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Tikrit Journal of Engineering Sciences (2017) 24(2) 102-110

Studying the Effect of Roughness of Wet Road on Critical Speed of Vehicle

Ali Khaled Mohammed Ali Ibrahim Ali Muhsin Omar Khalil Al-Joboury
Mechanical Eng. Dept., Tikrit University, Iraq Energy Research Unit, Alhawija Technical Institute, Iraq

Abstract

 Hydroplaning is one the most dangerous phenomena which effect on the safety of driving cars on wet roads, then, the critical speed of slipping cars is an important parameter in the hydroplaning ,and depends on the properties of the following three parameters: tires, water layer and road surface. The road texture is the main property of road specifications which affect directly on the critical speed of the vehicle. In the present work, the properties of road roughness and influence of surface texture on critical speed of vehicle are studied with variation of the following parameters: thickness and dynamic viscosity of water on the road surface and the vehicle load. The results showed that increasing the road surface roughness and the vehicle load both has a appositive influence on the critical speed (increase)of the vehicle, while increasing the dynamic viscosity and thickness of the water layer on the road surface has a negative influence on the critical speed (decrease) of the vehicle.

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Keywords: Roughness, Road Surface, Hydroplaning, Critical Speed, Vehicle, Tire, Texture. 

How to cite

TJES: Ali AKM, Muhsin IA, Al-Joboury OK. Studying the Effect of Roughness of wet Road on Critical Speed of Vehicle. Tikrit Journal of Engineering Sciences 2017; 24 (2): 102-110.
APA: Ali, A. K. M., Muhsin, I. A., Al-Joboury, O. K. (2017). Studying the Effect of Roughness of wet Road on Critical Speed of Vehicle. Tikrit Journal of Engineering Sciences, 24(2), 102-110.