碳纤维下控制臂轻量化设计

Lightweight design on carbon-fiber low control arm

以双横臂悬架的下控制臂为研究对象对其进行轻量化设计,为得到结构和碳纤维铺层参数对下控制臂刚度和强度性能的影响,采用了试验设计的方法。以下控制臂结构、铺层顺序和0°铺层占比作为影响因素,设计了三因素三水平正交表,研究它们对该下控制臂刚度和强度性能影响的主次顺序,并得到较佳的组合方案,将碳纤维下控制臂结果与原金属下控制臂进行比较。碳纤维下控制臂最大位移和最大应力均低于原钢质控制臂,失效因子小于1,且质量比原钢质下控制臂减轻了63.95%。结果表明,碳纤维下控制臂在轻量化的同时,其刚度和强度性能均满足设计要求。

In this article,with the focus on the lightweight design of the double wishbone suspension’s low control arm,the DOE method is adopted,in order to identify the influence of the control arm’s structure and carbon-fiber ply parameters on stiffness and strength performance.The following factors such as the control arm’s structure,layup order and 0°layup ratio are regarded as influencing factors.The three-factor three-level orthogonal table is designed,in order to explore the primary and secondary order of their effects on the low control arm’s stiffness and strength,and get a better scheme of combination.Those results obtained from the carbon-fiber low control arm are compared with those obtained from the original metal low control arm.The maximum displacement and maximum stress of the carbon-fiber low control arm are lower than those of the original metal control arm;the failure factor is less than 1,and the weight is 63.95%lighter than that of the original metal control arm.These results show that the carbon-fiber low control arm which is subject to the lightweight design enjoys desirable strength and rigidity,which meet the related requirements.