Özet:

On a certain ground, the tractive performance of an off-road vehicle depends largely on the interaction of its tires with the terrain. Accordingly, studying the behavior of tires has a great importance. It is aimed to provide information about the effect of different tire circumferential lug angles on the tractive performance in this study. A single wheel test setup was designed and produced for this purpose. Tractive performance of a pneumatic tire used as drive tire of off-road vehicles and a rigid wheel having different circumferential lug angles was investigated with this setup. Various axle loads, hard soil ground and lug angles were selected as work parameters. As a result, it was determined that effects of controlled variables on slip ratio and tractive efficiency obtained by drawbar pull were important. Average slip ratio of the rigid wheel with 0º circumference lug angle was the highest, because adherence to ground of this rigid wheel is insufficient. The maximum tractive efficiency was achieved at a value of 66 % on a rigid wheel with a 45 ° circumferential lug angle. It was seen that the performances of the pneumatic wheel with 45º circumferential lug angle and the rigid wheel with 45º circumferential lug angle were so close to each other. The rigid wheel with 15º circumferential lug angle performed best in low axle loads, while the rigid wheel with 45º performed best in high axle loads. A reference can be constituted for optimum tire lug angle determination by analyzing the rolling resistance in the future studies.

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