Abstract
PREDICTING THE TIRE TREAD AGE (POTENTIAL MILEAGE) ADOPTED ON SPECIFIC MECHANICAL PROPERTIES IN THE LABORATORY
Mujid Hadi Al-Hatemmi*
ABSTRACT
As the mileage of tyre is still evaluated by road test though it is a very expensive and time-consuming process. It is required to investigate a new laboratory method for predicting tire age (potential milage) by using a parameter called Potential Mileage Index (PMI) of tire. The mechanical wear in a tire is dependent on tire geometry and tread compound. So, for predicting tire wear which is leading for estimating the tire age in the laboratory, therefore it is necessary studying some mechanical properties that have a strong tie with tread compound. In this paper it has been studied some mechanical properties of different tread compounds considering the tire geometry is constant. The mechanical properties are modulus, heat built-up and relative abrasion (wear) loss then, the tire mileage is calculated in both normal and aged conditions by using PMI which is computed from an empirical relation. As PMI can mainly give an indication for wear resistance which is the major measure of tire age (mileage) therefore, practically predicting the mileage of tire in the laboratory become possible. For checking whether laboratory results given actual prediction or not, it has also studied the actual mileage of bus tires at hot re-treading condition using the same compounds, where the comparison between them shows significant results. Six mixes are used for this purpose. Results have been promising, competitive and valid for evaluating the tire life especially when compared with actual values.
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