Friction mechanisms and abrasion of the human finger pad in contact with rough surfaces

Derler, S.; Preiswerk, M.; Rotaru, G.-M.; Kaiser, Jean‐Pierre; Rossi, René M.

doi:10.1016/j.triboint.2014.12.023

Cited by 29 publications

(20 citation statements)

References 32 publications

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“…Capillary adhesion, through the formation of fluid menisci between the contacting surfaces, may in some cases contribute to the overall adhesion [31]. Notable exceptions where friction mechanisms other than adhesion play a more significant additional role are when the skin is very wet with a fluid film on the surface, where hydrodynamic lubrication can occur [7,[32][33][34], and ridged-skin friction against very rough surfaces, where friction due to ploughing or deformation of the skin ridges by relatively hard roughness asperities can occur [35][36][37][38]. In the current work, there were no finger ridges present and the surface of the steel ring in contact with the human and synthetic skin was relatively smooth (R a 0.29 µm), so that the ploughing/deformation friction mechanism is unlikely to be significant.…”

Section: Effect Of Dry or Moist Skin Conditionsmentioning

confidence: 99%

Comparison of the Friction Behavior of Occluded Human Skin and Synthetic Skin in Dry and Moist Conditions

Franklin

Baranowska

Hendriks

et al. 2016

Tribology Transactions

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The goal of this work was to assess the suitability of a commercial synthetic skin to simulate occluded human skin friction behaviour in dry and moist skin conditions and under different applied surface pressures, with the view to using this material as a tribological test-bed for healthcare and personal care devices that are in direct contact with the skin during use. A flat rotating ring friction measurement device, in which one part of the skin surface is continuously covered (i.e. occluded), was used to compare the friction behaviour of human skin and the synthetic skin in controlled nominally dry and nominally moist skin conditions. Three loading levels were tested, simulating light, medium and high skin pressures typical of many lifestyleand personal health-related applications. The results showed that the friction behaviour of the synthetic skin tested here was notably different to that of human skin in vivo in terms of the effects of skin hydration, sliding time and applied surface pressure. It is concluded that, for use as a tribological test-bed, the tested synthetic skin model does not provide an acceptable alternative to in vivo tests using human skin.

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Section: Effect Of Dry or Moist Skin Conditionsmentioning

confidence: 99%

Comparison of the Friction Behavior of Occluded Human Skin and Synthetic Skin in Dry and Moist Conditions

Franklin

Baranowska

Hendriks

et al. 2016

Tribology Transactions

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“…where is the mean slope of the conical sliders with the interface [15]. The ploughing friction clearly depends on the slope of the hard sliders with the softer interface and it can be said that shaper the indenter higher is the deformation component of friction.…”

Section: Friction Mechanismsmentioning

confidence: 99%

“…Inherent skin related phenomena like occlusion, sweating and the sensitivity of coefficient of friction to these conditions were well investigated [9,10]. More recently, Derler et al identified ploughing and abrasion as important friction mechanisms during repetitive rubbing of fingerpad on abrasive surfaces [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of friction mechanisms in finger pad sliding against surfaces of varying roughness

Chimata

Schwartz

2015

Biotribology

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Human finger pad friction and the effects of surface features on the fingerprint ridges, shape of the finger and the material properties of the finger were investigated. The friction coefficients for three fine-grit abrasive papers were measured to assess these effects. Four probing surfaces were used: human index finger pad, silicone replicas of the finger with and without fingerprints, and a smooth silicone sphere. Friction tests were performed at a constant normal load of 0.5 N in two probe orientations: normal and perpendicular to the orientation of the fingerprint ridges. Scanning electron microscopy of the abrasive papers was performed to examine their surface topography. Based on the trends in coefficients of friction, topography of the abrasive papers, surface features of the finger pad, and the shape and elastic properties of the finger, possible friction mechanisms were discussed. It was inferred that the change in the shape of the probe (from a sphere to the finger shape) changes the adhesion and deformation components of friction, the presence of fingerprints adds an interlocking contribution to the friction and decrease the adhesion and deformation components of friction, and the elastic properties of the finger lead to an increase in all the three components of friction.Keywords skin tribology, finger pad friction, friction mechanisms, fingerprints, tactility, haptics Disciplines Applied Mechanics | Other Mechanical Engineering | TribologyComments NOTICE: this is the author's version of a work that was accepted for publication in Biotribiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Biotribiology, vol. 3 (2015) NOTICE: this is the author's version of a work that was accepted for publication in Biotribiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document.Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Biotribiology, vol. 3 (2015) AbstractHuman finger pad friction and the effects of surface features on the fingerprint ridges, shape of the finger and the material properties of the finger were investigated. The friction coefficients for three fine-grit abrasive papers were measured to assess these effects. Four probing surfaces were used:human index finger pad, silicone replicas of the finger with and without fingerprints, and a smooth silicone sphere. Friction tests were performed at a constant normal load of 0.5 N in two probe orientations: normal and perpendicular to the orientation of the fingerprint ridges. Scanning electron microscopy of the abrasive papers was performed to examine thei...

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“…For finger pad testing variations in contact area also result from the fact people all have different ridge patterns [9]. The ridges also lead to a further friction mechanism occurring as the ridges interact with surface texture features, known as "interlocking" [10][11][12][13]. The changes in skin elasticity mainly result from variability in skin structure (Liu et al, 2015) [14] and different moisture levels [15,16].…”

Section: Introductionmentioning

confidence: 99%

A comparison of friction behaviour for ex vivo human, tissue engineered and synthetic skin

Bostan

Taylor

Carré

et al. 2016

Tribology International

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Friction mechanisms and abrasion of the human finger pad in contact with rough surfaces

Cited by 29 publications

References 32 publications

Comparison of the Friction Behavior of Occluded Human Skin and Synthetic Skin in Dry and Moist Conditions

Comparison of the Friction Behavior of Occluded Human Skin and Synthetic Skin in Dry and Moist Conditions

Investigation of friction mechanisms in finger pad sliding against surfaces of varying roughness

A comparison of friction behaviour for ex vivo human, tissue engineered and synthetic skin

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