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Experimental Study of the Microvoids formation and Transport in the Vacuum Assisted Resin Transfer Molding Process  

Se Won Eun (한국항공우주연구원 우주발사체 사업단 구조그룹)
Woo Il Lee (서울대학교 기계항공공학부)
Publication Information
Composites Research / v.16, no.6, 2003 , pp. 10-15 More about this Journal
Abstract
In RTM process, the content of microvoids can be critical due to the fact that the presence of microvoids degrades mechanical properties on the fabricated composite parts. The present paper proposes an experimental method of observation in void formation and transport. VARTM processes are performed under observation with a digital video camera and then the microvoid formation in the flow front and transport are videotaped and observed both in channels and tows. The obtained data are used in the mathematical model in order to determine the model constants. Experimental results and expected results from the mathematical model show a good agreement with each other.
Keywords
microvoid; vacuum assisted resin transfer molding VARTM; capillary number; void transport;
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