Finite Element Analysis And Optimizationof The Car Wheel

This topic is mainly according to actual needs to reduce the cost of the product, according to the wheel to wheel bench finite element analysis and optimization, the method is a collection of product modeling, stress analysis, model analysis, and fatigue analysis and optimization design as one of the simulation based on the car steel wheel. It can provides design basis for designers, makes the designers predict the stress distribution, deformation and service life before product development,then reducing product development cycle and cost. Specific studies are as follows:(1)This text of car wheel is two-piece, including the spoke and rim, the connection of spoke and rim through interfere fit and weld. In order to simulate the influence of interfere fit to wheel accurately; we used elastic-plastic theory to analyze. There is only plastic deformation on rim in the analysis results. But after the later heat treatment process, the interference can be generated by residual stress eliminated.(2)Simulated the preload of wheel bolts, using beam elements to simulate the bolts, and the beam elements were loaded by temperature load method. The result shows that the influence of bolts preload to the wheel is slight.(3)According to National Standards, analyze the bending and the radial stress of the wheel. Because of the symmetric of wheel, two analysis conditions were chosen, the wheel bolt holes and the middle of two bolt holes.When analyzed the radial stress, without considering the stress concentration in the case, the dangerous points of spoke appear on the bolt holes, and the dangerous points of rim appear on both sides of the protrusions.However, the overall strength of the wheel is enough.When analyzed the bending, because the bolt hole is loaded position, so there is a stress concentration around the bolt hole. Both of the spoke and rim have additional strength reserved except the stress concentration, so that the wheel is safe.Proposed the simplified model of the wheel for the simulation following, and verified the reasonableness.(4)For the main damage of wheel is bending fatigue, the modal analysis of wheel is discussed, which to study the vibration characteristics of the wheel in the bending fatigue test deeply. Extracting the preceding twelve models proved that the vibration characteristics of the wheel to meet the requirements there was no resonance upon the wheel.(5)In order to exactly predict the fatigue life of the wheel, we analyzed the bending fatigue life of the wheel using Fatigue in ANSYS,predicted the fatigue failure location and the wheel life, provided guidance for the designer.(6)Take use of the optimization module of ANSYS,optimized the wheel spoke. The result shows that the mass of spoke reduced by 4.32%.The material has been fully utilized to achieve lower the production cost.