Hamid Abdolmaleki, Ali Jafari, Ahmad Tabatabaeifar, Ali Hajiahmad, Hadi Goli
Journal of Terramechanics, Volume 59, June 2015, Pages 49-58, ISSN 0022-4898, http://dx.doi.org/10.1016/j.jterra.2015.03.002
http://www.sciencedirect.com/science/article/pii/S0022489815000300
Abstract:
An in-situ tire test rig was developed for field research on tire tractive and maneuverability performances. The Single Wheel Tester (SWT) was mounted on a tractor and a tested wheel was driven by a hydromotor, along a frame of 3 m length. In the SWT, four load cells were utilized to measure longitudinal and lateral forces, input and self-aligning torques, and two optical counters were applied to calculate forward and angular velocities. Response Surface Methodology was used to execute experimental design and to analyze the collected data. Afterwards, reduced form of a 2 Factor Interaction model was extracted to predict rolling resistance using seven factors. The test results show that increasing the normal load and side slip angle will cause an increment of rolling resistance. The incremental growth rate of the rolling resistance due to the normal load increment was observed. At higher cone index values, increasing the angular velocity reduces the rolling resistance, although at lower cone index values, the effect of angular velocity on rolling resistance is in reverse order. In addition, the increasing moisture content effect on rolling resistance at lower side slip angle values was observed.
Keywords: Single wheel tester; Rolling resistance; Side slip angle; Normal load; Drawbar pull; Angular velocity; Cone index; Moisture content; Tire inflation pressure; Response Surface Methodology