A Finite element fingertip model for simulating tactile sensation

Fei Shao
Poster
Last modified: 2008-05-13

Abstract


The analysis of the mechanics of the contact interactions of fingertips/textured surfaces and the stress/strain distributions in the skin of the fingertip is essential to understand and then manufacture surface texture for specific tactile affects. Solid mechanics models may help explain how skin microstructure, in particular the epidermal ridges, influences fingertip mechanoreceptors’ sensitivity to a textured surface. In the present study, a two-dimensional (2D) finite element (FE) model of a fingertip is proposed to simulate the responses of a fingertip when it is statically loaded or move over a textured surface. Results shows that the epidermal ridges have little effect on stress/strain distribution within the fingertip in static loading and increase the vibration significantly when a fingertip slides over a textured surface. The friction force fluctuations during the sliding of the fingertip model with epidermal ridges are four times greater than for the model without epidermal ridges. This initial study demonstrates that skin microstructure may aid tactile perception.

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