Acousto-mechanical behaviour of ex-vivo skin: Nonlinear and viscoelastic properties

Halima Ghorbel-Feki; Ali Masood; Michael Caliez; Michael Gratton; Jean Christophe Pittet; Martin Lints; Serge Dos Santos

doi:10.1016/j.crme.2018.12.005

Acousto-mechanical behaviour of ex-vivo skin: Nonlinear and viscoelastic properties

Halima Ghorbel-Feki ^1,^2,³; Ali Masood ^1,^2,³; Michael Caliez ^1,²; Michael Gratton ^1,²; Jean Christophe Pittet ³; Martin Lints ^1,²; Serge Dos Santos ^1,²

¹ INSA Centre Val de Loire, 3, rue de la Chocolaterie, CS 23410, 41034 Blois cedex, France
² UMR 1253, Imaging and Brain: iBrain, Université de Tours, INSERM, Tours, France
³ Orion Concept, 113, rue des Bordiers, 37100 Tours, France

Comptes Rendus. Mécanique, Volume 347 (2019) no. 3, pp. 218-227.

Abstract

The mechanical behaviour of skin is significant for some applications including dermatology, surgery, and impact biomechanics science. In this work, we have investigated the study of the acousto-mechanical viscoelastic properties of skin. For that, both tensile-relaxation and ultrasonic tests were conducted on porcine tissue samples in fibre directions. To understand the complex skin aging phenomena, we used strength tensile test correlated with the Nonlinear Time Reversal signal processing tool extension “TR-NEWS”. Uniaxial tensile tests were carried out at a strain rate of $5 \cdot 10^{- 3} mm s^{- 1}$ on skin using a load-relaxation-discharge load path with increasing amplitude and offset. This work is also under way to extend the frequency range of ultrasounds to 50 MHz. Digital Image Correlation was used for 2D strain measurement of the dermis. From this analysis, we conclude that fresh porcine skin should be modelled as a nonlinear viscoelastic material with strain-rate dependence. The obtained hysteresis loop shall be taken as significant skin damage.

Received: 2018-10-15
Accepted: 2018-12-20
Published online: 2019-02-01

DOI: 10.1016/j.crme.2018.12.005

Keywords: Skin, Strength tensile test, TR-NEWS measurements, Hysteresis, Nonlinearity, Viscoelasticity

Author's affiliations:

Halima Ghorbel-Feki ^{1, 2, 3}; Ali Masood ^{1, 2, 3}; Michael Caliez ^{1, 2}; Michael Gratton ^{1, 2}; Jean Christophe Pittet ³; Martin Lints ^{1, 2}; Serge Dos Santos ^{1, 2}

¹ INSA Centre Val de Loire, 3, rue de la Chocolaterie, CS 23410, 41034 Blois cedex, France
² UMR 1253, Imaging and Brain: iBrain, Université de Tours, INSERM, Tours, France
³ Orion Concept, 113, rue des Bordiers, 37100 Tours, France

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     author = {Halima Ghorbel-Feki and Ali Masood and Michael Caliez and Michael Gratton and Jean Christophe Pittet and Martin Lints and Serge Dos Santos},
     title = {Acousto-mechanical behaviour of ex-vivo skin: {Nonlinear} and viscoelastic properties},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {218--227},
     publisher = {Elsevier},
     volume = {347},
     number = {3},
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     doi = {10.1016/j.crme.2018.12.005},
     language = {en},
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%A Michael Gratton
%A Jean Christophe Pittet
%A Martin Lints
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%T Acousto-mechanical behaviour of ex-vivo skin: Nonlinear and viscoelastic properties
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Halima Ghorbel-Feki; Ali Masood; Michael Caliez; Michael Gratton; Jean Christophe Pittet; Martin Lints; Serge Dos Santos. Acousto-mechanical behaviour of ex-vivo skin: Nonlinear and viscoelastic properties. Comptes Rendus. Mécanique, Volume 347 (2019) no. 3, pp. 218-227. doi : 10.1016/j.crme.2018.12.005. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2018.12.005/

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