Method for determining dynamic coefficient of friction of bodies
| Autor: | Dinamutdin Misirov, Yu P Borzilov, Sergey V. Semergey, V N Yerovenko |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 971:052057 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/971/5/052057 |
| Popis: | To study the effect of the material and the roughness of the impact surface, the velocity of impact interaction and the properties of bodies on the value of the dynamic coefficient of friction, a shock testing machine is proposed that provides an impact contact effect on the bodies in a plane located at an angle adjustable from 0 to 45 ° relative to the normal line drawn to the point of impact, in the range of speeds from 12 to 72 m/sec. It is found that at an impact velocity of 25 m/sec with an increase in the angle of inclination of the impact steel plane, the angle of friction and the corresponding dynamic coefficient of friction increase in a linear relationship. The maximum values of angles φ and dynamic coefficients of friction f make: - for steel balls φ = 8.3°, f = 0.146; - for lead balls φ = 11.4°, f = 0.167; - for grains of the wheat φ = 6.8°, f = 0.12. The results obtained indicate that the elastoplastic properties and shape of the bodies do not have any significant effect on the angles of reflection of bodies from the impact plane. |
| Databáze: | OpenAIRE |
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