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Experimental investigation and analytical verification of buckling of functionally graded carbon nanotube-reinforced sandwich beams

Madenci E 1 , Özkılıç YO 1 , Bahrami A 2 , Aksoylu C 3 , Asyraf MRM 4 , Hakeem IY 5 Show all authors , Beskopylny AN 6 , Stel'makh SA 7 , Shcherban EM 8 , Fayed S 9

Affiliations 

  • 1 Department of Civil Engineering, Necmettin Erbakan University, 42090, Konya, Turkey
  • 2 Department of Building Engineering, Energy Systems and Sustainability Science, Faculty of Engineering and Sustainable Development, University of Gävle, 801 76 Gävle, Sweden
  • 3 Department of Civil Engineering, Konya Technical University, 42250, Konya, Turkey
  • 4 Engineering Design Research Group, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
  • 5 Department of Civil Engineering, College of Engineering, Najran University, Najran, Saudi Arabia
  • 6 Department of Transport Systems, Faculty of Roads and Transport Systems, Don State Technical University, 344003, Rostov-on-Don, Russia
  • 7 Department of Unique Buildings and Constructions Engineering, Don State Technical University, Gagarin Sq. 1, 344003, Rostov-on-Don, Russia
  • 8 Department of Engineering Geology, Bases, and Foundations, Don State Technical University, 344003, Rostov-on-Don, Russia
  • 9 Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafr El Sheikh, 33516, Egypt
Heliyon, 2024 Apr 30;10(8):e28388.
PMID: 38638992 DOI: 10.1016/j.heliyon.2024.e28388

Abstract

Carbon nanotube (CNT) reinforcement can lead to a new way to enhance the properties of composites by transforming the reinforcement phases into nanoscale fillers. In this study, the buckling response of functionally graded CNT-reinforced composite (FG-CNTRC) sandwich beams was investigated experimentally and analytically. The top and bottom plates of the sandwich beams were composed of carbon fiber laminated composite layers and hard core. The hard core was made of a pultruded glass fiber-reinforced polymer (GFRP) profile. The layers of FG-CNTRC surfaces were reinforced with different proportions of CNT. The reference sample was made of only a pultruded GFRP profile. In the study, the reference sample and four samples with CNT were tested under compression. The largest buckling load difference between the reference sample and the sample with CNT was 37.7%. The difference between the analytical calculation results and experimental results was obtained with an approximation of 0.49%-4.92%. Finally, the buckling, debonding, interlaminar cracks, and fiber breakage were observed in the samples.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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