Browse > Article
http://dx.doi.org/10.6108/KSPE.2017.21.2.032

Evaluation of Void Content in Carbon Fiber/Epoxy Composites Manufactured by Different Manufacturing Process  

Yoona, Sungho (Department of Mechanical Engineering, Kumoh National Institute of Technology)
Jang, Jungkeun (Department of Mechanical Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.21, no.2, 2017 , pp. 32-40 More about this Journal
Abstract
In this study, the procedures for quantitative measurement of void contents of carbon fiber/epoxy composites were suggested. Two types of the composites were considered: autoclave cured composite and filament wound composite. Void contents of the composites were evaluated by the density of the composites and their constituents, which was determined from weights in the air and water, and the weight fraction and volume fraction of the constituents obtained from the digestion method and combustion method. The surfaces of filtered carbon fibers were examined by FE-SEM in order to investigate the validity of resin removal from the composites. According to the results, the resin in the composites could be fully removed by the digestion method and combustion method. Therefore, the weight fraction and volume fraction of the constituents, and void content of the composites could be quantitatively obtained by the suggested procedures.
Keywords
Carbon Fiber/Epoxy Composite; Void Content; Digestion Method; Combustion Method;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Little, J.E., Yuan, X.W. and Jones, M.I., "Voids Characterisation in Carbon Fibre/Epoxy Composite Laminates," 18th International Conference on Composites Materials, Jeju Island, Korea, Aug. 2011.
2 Ghiorse, S., "Effect of Void Content on Mechanical Properties of Carbon/Epoxy Laminates," SAMPE Quarterly, Vol. 24, No. 2, pp. 54-59, 1993.
3 Zhu, H.Y., Li, D.H., Zhang, D.X., Wu, B.C. and Chen, Y.Y., "Influence of Voids on Interlaminar Shear Strength of Carbon/Epoxy Fabric Laminates," Transactions of Nonferrous Metals Society of China, Vol. 19, Supplement 2, pp. s470-s475, 2009.   DOI
4 Suhot, M.A. and Suhot, A.R., "The Effects of Voids on the Flexural Properties and Failure Mechanisms of Carbon/Epoxy Composites," Jurnal Teknologi, Vol. 71, No. 2, pp. 151-157, 2014.
5 Cilley, E., Roylance, D. and Schneider, N., "Methods of Fiber and Void Measurement in Graphite/Epoxy Composites," Composite Materials: Testing and Design (Third Conference), ASTM STP 546, American Society for Testing and Materials, Baltimore, M.D., U.S.A., pp. 237-249, 1974.
6 Ghiorse, S.R., "A Comparison of Void Measurement Methods for Carbon/Epoxy Composites," U.S. Army Materials Technology Laboratory, Report MTL TR 91-13, pp. 1-20, 1991.
7 Daniel, I.M., Wooh, S.C. and Komsky, I., "Quantitative Porosity Characterization of Composite Materials by Means of Attenuation Measurements," Journal of Nondestructive Evaluation, Vol. 11, No. 1, pp. 1-8, 1992.   DOI
8 Wisnom, M.R., Reynolds, T. and Gwilliam, N., "Reduction in Interlaminar Shear Strength by Discrete and Distributed Voids," Composites Science and Technology, Vol. 56, No. 1, pp. 93-101, 1996.   DOI
9 ASTM D 792-08, "Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement," Annual Book of ASTM Standards, American Society for Testing and Materials, West Conshocken, P.A., U.S.A., 2008.
10 ASTM D 3171-09, "Standard Test Methods for Constituent Content of Composite Materials," Annual Book of ASTM Standards, American Society for Testing and Materials, West Conshocken, P.A., U.S.A., 2009.
11 ASTM D 2584-02, "Standard Test Method for Ignition Loss of Cured Reinforced Resins," Annual Book of ASTM Standards, American Society for Testing and Materials, West Conshocken, P.A., U.S.A., 2002.
12 ASTM D 2734-94, "Standard Test Methods for Void Content of Reinforced Plastics," Annual Book of ASTM Standards, American Society for Testing and Materials, West Conshocken, P.A., U.S.A., 2003.