Design of Prepreg Compression Molding for Manufacturing of CFRTP B-pillar Reinforcement with Equivalent Mechanical Properties to Existing Steel Part

  • Jung-Min Lee
  • Chan-Joo Lee
  • Byung-Min Kim
  • Dae-Cheol KoEmail author
Review Paper


Prepreg compression molding (PCM) is a well-known process for manufacturing of carbon fiber reinforced thermo-plastics (CFRTP) products with high quality and production rate. However, the design method used for the development of automotive parts has not been clearly presented. In this paper, we propose a process chain that can satisfy the stiffness of existing steel products. First, the CFRTP product of a B-pillar reinforcement to satisfy the bending deformation of an existing product is designed using a structural analysis and genetic algorithms. Next, forming conditions of the product are determined by a forming analysis. To investigate the feasibility regarding the mass production of the PCM process, a rapid heating and cooling system was applied to PCM molds. The heating and cooling times of the molds were calculated using a computational fluid dynamics analysis. Finally, a CFRTP product was fabricated and its bending deformation, dimensional accuracy, and weight were evaluated.


Carbon fiber reinforced thermo-plastic (CFRTP) Process chain B-pillar Reinforcement Prepreg compression molding (PCM) 



This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A5A6099595), the Korea government (MOE) (NRF-2018R1D1A3B07049114) and the Small and Medium Business Administration of Korea (SMBA) grant funded by the Korea government (MOTIE) (No. S2522059).


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  • Jung-Min Lee
    • 1
  • Chan-Joo Lee
    • 2
  • Byung-Min Kim
    • 3
  • Dae-Cheol Ko
    • 4
    Email author
  1. 1.PNU-IFAM JRC, Pusan National UniversityBusanRepublic of Korea
  2. 2.Dongnam Regional DivisionKorea Institute of Industrial TechnologyJinju-SiRepublic of Korea
  3. 3.Division of Precision and Manufacturing SystemsPusan National UniversityBusanRepublic of Korea
  4. 4.Graduate School of Convergence SciencePusan National UniversityBusanRepublic of Korea

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