Optimized Design Of Carbon Fiber Composite Auto Parts

Carbon fiber composites are the most promising automotive lightweight materials,Composite material optimization design method is the most effective way to optimize the structure of composite materials.In the past few years,Composite materials are gaining more and more applications in automotive components because of their excellent performance.In the automotive field,manufacturing products always pursue the goal of lightweight and high stiffness,so low cost and fuel consumption become the capital of enterprise benefit and competition.In order to maintain their competitiveness,enterprises need to have a systematic and optimized design plan in selecting materials of automobile parts and optimizing parts.Therefore,the method of composite material optimization design has practical significance for automobile enterprises to improve their competitiveness and realize lightweight design of automobiles.In this paper,vehicle battery shell and suspension arm are taken as research object.Based on the mechanical foundation of composite laminates,finite element analysis method and composite material optimization design method,HyperWorks software is used as the finite element analysis and optimization software.The following research work is carried out for requirements of lightweight design:(1)Optimal design of automobile battery shell made of carbon fiber reinforced composites.The entire vehicle battery shell optimization process consists of three stages:conceptual design phase,system design phase,detailed design phase.Firstly,utilizing the free size optimization module,determining the shape of the laminate in the conceptual design stage;Then,the optimization of laying thickness is finished by size optimization module in the system design stage;Finally,the stacking sequence optimization is finished by using layer sequence optimization module in detailed design stage.The optimization results show that optimization design can reduce the weight of battery shell and the weight loss ratio is as high as 66%,the optimization effect is obvious.(2)The multi-stage optimization method of carbon fiber composite vehicle suspension arm adopts topology optimization,layer thickness optimization,stacking sequence optimization.The optimal structure distribution in design area is obtained by topology optimization,the optimized structure was trimmed with CAD and the composite layer was performed;then through the optimization of layer thickness and stacking sequence,ply thickness and optimum stacking sequence are obtained.Comparison before and after optimization,the quality of optimization is obviously smaller,the weight reduction ratio is 42.42%,and the effect of light weight is obvious.In this paper,different optimization methods are used to analyze the different automotive parts.The results show that the optimized quality is lighter than that before optimization,displacement of different conditions after optimization is much smaller than before optimization.Therefore,optimization method of this paper has certain reference value for the optimization design and manufacture of automobile structure.