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80421

FRICTION COEFICIENT OF SEMI-SPHERICAL RUBBER PROTRUSIONS SLIDING AGAINST RUBBER

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Last updated: 25 Dec 2024

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Abstract

ABSTRACT
It is necessary to reduce slip and fall in bathrooms, workshops, kid gardens, halls and walking yards. The present work aims to test the frictional behavior of rubber semi-spherical balls of different diameter and hardness to have specific information about their friction coefficient and evaluate their performance in increasing friction coefficient at dry, water, detergent wetted and oil lubricated floorings. The tested semi-spherical rubber protrusions were aimed to be used as protrusions in the rubber mat. They were of diameters ranging from 29 to 42 mm. The hardness ranged from 37.1 to 75.3 Shore A. Tests were carried out using test rig designed for that purpose. Loads were applied by wear foot of smooth rubber surface up to 250 N. The normal and friction forces were measured to determine the static friction coefficient.
 
It was found that friction coefficient decreased with increasing normal load and hardness. Friction coefficient drastically decreased with increasing hardness when sliding against water, detergent and oil lubricated rubber. It showed significant increase with increasing the diameter of the semi-spherical protrusions. This behavior depended on the ability of the semi-spherical protrusion to allow the water to escape from the contact area, where the contact is between rubber against rubber interfaces. Sliding against detergent wetted rubber showed relatively higher friction coefficient up to 0.25 at protrusions diameter of 42 mm. This is a promising result and can be used in application to avoid slip on detergent wetted surfaces.

DOI

10.21608/jest.2013.80421

Keywords

Friction coefficient, rubber floor mat, semi-spherical protrusions, dry, water, detergent, oil

Authors

First Name

Y. M.

Last Name

El-Sherbiny

MiddleName

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Affiliation

Dept. of Civil and Architectural Engineering, , Dokki, .

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Orcid

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First Name

Y. G.

Last Name

Al-Qaham

MiddleName

-

Affiliation

Faculty of Engineering, Taif University, P. N. 888, Al-Taif, Saudi Arabia.

Email

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City

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Orcid

-

First Name

W. Y.

Last Name

Ali

MiddleName

-

Affiliation

Faculty of Engineering, Taif University, P. N. 888, Al-Taif, Saudi Arabia.

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Volume

10

Article Issue

3

Related Issue

12067

Issue Date

2013-07-01

Receive Date

2013-04-11

Publish Date

2013-07-01

Page Start

1

Page End

12

Print ISSN

2090-5882

Online ISSN

2090-5955

Article File

JEST_Volume 10_Issue 3_Pages 1-12.pdf

PDF . 517.9kB

Link

https://jest.journals.ekb.eg/article_80421.html

Detail API

https://jest.journals.ekb.eg/service?article_code=80421

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Type

Original Article

Type Code

1,211

Publication Type

Journal

Publication Title

Journal of the Egyptian Society of Tribology

Publication Link

https://jest.journals.ekb.eg/

MainTitle

FRICTION COEFICIENT OF SEMI-SPHERICAL RUBBER PROTRUSIONS SLIDING AGAINST RUBBER

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Article

Created At

22 Jan 2023