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A theory of mechanobiological sensation: strain amplification/attenuation of coated liquid inclusion with surface tension

A theory of mechanobiological sensation: strain amplification/attenuation of coated liquid... Cells are compressible and can be regarded as a kind of coated liquid inclusion embedded in a three-dimensional elastic matrix. In the presence of far-field loading, how the coating influences the mechanical response (e.g., volume change) of the liquid inclusion remains elusive, especially when surface tension effects become significant at cell size level. We developed a theoretical model to characterize the mechanical amplification or attenuation role of coating on spherical liquid inclusions, with surface tension and liquid compressibility accounted for. We found that surface tension could increase the volumetric strain of the inclusion through decreasing its effective bulk modulus. We further found that, when there is a monotonic stiffness variation (either decreasing or increasing) from matrix via coating to inclusion, the presence of coating amplified the volumetric strain compared with the case without coating; in the opposite, when there is a non-monotonic stiffness change from matrix via coating to inclusion, the volumetric strain is attenuated by the coating. The results are useful for understanding and exploring the mechanobiological sensation of certain types of cell, e.g., osteocytes and cancer cells.Graphic Abstract[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Mechanica Sinica" Springer Journals

A theory of mechanobiological sensation: strain amplification/attenuation of coated liquid inclusion with surface tension

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References (67)

Publisher
Springer Journals
Copyright
Copyright © The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH Germany, part of Springer Nature 2021
ISSN
0567-7718
eISSN
1614-3116
DOI
10.1007/s10409-020-01017-3
Publisher site
See Article on Publisher Site

Abstract

Cells are compressible and can be regarded as a kind of coated liquid inclusion embedded in a three-dimensional elastic matrix. In the presence of far-field loading, how the coating influences the mechanical response (e.g., volume change) of the liquid inclusion remains elusive, especially when surface tension effects become significant at cell size level. We developed a theoretical model to characterize the mechanical amplification or attenuation role of coating on spherical liquid inclusions, with surface tension and liquid compressibility accounted for. We found that surface tension could increase the volumetric strain of the inclusion through decreasing its effective bulk modulus. We further found that, when there is a monotonic stiffness variation (either decreasing or increasing) from matrix via coating to inclusion, the presence of coating amplified the volumetric strain compared with the case without coating; in the opposite, when there is a non-monotonic stiffness change from matrix via coating to inclusion, the volumetric strain is attenuated by the coating. The results are useful for understanding and exploring the mechanobiological sensation of certain types of cell, e.g., osteocytes and cancer cells.Graphic Abstract[graphic not available: see fulltext]

Journal

"Acta Mechanica Sinica"Springer Journals

Published: Jan 7, 2021

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