OJCM  Vol.8 No.1 , January 2018
Effects of Ultrasonic Waves during Resin Impregnation on the Mechanical Properties of Unidirectional Composite Materials
Abstract: Effects of ultrasonic vibrations on mechanical properties of fiber reinforced plastics were investigated during molding resin impregnation process in vacuum assisted resin transfer molding. The vacuum bag including the preformed each non-crimp fabrics (carbon and glass fibers) was placed in a water bath of an ultrasonic wave generator during resin impregnation. The mechanical properties of the laminates were evaluated through the mechanical strength tests and scanning electron microscope (SEM) observation. The results revealed that ultrasonic waves improved transverse tensile, flexural, interlaminar shear, and compressive strengths of the carbon fiber (CF) laminates and interlaminar shear and compressive strengths of the glass fiber (GF) laminates. It was found from SEM observation that the fracture modes of the CF and GF laminates processed using ultrasonic waves were resin fracture. Accordingly, the adhesion of the fiber/resin interface was improved by oscillating ultrasonic vibration during resin impregnation, leading to an increase of the interface strength.
Cite this paper: Kuratani, Y. , Miki, A. , Nanami, N. , Nakatani, H. and Hamada, H. (2018) Effects of Ultrasonic Waves during Resin Impregnation on the Mechanical Properties of Unidirectional Composite Materials. Open Journal of Composite Materials, 8, 1-10. doi: 10.4236/ojcm.2018.81001.

[1]   Hull, D. and Clyne, T.W. (1996) An Introduction to Composite Materials. Cambridge University Press, Cambridge.

[2]   Suemasu, H. (2009) Mechanics of Composite Materials Introduction to Engineering Beginners. BAIFUKAN CO., LTD., Tokyo.

[3]   Nagao, Y. (2007) Development of People-Friendly Passenger Aircraft.

[4]   Kuratani, Y., Hase, K., Kawazu, T., Miki,A., Goto, A., Uozumi, T. and Hamada, H. (2016) Analysis of Mechanical Property in the Difference of Worker’s Skill and Curing Process. The 13th International Conference on Flow Processing in Composite Materials, Kyoto, 6-9 September 2016, Paper ID 44.

[5]   Sloan, J. (2011) Microwave: An Alternative to the Autoclave?

[6]   Tanaka, K. and Yamamoto, K. (2007) Study on Curing Reaction of Thermosetting Resins by Microwave Processing. Journal of Network Polymer, Japan, 28, 87-92.

[7]   Japanese Standards Association (2014) Plastics Determination of Tensile Properties. JIS K 7165:2008.

[8]   Japanese Standards Association (2014) Testing Methods for Flexural Properties of Carbon Fiber Reinforced Plastics. JIS K 7074:1988.

[9]   Japanese Standards Association (2014) Testing Method for Apparent Interlaminar Shear Strength of Carbon Fiber Reinforced Plastics by Three Point Loading Method. JIS K 7078:1991.

[10]   Japanese Standards Association (2014) Fibre-Reinforced Plastic Composites— Determination of Apparent Interlaminar Shear Strength by Short-Beam Method. JIS K 7057:2006.

[11]   Japanese Standards Association (2014) Fiber-Reinforced Plastic Composites— Determination of Compressive Properties in the In-Plane Direction. JIS K 7018:1999.