The objective of this study is to investigate the hysteresis loss of ultra-large off-the-road (OTR) tire rubber compounds based on typical operating conditions at mine sites. Cyclic tensile tests were conducted on tread and sidewall compounds at six strain levels ranging from 10% to 100%, eight strain rates from 10% to 500% s⁻¹ and 14 rubber temperatures from −30°C to 100°C. The test results showed that a large strain level (e.g. 100%) increased the hysteresis loss of tire rubber compounds considerably. Hysteresis loss of tire rubber compounds increased with a rise of strain rates, and the increasing rates became greater at large strain levels (e.g. 100%). Moreover, a rise of rubber temperatures caused a decrease in hysteresis loss; however, the decrease became less significant when the rubber temperatures were above 10°C. Compared with tread compounds, sidewall compounds showed greater hysteresis loss values and more rapid increases in hysteresis loss with the rising strain rate.

这项研究的目的是根据矿场的典型工作条件，研究超大型越野（OTR）轮胎胶料的磁滞损耗。对胎面和胎侧胶进行了循环拉伸试验，其应变等级从10％到100％不等，八个应变率从10％到500％s ^-1以及从-30°C到100°C的14个橡胶温度。测试结果表明，较大的应变水平（例如100％）会大大增加轮胎胶料的磁滞损耗。轮胎橡胶混合物的磁滞损耗随着应变率的增加而增加，并且在较大应变水平（例如100％）下，增加的速率变得更大。此外，橡胶温度的升高引起磁滞损耗的降低；但是，当橡胶温度高于10°C时，降幅变得不那么明显。与胎面胶相比，胎侧胶显示出更大的磁滞损耗值，并且随着应变率的升高，磁滞损耗的增加更快。