The Lightweight Design And Finite Element Analysis Of The Magnesium Alloy Automobile Wheel

The automobile wheel is an important part of the automobile. It not only affects the safety and comfort of the moving automobile, but also affects the appearance of the automobile. Now automobile lightweight has become the development trend of the automotive industry. Magnesium alloys have the properties of high relative strength, good shock absorption capability, good heat dissipation and recycling use as one of the lightest engineering metal material. It is very suitable for the lightweight materials of automobile wheel. The finite element analysis is an important method for the engineering analysis. It is also a useful tool for the static strength analysis and dynamic fatigue analysis of the automobile wheel.Lightweight design of the automobile wheel has been carried out by using quality function deployment and TRIZ. A small-sized magnesium alloy automobile wheel with eight spokes is designed based on the national standard about automobile wheel rim and relevant industry standards. And the digital model is established by the three-dimensional design software UG NX. The static structural analysis of the magnesium alloy automobile wheel has been simulated with the advanced simulation module of UG NX. The result shows that the high stress distributes mainly in the region of bolt holes and the transitional region between the wheel rim and spokes. The maximum stress is less than the yield strength of magnesium alloy.The automobile wheels usually suffer the static and cyclic loading. Dynamic bending fatigue analysis and radial fatigue analysis of the designed magnesium alloy automobile wheel have been simulated based on the national standard GB/T 5334-2005 about the performance requires and test method of the automobile light alloy wheel. The result shows that the fatigue strength of the designed magnesium alloy automobile wheel satisfies the test require. The fatigue life of the magnesium alloy automobile wheel has been predicted.