Complexity, rate, and scale in sliding friction dynamics between a finger and textured surface.

ABSTRACT: Sliding friction between the skin and a touched surface is highly complex, but lies at the heart of our ability to discriminate surface texture through touch. Prior research has elucidated neural mechanisms of tactile texture perception, but our understanding of the nonlinear dynamics of frictional sliding between the finger and textured surfaces, with which the neural signals that encode texture originate, is incomplete. To address this, we compared measurements from human fingertips sliding against textured counter surfaces with predictions of numerical simulations of a model finger that resembled a real finger, with similar geometry, tissue heterogeneity, hyperelasticity, and interfacial adhesion. Modeled and measured forces exhibited similar complex, nonlinear sliding friction dynamics

SUBMITTER: Khojasteh B 

PROVIDER: S-EPMC6135846 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature