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Acoustic cavitation rheometry

Mancia, Lauren and Yang, Jin and Spratt, Jean-Sebastien and Sukovich, Jonathan R. and Xu, Zhen and Colonius, Tim and Franck, Christian and Johnsen, Eric (2021) Acoustic cavitation rheometry. Soft Matter, 17 (10). pp. 2931-2941. ISSN 1744-683X. doi:10.1039/d0sm02086a.

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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 10³ to 10⁸ 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Mancia, Lauren0000-0003-4366-1944
Sukovich, Jonathan R.0000-0002-5650-991X
Colonius, Tim0000-0003-0326-3909
Franck, Christian0000-0002-2347-620X
Johnsen, Eric0000-0001-9530-408X
Additional Information:© 2021 The Royal Society of Chemistry. Submitted 22 Nov 2020; Accepted 04 Feb 2021; First published 05 Feb 2021. This work was supported by ONR Grant No. N00014-18-1-2625 (under Dr Timothy Bentley). There are no conflicts to declare.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-18-1-2625
Issue or Number:10
Record Number:CaltechAUTHORS:20210122-092028610
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Official Citation:Acoustic cavitation rheometry. Soft Matter, 2021, 17, 2931-2941; DOI: 10.1039/d0sm02086a
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107657
Deposited By: George Porter
Deposited On:22 Jan 2021 20:06
Last Modified:16 Nov 2021 19:05

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