Improvement of lateral property of unidirectional-strengthened CFRP laminates using recycled carbon fiber

Annisa Prita Melinda; Rino Yamamoto; Yuichi Miyasaka; Fengky Satria Yoresta; Yusuke Imai; Yoshiki Sugimoto; Kazuki Nomura; Yukihiro Matsumoto

doi:10.1038/s41598-023-40813-2

Improvement of lateral property of unidirectional-strengthened CFRP laminates using recycled carbon fiber

Sci Rep. 2023 Aug 22;13(1):13697. doi: 10.1038/s41598-023-40813-2.

Authors

Annisa Prita Melinda^{1

2}, Rino Yamamoto³, Yuichi Miyasaka³, Fengky Satria Yoresta^{3

4}, Yusuke Imai⁵, Yoshiki Sugimoto⁵, Kazuki Nomura⁶, Yukihiro Matsumoto³

Affiliations

¹ Department of Architecture and Civil Engineering, Toyohashi University of Technology, Hibarigaoka 1-1, Tempaku-cho, Toyohashi, Aichi , 441-8580, Japan. annisaprita@ft.unp.ac.id.
² Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Padang, West Sumatera , 25713, Indonesia. annisaprita@ft.unp.ac.id.
³ Department of Architecture and Civil Engineering, Toyohashi University of Technology, Hibarigaoka 1-1, Tempaku-cho, Toyohashi, Aichi , 441-8580, Japan.
⁴ Department of Forest Products, IPB University, Bogor, 16680, Indonesia.
⁵ National Institute of Advanced Industrial Science and Technology (AIST), 205, Sakurazaka-4chome, Moriyama-ku, Nagoya, Aichi, 463-8560, Japan.
⁶ Development Section, SOBUE CLAY Co., 2-1-4, Shinfune-cho, Minato-ku, Nagoya, Aichi, 455-0071, Japan.

Abstract

The unidirectional carbon fiber reinforced polymer (UD-CFRP) lacks the modulus of elasticity and strength in the lateral direction. This study investigates whether matrix resin with CFRP waste, recycled carbon fiber (rCF), can improve the lateral properties of CFRP. In total, twelve CFRP strips specimen were prefabricated of unidirectional carbon fiber (CF) sheet by hand lay-up (HLU) method and were tested by tensile test and X-ray computed tomography (X-ray CT). Factors such as fiber direction and void distribution significantly affecting its mechanical properties are assessed by X-ray CT inspection. It can be seen that rCF is mixed in a random direction at the position filled with matrix resin without rCF. However, a similar frequency of unimpregnation and voids can be observed in both specimens. Test results showed that experimental values of CFRP laminates with rCF-mixed matrix resin increased compared to the CFRP laminates without rCF. The percentage increase in the lateral tensile strength and modulus of elasticity of the rCFRP compared to the control specimen without rCF is 27.36% and 10.62%, respectively. This study proved that rCF can increase the lateral properties of unidirectional CFRP and shows the effective use of rCF for strengthening material in construction applications.