| Steel wheel is widely used in highway traffic, especially in heavy, large passenger and transport vehicles. For the reason, the study of steel wheels'fatigue properties is important. In this paper, using the project " the virtual fatigue bench test of steel wheels system studying" which was done with Yanshan University and Changchun FAW-wheel factory as the background, two-piece welded steel wheels are the main studying object. Combining finite element analysis and fatigue calculation method, the key technical difficulties of steel wheels'evaluation system of virtualization are solved. The virtualization of steel wheels'bending fatigue test, radial fatigue test and biaxial fatigue test was established successfully. This is significant for the steel wheels'parallel design and virtual testing.This paper mainly contains the following contents:(1)According to steel wheels'structure characteristics and production process, the modeling of steel wheels, finite element analysis and fatigue calculation was studied systematically. The common model of virtual evaluation was established. Fatigue evaluation of wheel products can not only predict by the stress and strain results of the finite element analysis. The region of maximum stress and strain value is only possible fatigue area. The statistics of fatigue damage should also be thought.(2)For the typical steel wheels, material properties experiment, loading method, effects of interference for fatigue life, simulation of welding process, and tire's parameters are studied. All of those are the foundations of the steel wheels'virtual fatigue evaluation.(3)Based on national standards GBT 5909-2009 "performance requirements and test methods of commercial vehicle wheels", boundary conditions, loading test parameters and method of virtual bending test are established. Using the finite element method, element nodal stress and strain values were gained by the virtual analysis and calculation of the steel wheels. Through the fatigue analysis software, choosing the corresponding fatigue statistical method and the nearest S-N curve, using the Rain-Flow method and Minner damage accumulation theory, the region of bending fatigue and fatigue life are predicted. (4)Based on national standards GBT 5909-2009"performance requirements and test methods of commercial vehicle wheels", boundary conditions, loading test parameters and method of virtual radial test are established. Using the finite element method, element nodal stress and strain values were gained by the virtual analysis and calculation of the steel wheels. Through the fatigue analysis software, choosing the corresponding fatigue statistical method and the nearest S-N curve, using the Rain-Flow method and Minner damage accumulation theory, the region of bending fatigue and fatigue life are predicted. The connection of radial loading and steel wheels'fatigue life can be gained.(5)Based on SAE J2562 "wheel's biaxial fatigue test", through the study of steel wheels'biaxial fatigue test, the virtual biaxial fatigue testing method of steel wheels is established. Using finite element analysis and fatigue statistical method, and the object-oriented thinking, stress and strain values applied under different biaxial load spectrum, the order and the time of different biaxial load spectrum are completely achieved.
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