Computational Models for the Determination of Depth-Dependent Mechanical Properties of Skin with a Soft, Flexible Measurement Device

Yuan, J.*, Dagdeviren, C.*, Shi, Y., Ma, Y., Feng, X., Rogers, J.A., Huang, Y., Proceedings of the Royal Society A – Mathematical, Physical and Engineering Sciences, 472:20160225, 2016.


Conformal modulus sensors (CMS) incorporate PZT nanoribbons as mechanical actuators and sensors to achieve reversible conformal contact with the human skin for non-invasive, in vivo measurements of skin modulus. An analytic model presented in this paper yields expressions that connect the sensor output voltage to the Young moduli of the epidermis and dermis, the thickness of the epidermis, as well as the material and geometrical parameters of the CMS device itself and its encapsulation layer. Results from the model agree well with in vitro experiments on bilayer structures of poly(dimethylsiloxane). 

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