Volume-controlled cavity expansion for probing of local elastic properties in soft materials
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c8sm02142b.pdf
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5.79 MB
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Author(s)
Raayai Ardakani, Shabnam
Chen, Zhantao
Earl, Darla
Cohen, Tal
Date Issued
December 2018
Journal
Soft Matter
Publisher
Royal Society of Chemistry
Citation
Raayai-Ardakani, Shabnam et al. “Volume-Controlled Cavity Expansion for Probing of Local Elastic Properties in Soft Materials.” Soft Matter 15, 3 (2019): 381–392 © 2019 The Royal Society of Chemistry
Version
Final published version
Abstract
Cavity expansion can be used to measure the local nonlinear elastic properties in soft materials, regardless of the specific damage or instability mechanism that it may ultimately induce. To that end, we introduce a volume-controlled cavity expansion procedure and an accompanying method that builds on the Cavitation Rheology technique [J. A. Zimberlin et al., Soft Matter, 2007, 3, 763-767], but without relying on the maximum recorded pressure. This is achieved by determining an effective radius of the cavity that is based on the volume measurements, and is further supported by numerical simulations. Applying this method to PDMS samples, we show that it consistently collapses the experimental curves to the theoretical prediction of cavity expansion prior to the occurrence of fracture or cavitation, thus resulting in high precision measurement with less than 5% of scatter and good agreement with results obtained via conventional techniques. Moreover, since it does not require visual tracking of the cavity, this technique can be applied to measure the nonlinear elastic response in opaque samples.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution Noncommercial 3.0 unported license
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DOI of Published Version
https://doi.org/10.1039/c8sm02142b
