Why should trailer axles be tested for fatigue

What is the fatigue test for? Why do trailer axles need fatigue tests? Today, let's take a close look at the work of the fatigue test bed. Numerous owners in the choice of axle want to understand the basic situation of the product from all aspects, such as strength, toughness, bearing capacity, service life, etc. However, these data are usually simply a number or adjective, numerous owners feel extra bored, after reading, listening to no impression. Fatigue testing, by contrast, is more intuitive and transparent, giving a fuller picture of axle performance. Semi Trailer supplier says Fatigue testing is typically used to test the stress limit of an axle, which is the maximum value of stress that can go through an infinite number of stress cycles without damage, also known as the limit of durability. After the axle is installed on the trailer, it will continue to bear the variable load of the vehicle. If the axle quality is not up to standard, after a period of time, it is easy to form tiny cracks in the local extreme stress area, and then gradually expand from tiny cracks, eventually leading to fracture and affecting driving safety. Axle fatigue test bed is a complete simulation of the use of the axle conditions, such as the vehicle full load, or the owner's use habits, the axle by a variety of stress forces, through the repetitive load conditions, determine whether the strength, durability, toughness of the axle can meet the requirements of the relevant standards. For Daiong's regular axle, the number of fatigue tests is set to millions of times in general, which needs to last about 72 hours. If it is special vehicles such as large transport vehicles, the test data will be adjusted according to the operating conditions. After the fatigue test is completed, the axle will enter the magnetic particle flaw detection workshop to detect whether there are dark lines, cracks and other defects in the shaft body. The strength, toughness and durability will be considered qualified only after meeting the requirements of the indicators. The qualified axles only have the preliminary factory qualification, and the subsequent quality inspection procedures such as salt spray test should be carried out to further test the corrosion resistance and additional performance of the axles. Only the axles with sufficiently qualified performance can be shipped out successfully, so as to ensure that no fatigue failure occurs during the service period. Such a bridge, the owner of the natural more worry, more at ease.