- Mancia, Lauren
Yang, Jin
Spratt, Jean-Sebastien
Sukovich, Jonathan R.
Xu, Zhen
Colonius, Tim
Franck, Christian
Johnsen, Eric - Abstract:
- Abstract : Acoustic cavitation generated via high-amplitude ultrasound is used to characterize the high strain-rate mechanical properties of agarose hydrogels. Abstract : Characterization of soft materials is challenging due to their high compliance and the strain-rate dependence of their mechanical properties. The inertial microcavitation-based high strain-rate rheometry (IMR) method [Estrada et al., J. Mech. Phys. Solids, 2018, 112, 291–317] combines laser-induced cavitation measurements with a model for the bubble dynamics to measure local properties of polyacrylamide hydrogel under high strain-rates from 10 3 to 10 8 s −1 . While promising, laser-induced cavitation involves plasma formation and optical breakdown during nucleation, a process that could alter local material properties before measurements are obtained. In the present study, we extend the IMR method to another means to generate cavitation, namely high-amplitude focused ultrasound, and apply the resulting acoustic-cavitation-based IMR to characterize the mechanical properties of agarose hydrogels. Material properties including viscosity, elastic constants, and a stress-free bubble radius are inferred from bubble radius histories in 0.3% and 1% agarose gels. An ensemble-based data assimilation is used to further help interpret the obtained estimates. The resulting parameter distributions are consistent with available measurements of agarose gel properties and with expected trends related to gel concentrationAbstract : Acoustic cavitation generated via high-amplitude ultrasound is used to characterize the high strain-rate mechanical properties of agarose hydrogels. Abstract : Characterization of soft materials is challenging due to their high compliance and the strain-rate dependence of their mechanical properties. The inertial microcavitation-based high strain-rate rheometry (IMR) method [Estrada et al., J. Mech. Phys. Solids, 2018, 112, 291–317] combines laser-induced cavitation measurements with a model for the bubble dynamics to measure local properties of polyacrylamide hydrogel under high strain-rates from 10 3 to 10 8 s −1 . While promising, laser-induced cavitation involves plasma formation and optical breakdown during nucleation, a process that could alter local material properties before measurements are obtained. In the present study, we extend the IMR method to another means to generate cavitation, namely high-amplitude focused ultrasound, and apply the resulting acoustic-cavitation-based IMR to characterize the mechanical properties of agarose hydrogels. Material properties including viscosity, elastic constants, and a stress-free bubble radius are inferred from bubble radius histories in 0.3% and 1% agarose gels. An ensemble-based data assimilation is used to further help interpret the obtained estimates. The resulting parameter distributions are consistent with available measurements of agarose gel properties and with expected trends related to gel concentration and high strain-rate loading. Our findings demonstrate the utility of applying IMR and data assimilation methods with single-bubble acoustic cavitation data for measurement of viscoelastic properties. … (more)
- Is Part Of:
- Soft matter. Volume 17:Issue 10(2021)
- Journal:
- Soft matter
- Issue:
- Volume 17:Issue 10(2021)
- Issue Display:
- Volume 17, Issue 10 (2021)
- Year:
- 2021
- Volume:
- 17
- Issue:
- 10
- Issue Sort Value:
- 2021-0017-0010-0000
- Page Start:
- 2931
- Page End:
- 2941
- Publication Date:
- 2021-02-15
- Subjects:
- Soft condensed matter -- Periodicals
530.413 - Journal URLs:
- http://www.rsc.org/Publishing/Journals/sm/index.asp ↗
http://www.rsc.org/ ↗ - DOI:
- 10.1039/d0sm02086a ↗
- Languages:
- English
- ISSNs:
- 1744-683X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 8321.419000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 16019.xml