Experimental investigation and analytical verification of buckling of functionally graded carbon nanotube-reinforced sandwich beams
Emrah Madenci,
Yasin Onuralp Özkılıç,
Alireza Bahrami,
Ceyhun Aksoylu,
Muhammad Rizal Muhammad Asyraf,
Ibrahim Y. Hakeem,
Alexey N. Beskopylny,
Sergey A. Stel'makh,
Evgenii M. Shcherban,
Sabry Fayed
Affiliations
Emrah Madenci
Department of Civil Engineering, Necmettin Erbakan University, 42090, Konya, Turkey
Yasin Onuralp Özkılıç
Department of Civil Engineering, Necmettin Erbakan University, 42090, Konya, Turkey; Department of Civil Engineering, Lebanese American University, Byblos, Lebanon; World Class Research Center, Advanced Digital Technologies, State Marine Technical University, Saint Petersburg, 190121, Russia; Corresponding author. Department of Civil Engineering, Necmettin Erbakan University, 42090, Konya, Turkey.
Alireza Bahrami
Department of Building Engineering, Energy Systems and Sustainability Science, Faculty of Engineering and Sustainable Development, University of Gävle, 801 76 Gävle, Sweden; Corresponding author.
Ceyhun Aksoylu
Department of Civil Engineering, Konya Technical University, 42250, Konya, Turkey
Muhammad Rizal Muhammad Asyraf
Engineering Design Research Group, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
Ibrahim Y. Hakeem
Department of Civil Engineering, College of Engineering, Najran University, Najran, Saudi Arabia
Alexey N. Beskopylny
Department of Transport Systems, Faculty of Roads and Transport Systems, Don State Technical University, 344003, Rostov-on-Don, Russia
Sergey A. Stel'makh
Department of Unique Buildings and Constructions Engineering, Don State Technical University, Gagarin Sq. 1, 344003, Rostov-on-Don, Russia
Evgenii M. Shcherban
Department of Engineering Geology, Bases, and Foundations, Don State Technical University, 344003, Rostov-on-Don, Russia
Sabry Fayed
Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafr El Sheikh, 33516, Egypt
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.
