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Automotive Engineering ›› 2020, Vol. 42 ›› Issue (8): 1124-1130.doi: 10.19562/j.chinasae.qcgc.2020.08.018

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

Jing Min1, Gong Youkun2, Wang Zhiwen1, Liu Yongjie1, Li Na1, Song Zengrui2, Ning Huiming2, Hu Ning2   

  1. 1. Beijing Automotive Technology Center Co., Ltd., Beijing 101300;
    2. College of Aerospace Engineering, Chongqing University, Chongqing 400044
  • Received:2019-09-19 Online:2020-08-25 Published:2020-09-24

Abstract: 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.

Key words: vehicle body, super-hybrid composite, FEM, curing deformation