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Linear shear response of the upper skin layers
- Source :
- Biorheology, 48(3-4), 229-245. IOS Press
- Publication Year :
- 2011
- Publisher :
- IOS Press, 2011.
-
Abstract
- This study presents an in vitro experimental method to determine shear properties of the epidermis. Shear tests were performed with a parallel plate rheometer on samples of stratum corneum and the viable epidermis. The method was validated on very thin silicon sheets. Preliminary test were performed to determine the linear viscoelastic range, the effect of normal loading on the sample and the time to reach equilibrium after changes of temperature and relative humidity. The study shows that reproducible results can be obtained for the shear properties of epidermis in an in vitro set up. The dynamic shear modulus for stratum corneum roughly ranges from 4 to 12 kPa, decreasing with increasing relative humidity. The values are considerably lower than the shear modulus value based on tensile Young’s moduli in literature, indicating a considerable anisotropic material behavior. Results for the epidermis were of the same order of magnitude, but were less consistent possibly due to a less well-defined tissue composition.
- Subjects :
- Adult
Male
Materials science
Physiology
Rheometer
Middle Aged
Models, Biological
Viscoelasticity
Elasticity
Biomechanical Phenomena
Shear modulus
medicine.anatomical_structure
Shear (geology)
Physiology (medical)
Ultimate tensile strength
Stratum corneum
medicine
Humans
Relative humidity
Stress, Mechanical
Composite material
Epidermis
Anisotropy
Shear Strength
Subjects
Details
- Language :
- English
- ISSN :
- 0006355X
- Volume :
- 48
- Issue :
- 3-4
- Database :
- OpenAIRE
- Journal :
- Biorheology
- Accession number :
- edsair.doi.dedup.....f1971eb8fec8bbd8884286586002fc38