PSI - Issue 42

Ayse Cagla Balaban et al. / Procedia Structural Integrity 42 (2022) 292–298 Ayse Cagla Balaban et al./ Structural Integrity Procedia 00 (2019) 000 – 000

298

7

Table 4. Tensile and flexural strength values of materials Material Number

Tensile Strength (MPa)

Flexural Strength (MPa)

Material 1

903

264

Material 2 (CTN)

966

274

Material 3

1222

756

Material 4 (CNT)

1303

794

It is seen that adding CNTs to Carbon Fibre/Epoxy composites showed an increase of around 7% in tensile strength for each material. On the other hand, there is a 5% increment in flexural strength for CNT-reinforced Carbon Fibre/Epoxy materials for all specimens. Since the carbon fibres are more brittle than the matrix, it is logical to have greater improvement in the tensile strength of the materials. The results showed that CNT-reinforced Carbon Fibre composites are creating excellent use of the fibre stiffness in both tension and compression. 5. Conclusion The aim of this research was to investigate the effects of CNTs as an additive in epoxy resin and four types of composite materials have been manufactured for this purpose. Tensile strength values of the materials have been obtained by Tensile Testing Procedures as well as the flexural strength values completing the 3-point bending Testing Procedures. Testing at least 5 specimens for each material and the test results from experiments showed a good bonding between the CNT-modified epoxy resin and the carbon fibres. It is clear that the CNTs generate an improved effect on both tensile strength and flexural strength of the carbon/epoxy composite materials. References ASTM standard D3039/3039M08. Standard test method for tensile properties of polymer matrix composite materials. Philadelphia, PA: ASTM International, 2014. ASTM D7264/D7264M-15 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials. American Society of Testing Materials, West Conshohocken, 2015. Balaban A.C. and Tee K.F., Toygar M.E., 2019, Low Velocity Impact Behaviour of Sandwich Composite Structures with E-Glass/Epoxy Facesheets and PVC Foam, Procedia Structural Integrity, Volume 18, Pages 577-585, ISSN 2452-3216. Bonduel, D., Kchit, N., & Claes, M., 2016. Use of carbon nanotubes in structural composites. In Smart Intelligent Aircraft Structures (SARISTU) pp. 755-762. Springer, Cham. Ciselli P., Wang Z., and Peijs T., 2007, “Reinforcing potential of carbon nanotubes in oriented polymer fibres,” Materials Technology, vo l. 22, no. 1, pp. 10 – 21. Ciselli P., Wang Z., and Peijs T., 2007, “The extraordinary reinforcing efficiency of single -walled carbon nanotubes in oriented poly(vinyl alcohol) tapes,” Nanotechnology, vol. 18, no. 45, Article ID 455709 . Ferracane J.L., Berge H.X., Condon J.R., 1998, In vitro aging of dental composites in water — effect of degree of conversion, filler volume, and filler/matrix coupling. J Biomed Mater Res, 42: 465-472. Inam F., Wong D, Manabu K. , Peijs T., 2010, Multiscale Hybrid Micro-Nanocomposites Based on Carbon Nanotubes and Carbon Fibers. Journal of Nanomaterials. Rajak DK, Wagh PH, Linul E., 2021, Manufacturing Technologies of Carbon/Glass Fiber-Reinforced Polymer Composites and Their Properties: A Review. Polymers (Basel). 13(21):3721.