Study on the Friction of Bored Cylindrical Rubber Protrusions Sliding on Ceramic

Author

Production Engineering and Mechanical Design Department, Faculty of Engineering, Minia University, El-Minia, Egypt

Abstract

The present work aims at reducing the friction of rubber soles sliding on ceramic floorings. Fitting bored cylindrical protrusions with different diameters on rubber soles was proposed. Experiments were carried out to evaluate the performance of the proposed protrusions in increasing friction coefficient at dry and contaminated floorings. It was found that, at dry sliding, friction coefficient significantly increased up to maximum then decreased with increasing the number of holes. The highest friction values were observed for 1.5 mm diameter holes, while the lowest values were displayed by 3.0 mm diameter holes. In the presence of water on the flooring, it was shown that as the hole diameter increased, the volume of the water leaked out the contact area increased. The detergent layer formed on the contact area caused drastic friction decrease. The highest friction value did not exceed 0.13 which confirmed the severity of walking in the presence of detergent. When sand particles covered the sliding surfaces, the effect of hole diameter was much less than the number of holes. When oil contaminated the sliding surfaces, friction coefficient significantly increased at single hole protrusion. The effect of single hole was more pronounced than the effect of hole diameter due to the strong adhesion of oil into the rubber and ceramic surfaces. Water/oil contaminated ceramic flooring showed the highest friction coefficient (0.26) at single hole of 1.5 mm diameter. Further increase in the number of holes decreased friction values. Presence of sand in oil contaminated ceramic flooring did not increase the friction coefficient, where the highest value did not exceed 0.2. Sliding against water/oil dilution and sand contaminated ceramic flooring represented relatively higher friction values. Protrusions perforated by three holes of 2.5 mm diameter showed the highest friction followed by single hole of 3.0 mm diameter and four holes of 1.5 mm diameter.

Keywords

References

1.     Mohamed El-Minia, M., Mahmoud, M. and Ali, W., "Frictional behaviour of the cylind-rical protrusions and holes in rub-ber surfaces sliding on ceramics", KGK. Kautschuk, Gummi, Kunststoffe,  Vol. 65, No. 11-12, (2012), 37-40.
2.     M., S.A., I., K.M. and Y., A.W., "Friction coefficient of grooved rubber disc sliding against ceramics: I. Effect of motion direction", Journal of the Egyptian Society of Tribology,  Vol. 11, No. 2, (2014), 1 - 20.
3.     M., S.A., I., K.M. and Y., A.W., "Friction coefficient of grooved rubber disc sliding against ceramics: Ii. Effect of load", Journal of the Egyptian Society of Tribology,  Vol. 11, No. 2, (2014), 21 - 38.
4.     M., S.A., I., K.M. and Y., A.W., "Friction coefficient of grooved rubber disc sliding against ceramics: Iii. Effect of the grooves", Journal of the Egyptian Society of Tribology,  Vol. 11, No. 3, (2014), 1 - 19.
5.     T., H.A., "Influence of tread groove width of rubber on friction coefficient", Journal of the Egyptian Society of Tribology,  Vol. 11, No. 4, (2014), 46 - 57.
6.     M., E.-S.Y., A., R.M. and Ali W. Y., "Frictional behaviour of rubber flooring mat fitted by rectangular treads", EGTRIB,  Vol. 11, No. 2, (2014), 39 - 52.
7.     Maeda, K., Bismarck, A. and Briscoe, B., "Effect of bulk deformation on rubber adhesion", Wear,  Vol. 263, No. 7, (2007), 1016-1022.
8.     Samy, A., Mahmoud, M., Khashaba, M. and Ali, W., "Friction of rubber sliding against ceramics part i dry and water lubricated conditions", KGK. Kautschuk, Gummi, Kunststoffe,  Vol. 60, No. 6, (2007), 322-327.
9.     M., S.A., M., M.M., I., K.M. and Y., A.W., "Friction of rubber sliding against ceramics, ii. Oil and oil diluted by water lubricated conditions", KGK 60,  Vol. 693 - 696, (2007).
10.   Samy, A., Mahmoud, M., Khashaba, M. and Ali, W., "Friction of rubber sliding against ceramics, iii. Sand contaminating the lubricating fluids", KGK Kautschuk Gummi Kunststoffe,  Vol. 61, (2006), 43-48.
11.   Ezzat, F., Ali, W. and Hasouna, A., "Friction coefficient of rubber sliding against polymeric indoor flooring materials of different surface roughness", KGK. Kautschuk, Gummi, Kunststoffe,  Vol. 61, No. 12, (2008), 638-641.
12.   Mohamed, M., Samy, A. and Ali, W., "Friction coefficient of rubber shoes sliding against ceramic flooring", KGK. Kautschuk, Gummi, Kunststoffe,  Vol. 65, No. 1-2, (2012), 52-57.
13.   Li, K.W. and Chen, C.J., "The effect of shoe soling tread groove width on the coefficient of friction with different sole materials, floors, and contaminants", Applied Ergonomics,  Vol. 35, No. 6, (2004), 499-507.
14.   EI-SHERBINY, Y., Samy, A. and AII, W., "Friction coefficient of rubber sliding against dusty indoor flooring", KGK. Kautschuk, Gummi, Kunststoffe,  Vol. 65, No. 3, (2012), 37-42.
15.   Li, K.W., Wu, H.H. and Lin, Y.-C., "The effect of shoe sole tread groove depth on the friction coefficient with different tread groove widths, floors and contaminants", Applied ergonomics,  Vol. 37, No. 6, (2006), 743-748.
16.   El-Sherbiny, Y., Mohamed, M. and Ali, W., "Friction coefficient displayed by footwear walking against rubber floorings fitted by cylindrical treads", Journal of the Egyptian Society of Tribology,  Vol. 8, No. 1, (2011), 1-12.
International Journal of Engineering
Volume 30, Issue 5
TRANSACTIONS B: Applications
May 2017
Pages 768-774

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