期刊
MECHANICS OF MATERIALS
卷 157, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mechmat.2021.103852
关键词
Indentation experiment; Skin; Mechanical properties; Mechanical parameters; Finite element
资金
- National Natural Science Foundation of China [11972248]
This study developed a hybrid experimental-numerical method to characterize the mechanical properties of human skin, including the dermis and subcutaneous tissue. Through an indentation experiment and finite element analysis, the three-dimensional mechanical properties of in vivo skin were successfully determined, demonstrating the effectiveness of this method.
Knowledge of the mechanical properties of human skin has essential applications in cosmetic, dermatology and surgical fields. In this study, a hybrid experimental?numerical method was developed to characterize the human skin mechanical properties in vivo. An indentation experiment was physically conducted and simulated by finite element (FE) analysis. In the physical experiment, an indenter made of transparent glass was adopted so that the elliptical eccentricity in the contact area between skin and indenter could be monitored in real-time. In FE simulation, the dermis and subcutaneous tissue were modeled as anisotropic hyperelastic material and isotropic elastic material, respectively. By fitting the FE results to the experimental data, the three-dimensional (3D) mechanical properties of skin, including the dermis and subcutaneous tissue were determined. Furthermore, to demonstrate the ineffectiveness of the hybrid experimental?numerical method, a sensitivity analysis was conducted. In this sensitivity analysis, it is shown that the different mechanical parameters have a different contribution to the final FE result. Finally, the effect of subcutaneous tissue for in vivo skin indentation measurement was also evaluated.
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