Influence of variations in the pressure distribution on the friction of the finger pad

Derler, S.; Suess, Juergen; Rao, A.C.; Rotaru, G.-M.

doi:10.1016/j.triboint.2012.03.001

Cited by 27 publications

(35 citation statements)

References 21 publications

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“…It means that the more the contact area size, the more precisely the contact pressure evaluation in the sliding layer. This fact following from the approximate solution is in agreement with the results of the exact solution and findings [61,75,76].…”

Section: Discussion and Analysis Resultssupporting

confidence: 91%

“…This means that geometry, physical properties, and wear behaviour of this dynamic system are the probability values. The pressure and temperature play an important role among these factors [18][19][20][21]. It arises from the media properties which depend on the velocity of the particle in the surrounding (gas or lubricant) and therefore the dissipation of heat away from the area [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Effect of pressure changes in sliding contact

Deeva¹,

Slobodyan²

2018

IJET

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The sliding contact when the air together with wear particles flow in contact area between commutator and brush is considered. The dynamical interaction between two surfaces is probabilistic. The behaviour of space-time-varying process is described by the differential equations, which are generally very difficult to solve. The simple numerical solution applying the method of Galerkin approximation to estimate the change in the pressure field in thin contact layer is obtained. It was found that under the leading edge of the brush the pressure change doesn't exceed 0.07 of the maximum value. The numerical simulations of the absolute error are presented for the 0.1, 0.2, 0.5, and 1 of the relative length. The relative error of pressure changes for small contact area is smaller (1 -0.8e 0.1τ). It is concluded that the approximate solution tends to the exact one. Moreover, it is shown that as the sliding velocity decreases, the relative error of the pressure change tends to the zero.

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Section: Discussion and Analysis Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effect of pressure changes in sliding contact

Deeva¹,

Slobodyan²

2018

IJET

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“…As the result, the contact area of each textured samples need to be calculated (refer to Eqs. 10,11,12). According to Eq.…”

Section: The Geometric Effect Of the Contact Areamentioning

confidence: 99%

“…According to Eq. (3), the functional forms of COF between the skin and textured counter-surface can be calculated by inputting the values of the intrinsic interfacial shear strength s 0 and the pressure coefficient a which are reported in the literature as 5.5 kPa and 0.23 accordingly (refer to Table 3; [10,33]). The normal loads (F N ) were 0.2 N, 0.4 N, 0.6 N, 0.8 N, and 1.0 N, and the results of estimated COF were charted.…”

Section: The Geometric Effect Of the Contact Areamentioning

confidence: 99%

Texture Design for Reducing Tactile Friction Independent of Sliding Orientation on Stainless Steel Sheet

et al. 2017

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Surface texture is important for contact mechanical and tribological phenomena such as the contact area and friction. In this research, three different types of geometrical microstructures were designed and fabricated by pulsed laser surface texturing as semi-symmetric (grooved channel), asymmetric fractal (Hilbert curve), and symmetric patterns (grid). A conventionally finished surface as a reference sample from the same stainless steel sheet material was compared. From the experimental approach, a multiaxis force/torque transducer was used to investigate the functionality of surface texture based on measuring the tactile friction in three different sliding directions: perpendicular, parallel, and 45°to the textures. According to the dynamic friction measurements, the grid texture was indeed orientation independent. The other samples showed orientation-dependent frictional behavior, especially the grooved channel texture and reference sample. Furthermore, an analytical approach was applied to estimate the values of the friction coefficient by the pressure distribution method. From both the experimental and analytical approaches, the grid pattern was validated to be the optimal texture design in the concern of friction reduction and orientation-independent behavior.

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“…Especially, previous research intensively studied the roles of frictional vibration in the textural perception of materials when a finger is slid over a material surface [1][2][3][4][5][6]. For example, Fagiani [1] investigated the spectra of frictional vibrations where a finer surface roughness and higher sliding velocity led to higher frequency components in the spectra.…”

Section: Introductionmentioning

confidence: 99%

Friction perception resulting from laterally vibrotactile stimuli

2017

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When a human rubs a contactor that is vibrating laterally at 3-10 Hz with an amplitude of ~1 mm, the friction is perceived as being greater than that sensed when touching a stationary contactor. This phenomenon could be exploited for a new vibrotactile approach to friction perception; however, the principles behind it have yet to be explained. In this study, we hypothesized that the perceived friction increases because of the Stribeck characteristic and stick-slip phenomenon of friction, whereby the friction varies depending on the relative velocity between a subject's fingertip and contactor. The relative velocity instantaneously decreases because of the lateral vibration of the contactor, while the friction rises during the same period. To test this hypothesis, we simulated the friction forces between a fingertip and a vibrating contactor. Furthermore, we performed psychophysical experiments using five participants, in which each explored a vibrating contactor and subjectively compared the perceived friction under several stimulus conditions. The simulated friction forces, the results of the psychophysical experiments, and physical observation suggested that the transient increases in friction caused by lateral vibration of the contactor influenced friction perception for a laterally vibrating contactor.

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Influence of variations in the pressure distribution on the friction of the finger pad

Cited by 27 publications

References 21 publications

Effect of pressure changes in sliding contact

Effect of pressure changes in sliding contact

Texture Design for Reducing Tactile Friction Independent of Sliding Orientation on Stainless Steel Sheet

Friction perception resulting from laterally vibrotactile stimuli

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