Friction and tactile perception of textile fabrics

Ramalho, A.; Szekeres, Péter; Fernandes, Eliana

doi:10.1016/j.triboint.2012.08.018

Cited by 59 publications

(50 citation statements)

References 8 publications

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“…Hence, there were a total of nine rendering conditions (f v = 10, 40, 70 mm/s) and V amp = (0.6, 0.9 and 1.2 µm). The values selected for f v are in line with the values reported in earlier tactile exploration studies [5], [22], [29], [35], [36]. In the second experiment (Exp − 2), f v was kept constant at 40 mm/s while t amp r and V amp were varied.…”

Section: Intensity Scaling Experimentssupporting

confidence: 53%

Tactile Perception of Virtual Edges and Gratings Displayed by Friction Modulation via Ultrasonic Actuation

Saleem

Yılmaz

Başdoğan

2020

IEEE Trans. Haptics

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To render tactile cues on a touchscreen by friction modulation, it is important to understand how human perceive a change in friction. In this study, we investigate the relations between perceived change in friction on an ultrasonically actuated touchscreen and parameters involved in contact between finger and its surface. We first estimate the perceptual thresholds to detect rising and falling friction while finger is sliding on the touch surface. Then, we conduct intensity scaling experiments and investigate the effect of finger sliding velocity, normal force, and rise/fall time of vibration amplitude (transition time) on the perceived intensity of change in friction. In order to better understand the role of contact mechanics, we also look into the correlations between the perceived intensities of subjects and several parameters involved in contact. The results of our experiments show that the contrast and rate of change in tangential force were best correlated with the perceived intensity. The subjects perceived rising friction more strongly than falling friction, particularly at higher tangential force contrast. We argue that this is due to hysteresis and viscoelastic behavior of fingertip under tangential loading. The results also showed that transition time and normal force have significant effect on our tactile perception.

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Section: Intensity Scaling Experimentssupporting

confidence: 53%

Tactile Perception of Virtual Edges and Gratings Displayed by Friction Modulation via Ultrasonic Actuation

Saleem

Yılmaz

Başdoğan

2020

IEEE Trans. Haptics

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“…The samples were thus ordered into modal/polyamide > cotton > jute, with jute being judged as the worst haptic feeling. Measuring bending stiffness and the coefficient of friction did not discriminate the knitwear, although similar to our findings, Ramalho et al already showed, that polyamide resulted in the lowest values of friction except for women's palm, closely followed by cotton (4). Other studies tried to compare friction with tactile feelings and found a positive correlation although only for haptic finger touching (11).…”

Section: Discussionsupporting

confidence: 77%

Electroencephalographic study showing that tactile stimulation by fabrics of different qualities elicit graded event‐related potentials

Hoefer

Handel

Müller³

et al. 2016

Skin Research and Technology

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“…The results reveal that the friction behavior also depends on the anatomical site. Another study performed by Ramalho et al [22] in order to assess the coefficient of friction between human skin sliding against different types of fabric shows that wool produces the highest COF in both men and women, while polyamide-based fabric produced the lowest values of COF, as can be seen in Figure 2. In this study performed by Ramalho et al [22], the friction was measured on the ventral forearm of each volunteer.…”

Section: Introductionmentioning

confidence: 92%

Friction of Human Skin against Different Fabrics for Medical Use

Vilhena

Ramalho

2016

Lubricants

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Knowledge of the tribology of human skin is essential to improve and optimize surfaces and materials in contact with the skin. Besides that, friction between the human skin and textiles is a critical factor in the formation of skin injuries, which are caused if the loads and shear forces are high enough and/or over long periods of time. This factor is of particular importance in bedridden patients, since they are not moving about or are confined to wheelchairs. Decubitus ulcers are one of the most frequently-reported iatrogenic injuries in developed countries. The risk of developing decubitus ulcers can be predicted by using the "Braden Scale for Predicting Pressure Ulcer Risk" that was developed in 1987 and contains six areas of risk (cognitive-perceptual, immobility, inactivity, moisture, nutrition, friction/shear), although there are limitations to the use of such tools. The coefficient of friction of textiles against skin is mainly influenced by: the nature of the textile, skin moisture content and ambient humidity. This study will investigate how skin friction (different anatomical regions) varies, rubbing against different types of contacting materials (i.e., fabrics for medical use) under different contact conditions and their relationship in the formation and prevention of decubitus ulcers.

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Friction and tactile perception of textile fabrics

Cited by 59 publications

References 8 publications

Tactile Perception of Virtual Edges and Gratings Displayed by Friction Modulation via Ultrasonic Actuation

Tactile Perception of Virtual Edges and Gratings Displayed by Friction Modulation via Ultrasonic Actuation

Electroencephalographic study showing that tactile stimulation by fabrics of different qualities elicit graded event‐related potentials

Friction of Human Skin against Different Fabrics for Medical Use

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