Abstract
The aim of this study is to minimize the decrease in the mechanical properties of materials exposed to environmental conditions by adding nano additives, thereby increasing service life. It has been reported in the literature that boron nitride nanoparticles (BNNP), a multi-walled carbon nanotube (MWCNT), and hybrid (MWCNT + BNNP) nano additives improve the mechanical properties of FRPs and increase their lifetime. For this reason, in this study, filament wound BNNP, MWCNT, and MWCNT + BNNP hybrid reinforced carbon fiber epoxy composite pipes (CFRPs) were produced with (± 55°)4 configurations and 8 layers. Then, composite pipes were exposed to the hydrothermal aging process in distilled water at 80 °C for 7, 14, and 21 days in order to examine the effects of hot water absorption behavior on mechanical properties such as hardness, and density. The hardness and density measurements were realized in accordance with ASTM standards. The hardness, and density properties of water exposed BNNP, MWCNT, and MWCNT + BNNP hybrid reinforced and non-reinforced CFRPs were examined and compared with unexposed specimens according to ASTM standards. As a result of this study, it was observed that the hardness and density values of the specimens exposed to aging reinforced with nano-sized material were even higher than the hardness and density values of the neat epoxy unexposed to aging. Consequently, although water absorption caused a loss in the mechanical properties of the material, the negative effects of water absorption were minimized thanks to the added nano additives.
About the authors
Alper Gunoz, born in 1993, studied Mechanical Engineering and received his Master’s degree in the Department of Mechanical Engineering at Mersin University, Mersin, Turkey. He has been studying for his PhD at Mersin University since 2019. He has been working as a Research Assistant at Mersin University since 2018. His interest area mainly focuses on manufacturing of composite materials, polymer composites and nanocomposites.
Yusuf Kepir, born in 1994, graduated from the Mechanical Engineering Department in Mersin University in 2016. He has been studying for his MSc at Mersin University since 2018. He has been working as a Research Assistant at Mersin University since 2020. His main scientific interests include material science and welding technology. His interest area mainly focuses on computational fluid dynamics, material science and polymer composites.
Associate. Prof. Dr. Memduh Kara, born in 1980, graduated from the Mechanical Education Department in Suleyman Demirel University, Isparta, Turkey in 2002. He received his MSc at Selcuk University, Konya in 2006 and his PhD at Selcuk University, Turkey in 2012. He currently works as Associate Professor at the Department of Mechanical Engineering of Faculty of Engineering, Mersin University, Mersin, Turkey. His main research interests include material science, composite materials, manufacturing of composite materials, low-velocity impact of composites, nanocomposites.
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