KuliKowsKi K, szpicA D. Determination of directional stiffnesses of vehicles ’ tires under a static load operation. Eksploatacja i Niezawodnosc – Maintenance and Reliability 2014; 16 (1): 66–72.

Determination of Directional stiffnesses of vehicles ’ tires unDer a static loaD operation Wyznaczanie sztyWności kierunkoWych opon pojazDóW samochoDoWych W Warunkach statycznego Działania obciążenia* This paper presents the stand test results on the different tires under static conditions. The tests were conducted on a stand that al-lows registering the force and deflection of the tested tires. The results were used to determinate directional tire stiffness, by using self-made software identification. In the next stage, tread prints were made, which were used to determine the surface area of the tire contact with the ground, depending on the pressure inside the tire and the load. The results showed correlations of stiffness growth with increasing tire pressure at radial, longitudinal and torsional evaluation, the contrary conclusions were put forward in the evaluation of circumferential stiffness. The tires, which the characteristics were significantly different from the study group, were also presented. The received results can be the input data for dynamic tests