Abstract
The article presents the results of calculations of stresses caused by tire pressure on the road surface, which are necessary for modeling design situations on a scale. Calculations of actual stresses were performed based on the standard characteristics of tires, the permissible load capacity of motor vehicles, and the potentially variable air pressure in the tire. The latter has a particular influence on the change in the contour area of the contact patch. The calculation of model stresses for the model wheel was performed based on the law of dynamic similarity from the condition of the scale ratio of the actual contact area to the model area, taking into account the elastic properties of the model wheel rubber (determined by laboratory tests). The results of the study are presented as the minimum and maximum values of actual and model stresses by category (types according to main characteristics) of motor vehicles. According to the results, stresses were obtained from the model wheel depending on the type of motor vehicle (described in detail in the article), which range from 0.5 kg/cm² (bicycles) to 12.4 kg/cm² (trucks and buses). The proposed calculation method will allow simulating the calculated stresses from motor vehicle wheels for any model tests on a scale with a high degree of correspondence (to actual stresses).