CFRP-钢超混杂结构共固化成型分析与优化

Analysis and Optimization on Co-curing Molding of CFRP-steel Composite with Super-hybrid Structures

采用碳纤维增强聚合物(CFRP)-钢超混杂复合结构对某电动汽车B柱进行轻量化设计。由于不同材料性质的差异,导致成型过程中不可避免地会出现残余应力和固化变形,影响零部件的力学性能和尺寸精度。为此,本文中通过有限元法分析了CFRP-钢超混杂复合U型结构热模压共固化成型过程,其中复合材料固化过程采用CHILE预测模型。在保证成型效率的前提下,对固化工艺参数进行了优化。结果表明,通过工艺参数的优化可有效地减小CFRP-钢超混杂共固化成型U型结构的残余应力和固化变形。

The lightweight design of the B-pillar in an electric vehicle with carbon fiber reinforced polymer(CFRP)-steel super-hybrid structure is carried out.The discrepancy in properties of different material inevitably leads to the occurrence of residual stress and solidification deformation in molding process,affecting the mechanical performance and dimensional accuracy of the components.Accordingly,the process of hot-press molding with co-curing of a U-shaped super-hybrid structure of CFRP-steel composite is analyzed by finite element method,in which the CHILE prediction model is adopted for composite curing process.On the premise of ensuring the molding efficiency,an optimization on curing process parameters is conducted.The results show that with optimized curing process parameters,the residual stress and curing deformation of the co-curing molded U-shaped super-hybrid structure of CFRP-steel composite can be effectively reduced.