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Applied Composite Materials

, Volume 26, Issue 1, pp 187–204 | Cite as

A Comparison of the Properties of Carbon Fiber Epoxy Composites Produced by Non-autoclave with Vacuum Bag Only Prepreg and Autoclave Process

  • Sang Yoon ParkEmail author
  • Chi Hoon Choi
  • Won Jong Choi
  • Seong Soon Hwang
Article
  • 475 Downloads

Abstract

The non-autoclave curing technique with vacuum bag only (VBO) prepreg has been conceived as a cost-effective manufacturing method for producing high-quality composite part. This study demonstrated the feasibility of improving composite part’s performances and established the effective mitigation strategies for manufacturing induced defects, such as internal voids and surface porosity. The experimental results highlighted the fact that voids and surface porosity were clearly dependent on the resin viscosity state at an intermediate dwell stage of the curing process. Thereafter, the enhancement of resin flow could lead to achieving high quality parts with minimal void content (1.3%) and high fiber fraction (53 vol.%). The mechanical testing showed comparable in-plane shear and compressive strength to conventional autoclave. The microscopic observations also supported the evidence of improved interfacial bonding in terms of excellent fiber wet-out and minimal void content for the optimized cure cycle condition.

Keywords

VBO prepreg Viscosity Cure cycle Void content Mechanical properties 

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Hyundai Automotive Research & Development DivisionHwaseong-SiSouth Korea
  2. 2.Department of Materials EngineeringKorea Aerospace UniversityGoyang-siSouth Korea

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