This report was inspired by a previous Master thesis (Hansen and Larsen, 2017) at Roskilde University. The report focuses on developing a systematic investigation of how rolling resistance in pneumatic tires depends on air pressure, load and speed. With the load ranging from 13 N to 70 N, the speed ranging from 1.5 m/s to 5 m/s and pressure ranging from 1 bar to 4 bar. The pneumatic used for the experiment was an oﬀ-road roller skate pneumatic tire, prone to high speeds and loads. The experimental method used a custom built setup, including an inner drum-measurement approach. Results showed good reproducibility. A considerable amount of noise occurred for low load data points, therefore no apparent relations are concluded for the low ranging loads. The results showed that the pressure decreases the rolling resistance as pressure increases agreeing with existing literature. This is true for both rolling resistance and rolling resistance coeﬃcient, where the rate of decrease, increases with load. Increasing the load causes the rolling resistance to increase and the rolling resistance coeﬃcient to have a slight increase, which is also found in Hansen and Larsen (2017). The rate of increase for rolling resistance increases with load whilst the rate of increase for rolling resistance coeﬃcient decreases with load. The speed seems to have no signiﬁcant inﬂuence on rolling resistance and rolling resistance coeﬃcient except at the high load and low pressure data points where there appears to be a slight increase.
|Educations||Basic - Bachelor Study Program in Natural Science, (Bachelor Programme) Bachelor|
|Publication date||9 Jan 2020|
|Number of pages||44|
|Supervisors||Tina Hecksher & Morten Lau Larsen|
- Rolling Resistance
- Pneumatic tire