| Issue |
4open
Volume 6, 2023
Special issue on GDR Cosm’actifs
|
|
|---|---|---|
| Article Number | 7 | |
| Number of page(s) | 12 | |
| Section | Physics - Applied Physics | |
| DOI | https://doi.org/10.1051/fopen/2023006 | |
| Published online | 13 June 2023 | |
Research Article
Dwell time in contact-free creep tests plays an age-dependent role in the viscoelastic behavior of in vivo human skin
Université de Lyon, ECL-ENISE – Laboratoire de Tribologie et Dynamique des Systèmes (LTDS) – UMR 5513 CNRS, 58 rue Jean Parot, 42023 Saint-Etienne, France
* Corresponding author: marie-angele.abellan@enise.fr
Received:
20
June
2022
Accepted:
10
May
2023
The experimental characterization of human skin in vivo may be highly dependent on the experimental protocol and on the procedure employed for analyzing the experimental data. One way of overcoming these drawbacks is the contact-free indenter at the Laboratoire de Tribologie et Dynamique des Systèmes, Lyon, France. However, it is still necessary to determine the possible influence of the experimental protocol in terms of the dwell time chosen. This paper describes a coupled theoretical/experimental/numerical study on the viscoelastic responses of the human skin at two different ages during contact-free creep tests with dwell times of 0.1 s, 0.5 s, 1 s, 2 s and 100 s, respectively. The 3-D finite element simulations are conducted with the SYSTUS® software. The numerical results point to different behaviors for the young and elderly subjects. The young subject does not appear influenced by dwell times during the numerical creep tests. On the contrary, the response of the elderly subject is highly dependent on dwell time.
Key words: Human skin in vivo / Contact-free indenter / Numerical simulation / Viscoelastic parameters / Large displacements / Non-linear analysis
© M. Abellan et al., Published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.