Full field monitoring of thickness variation in vacuum assisted resin transfer molding (VARTM)

J. M. Bayldon*, Isaac M Daniel

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Modeling of vacuum based liquid composite molding methods (e.g. VARTM) relies on good understanding of closely coupled phenomena. The resin flow depends on the preform permeability, which in turn depends on the local fluid pressure; the preform compaction behavior, and the membrane stresses in the vacuum bag. To understand the nature of these coupled phenomena it is necessary to measure the preform thickness during the infusion and consolidation process. In a series of experiments the shadow moiré method was used to obtain a full field non contact measurement of a flat plate preform while silicone oil was infused under vacuum. The moiré interference pattern was recorded. A simple method was developed to calculate the change in preform thickness based on the differences between two moiré images and used to compare the mechanical behavior of the perform during infusion with similar behavior under loading in an servo-hydraulic testing machine.The perform deformation during compaction is noticeably different from that predicted from the mechanical tests, the possible reasons for this are discussed and a method of modeling this behavior is proposed.

Original languageEnglish (US)
Title of host publication20th Technical Conference of the American Society for Composites 2005
Pages1764-1776
Number of pages13
StatePublished - Dec 1 2005
Event20th Technical Conference of the American Society for Composites 2005 - Philadelphia, PA, United States
Duration: Sep 7 2005Sep 9 2005

Publication series

Name20th Technical Conference of the American Society for Composites 2005
Volume3

Other

Other20th Technical Conference of the American Society for Composites 2005
CountryUnited States
CityPhiladelphia, PA
Period9/7/059/9/05

Keywords

  • Composites processing
  • Moiré method
  • Preforms
  • VARTM

ASJC Scopus subject areas

  • Ceramics and Composites

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