Alluminum Alloy Wheel Anti Impact Property Study Based On Finite Element Methode

Aluminum alloy wheel is an important automotive part. Light mass, high strength and beautiful appearance are the main design requirements for aluminum alloy wheels. Finite Element Method is used to analyze the wheel structure, which can effectively balance those design requirements, while anti-impact property is the main strength indicator of the design. The wheel impact procedure belongs to the contact and hit category of Finite Element Method, it behaves highly nonlinear which consists of material non linear, geometry nonlinear and interface nonlinear.The three dimensional modeling software UG and finite element analysis software ANSYS/LS-DYNA are used as the tool to establish the nonlinear finite element mechanics model which includes aluminum alloy wheel, tire and striker. The establishment of the finite element model considers the actual load. Aluminum alloy material property is defined with actual test data; the model and its constraint are properly simplified; striker&wheel contact as well as tire&striker contact are defined based on penalty method of contact arithmetic in ANSYS/LS-DYNA. And according to the feature and function on different portion of the wheel, meshing is applied separately. By this way, the element and node quantity is extensively decreased, thus the calculation efficiency is highly improved.By means of the numeric simulation of the established modle, the displacement, velocity and acceleration curves of the striker and the changed distribution of the stress on the wheel are obtained. The falling time between two specified shock position is verified by test. The influence of different material property on wheel stress is studied. The possibility of the failure on risky portion of the wheel is predicted, and verified by actual test on two different impact positions. This modeling and analysis way provides a beneficial thought for wheel designer in advanced development phase.