Study On Reverse Modeling And Fatigue Performance Analysis Of Automotive Wheel Based On CT Scanning

Automobile wheels are one of the key components of the complete vehicle system.When the automobile is running,the wheels are subjected to various loads and are prone to fatigue damage.The performance of wheels plays an extremely important role in the driving safety of vehicles.Therefore,the fatigue performance of automobile wheels has become an important aspect of evaluating the performance of the whole vehicle.In this paper,the new design method of steel wheel is studied,and the structure and reliability of the new design wheel are verified by the analysis of wheel fatigue performance,which has a certain guiding significance for improving the wheel fatigue life.This project comes from the natural science foundation project of Hebei Province and the research and development project of an automobile steel wheel of a wheel company.In this study,the design of steel wheel is completed by the combination of simulation and test,and the finite element analysis and test analysis of the fatigue performance of the new product are carried out.The research wheel model is 16 × 6J.The main contents of this paper are as follows:(1)The reverse modeling of automobile steel wheel is studied.Based on the steel wheel model of CT scanning,Based on the steel wheel model of CT scanning,the triangle mesh segmentation fitting algorithm for the surface with holes in the wheel space is studied,and the reverse modeling of the steel wheel is completed.Through modeling accuracy analysis,the standard deviation of the modeling is 0.012 mm,which shows that the algorithm has a high precision for model reconstruction.(2)The repair of characteristic holes and structural design of steel wheel are studied.Based on the car steel wheel,the improved wave front hole repair algorithm is studied to complete the repair and optimization of the feature hole.The results show that the repair of the feature hole area achieves a smooth transition with the original model.The lightweight design of steel wheel structure is completed,and the reduction rate is 4.5%.In addition,in order to ensure that the lightweight wheels meet the actual use requirements,the fatigue performance of the wheels will be analyzed.(3)The numerical analysis of the mechanical properties of new automotive steelwheels is studied.The mechanical properties and S-N curve of the materials are obtained by analyzing the tensile and fatigue properties of the materials used for the automobile steel wheel.The bending fatigue finite element model of the automobile steel wheel is built by using ABAQUS,and the stress,deformation and fatigue life distribution nephogram of the steel wheel spokes are calculated.It focuses on the influence of bolt preload on wheel spoke stress distribution under bending load.The radial fatigue finite element model of automobile steel wheel was built by HyperMesh,and the stress,deformation and fatigue life nephogram of steel wheel rim were analyzed.(4)The fatigue test performance of new automobile steel wheels is studied.Through the bending fatigue test and radial fatigue test of new wheels,the failure position and cycle life of new wheels are obtained.Compared with the results of numerical analysis of mechanical properties,the failure position of wheels is consistent with the parts with large stress in numerical analysis of mechanical properties,and the test cycle life is similar to the prediction of fatigue life,which conforms to the design requirements of fatigue life,verifying the new steel Wheel reliability.