Optimization And Design Of Wheel Based On Composite Laminated Structure

Nowadays,under the background of energy saving and emission reduction,low-carbon environmental protection and the rise of new energy vehicles.Compared with traditional metal materials,fiber reinforced resin matrix composites have many advantages,such as light weight,high strength,corrosion resistance,creep resistance and integral forming.It is a new trend to realize the lightweight of automobiles by using composite materials.As one of the important safety components of automobile,the wheel whose materials is not only related to the light weight of the car,but also directly affects the performance of the car.Therefore,in this paper,a composite material is used to replace aluminum alloy for a car wheel,and the optimization design based on the laminated structure is carried out.In this paper,through the analysis of the static structural strength of aluminum alloy wheel under radial load,bending load and impact load,the dangerous regional can be found.And use the equal rigidity design method to replace aluminum alloy with composite materials according to the deformation result.According to the mechanics of composite material,the mechanical properties of(T300/5222)single layer plate are calculated,and the strength theory of single ply composite material is compared.The Tasi-Wu strength criterion is chosen as the strength checking criterion of composite wheel.At the same time,the stiffness matrix of the composite wheel laminate is calculated by the composite laminate theory.The mechanical properties of the composite wheel and aluminum alloy wheel were compared to determine whether the design meets the requirements of equal stiffness.At the same time,the Tasi-Wu strength criterion is used to determine whether the wheel is failure or not.The design of composite wheel should be optimized after meeting the requirements.In this paper,Opti Struct is used for the three stages optimization method of composite wheel based on laminate structure.The first stage is conceptual design,and the super layer of the hub is paved according to the preliminary design of the layer.The thickness distribution of the super layer is obtained through the optimization of the free size.The second stage is the system design.According to the thickness distribution of super layer and the process constraints,the thickness distribution of the ply beam under different angles is determined.The basic paving method is determined.The third stage is to optimize the stacking sequence,and determine the stacking order of the final composite wheel.In the three stages,the quality of the wheel is greatly reduced in the first two stages.Then the structural strength analysis and modal analysis of the optimized composite wheel are carried out.It can be found that the optimized composite hub satisfies the requirements of equal stiffness design,and the natural frequency of the first order mode is higher than that of the composite hub before optimization,and the mass is reduced by 25.34%.The stiffness matrix of the optimized composite wheel is also calculated.This paper is based on the theory of composite laminates and the optimization method of Opti Struct composite laminated structure,using the composite materials(T300/5222)to replace the aluminum alloy.According to the characteristics of composite wheel manufacturing process,the wheel which is easy to be created by process manufacturing is designed.It is improved the strength and rigidity of the wheel structure.The quality of the composite wheel is reduced by 30.46% compared with the aluminum alloy wheel.