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Fabrication of Fiber Reinforced Plastics by Ultrasonic Welding

Konstruktion und Entwicklung von Mikrosystemen (Kemikro), RWTH Aachen University, Campus-Boulevard 30, 52074 Aachen, Germany
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J. Compos. Sci. 2018, 2(3), 56; https://doi.org/10.3390/jcs2030056
Received: 27 July 2018 / Revised: 27 August 2018 / Accepted: 13 September 2018 / Published: 17 September 2018
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Abstract

Ultrasonic fabrication of fiber reinforced plastics made from thermoplastic polymer films and carbon or glass fibers enables cycle times of a few seconds and requires investment costs of only some 10,000 €. Besides this, the raw materials can be stored at room temperature. A fiber content of 33 vol % and a tensile strength of approximately 1.2 GPa have been achieved by ultrasonic welding of nine layers of foils from polyamide, each 100 µm in thickness, and eight layers of carbon fibers, each 100 µm in thickness, in between. Besides unidirectional carbon fiber reinforced polymer composite (CFRP) samples, multi-directional CFRP plates, 116 mm, 64 mm and 1.2 mm in length, width and thickness respectively, were fabricated by processing three layers of carbon fiber canvas, each 300 µm in thickness, and eight layers of polyamide foils, each 100 µm in thickness. Furthermore, both the discontinuous and the continuous ultrasonic fabrication processes are described and the results are presented in this paper. Large-scale production still needs to be demonstrated. View Full-Text
Keywords: fiber reinforced plastics; carbon fibers; glass fibers; polymer matrix composites; thermoplastic resin; ultrasonic processing; fabrication of fiber reinforced plastics (FRP) fiber reinforced plastics; carbon fibers; glass fibers; polymer matrix composites; thermoplastic resin; ultrasonic processing; fabrication of fiber reinforced plastics (FRP)
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MDPI and ACS Style

Gomer, A.; Zou, W.; Grigat, N.; Sackmann, J.; Schomburg, W.K. Fabrication of Fiber Reinforced Plastics by Ultrasonic Welding. J. Compos. Sci. 2018, 2, 56.

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