Measuring the Adhesion Coefficient of a Pneumatic Tire to Road Surface

National University of Architecture and Construction of Armenia, Chair of Construction Machinery and Traffic Management, Yerevan, RA

^* Corresponding author: yeghiazar.vardanyan@gmail.com

Abstract

The relevance of developing a method for measuring the adhesion coefficient of a pneumatic tire to the road surface is due to ensuring the objectivity and accuracy of road audits as well as the expertise of road traffic accidents. Based on the results of the analysis, a device for measuring the adhesion coefficient of a pneumatic tire with road surface was designed for cars weighing up to 3.5 T and more than 3.5 T. The device features interchangeable motion slide blocks, a strain gauge transducer, and an electronic computing section which provides calculations of the adhesion coefficient at two- second intervals through a special program and stores the results in the memory of the device. Subsequently, based on the results of the recorded data, a computer program is used to create a diagram of the change in the adhesion coefficient of a pneumatic tire with road surface for the road section under study, as well as and the average value is determined. Experimental studies have obtained the results of measuring the adhesion coefficient of a pneumatic tire with road in case of different conditions of the surface; dry asphalt concrete, wet asphalt concrete, dusty and wet asphalt concrete, packed snow and black ice, ay various temperature conditions. The device has been registered as an invention in the Intellectual Property Office of Armenia under No. 852Y, dated 1.11. 2023.