As far as the low-pressure tires commonly used in modern cars are concerned, when the load on the tires is the maximum allowable value, the internal pressure of the tires is generally required to be 2.5 atmospheres, and many car drivers have such a misconception: driving on the highway It is better to lower the air pressure of the tires, so that the tires are not easy to blow out. Based on this understanding, some car drivers release part of the air in the tires before entering the highway to make the tires flat. In fact, low tire pressure can easily lead to a blowout.
When the tire pressure is too low, the contact area between the tire and the ground becomes larger, and the frictional resistance becomes larger when driving. When the car is running at high speed, the tire heats up quickly, which makes it easier to make the tire high temperature. As mentioned earlier, the high temperature of the tire will make the tire itself When the car is running at high speed, the front and rear ends of the contact surface between the tire and the ground are repeatedly bent and straightened at high frequency. For tires with low air pressure, the The magnitude of this movement is much greater than under normal atmospheric pressure. This situation is similar to the movement of bending and straightening an iron wire repeatedly very quickly. The result of repeated bending and straightening of the wire is It quickly reaches fatigue and breaks.