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Influences of Aging and Inflation Pressure on Stiffness and Absorbed Energy of a Passenger Car Radial Tire

Supasit Nantapuk, Sathaporn Chuepeng, Manida Tongroon


The objective of this study is to investigate the influences of aging and inflation pressure on the stiffness and absorbed energy of radial tires. By quasi-static compression test, new and 50,000-km used tires were determined for acting force and corresponding displacement. Between the 172.4 kPa and 241.3 kPa inflation pressure range for the new tire, the load was linearly increased with displacement. The absorbed energy was non-linear increasing with the displacement. The trend of the accumulative absorbed energy was increased when inflated the tire pressure. For both new and used tires, the stiffness and the absorbed energy were linearly increasing with the inflation pressure. The used tire was harder than the new tire observed by the higher tire stiffness and can be absorbed greater energy. At the rated inflation pressure of 220.6 kPa, after 50,000 km usage, the tire was intensified by 2.62% in terms of stiffness and by 2.22% in terms of energy absorbed. On average, over the inflation pressure in the range of 172.4 kPa to 241.3 kPa, the stiffness and absorbed energy were by 3.22 % and 2.98 % increase for the aging tire compared to the base new tire.

Keywords: car; energy; passenger; stiffness; suspension; tire

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DOI: 10.14416/


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