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Ultrasonic (C-scan) and microscopic evaluation of resin transfer molded epoxy composite plates
Date
2005-02-01
Author
KAŞ, Y. ONUR
Kaynak, Cevdet
Metadata
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One of the main problem in resin transfer molding (RTM) is the formation of microvoids decreasing the mechanical performance of the components. In this study, an ultrasonic inspection method (C-scan) was used to evaluate these microvoids. Composite sample plates were produced by a small laboratory size RTM machine injecting epoxy resin into a flat mold filled with woven carbon fiber layers. In C-scan analysis a certain value of energy loss (dB loss) was selected as the 'operator set level' and further dB losses were considered as 'defect' or 'microvoid'. C-scan inspection indicated that increasing injection pressure above 2 atm increases the number of microvoids leading to decreased mechanical properties. In the second part of this study, optical and electron microscopy were used to examine these microvoids and also failure mechanisms of the samples.
Subject Keywords
Organic Chemistry
,
Polymers and Plastics
URI
https://hdl.handle.net/11511/45890
Journal
POLYMER TESTING
DOI
https://doi.org/10.1016/j.polymertesting.2004.07.002
Collections
Department of Metallurgical and Materials Engineering, Article
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Y. O. KAŞ and C. Kaynak, “Ultrasonic (C-scan) and microscopic evaluation of resin transfer molded epoxy composite plates,”
POLYMER TESTING
, pp. 114–120, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45890.