Reduction of void content of vacuum-assisted resin transfer molded composites by infusion pressure control

Dingding Chen, Kazuo Arakawa, Changheng Xu

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Vacuum-assisted resin transfer molding is a promising technique for making large and complex composite structures. However, void formation remains a problem. Two primary contributors to void formation, non-uniform resin flow and continuous evaporation of resin under low pressure, were experimentally studied. Improved pressure control at the vent is proposed to reduce the void content of the manufactured composite material: at the start of the resin infusion, the pressure at the vent is set to the full vacuum of the equipment, while after the resin has saturated all of the reinforcements, the pressure at the vent is increased slightly. The full vacuum at the start of infusion avoids air entrapment, and the slightly higher pressure later in the process restrains the resin evaporation. A lower void content is obtained.

Original languageEnglish
Pages (from-to)1629-1637
Number of pages9
JournalPolymer Composites
Volume36
Issue number9
DOIs
Publication statusPublished - Sep 1 2015

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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