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Eremeyev VA. Advances in Micro- and Nanomechanics. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4433. [PMID: 36558286 PMCID: PMC9785778 DOI: 10.3390/nano12244433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Recent advances in technologies of design, manufacturing and further studies of new materials and structures result in an essential extension of classic models of continuum and structural mechanics [...].
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Affiliation(s)
- Victor A Eremeyev
- Department of Civil and Environmental Engineering and Architecture (DICAAR), University of Cagliari, Via Marengo, 2, 09123 Cagliari, Italy
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Limkatanyu S, Sae-Long W, Mohammad-Sedighi H, Rungamornrat J, Sukontasukkul P, Imjai T, Zhang H. Static and Free Vibration Analyses of Single-Walled Carbon Nanotube (SWCNT)–Substrate Medium Systems. NANOMATERIALS 2022; 12:nano12101740. [PMID: 35630962 PMCID: PMC9145732 DOI: 10.3390/nano12101740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 02/01/2023]
Abstract
This paper proposes a novel nanobar–substrate medium model for static and free vibration analyses of single-walled carbon nanotube (SWCNT) systems embedded in the elastic substrate medium. The modified strain-gradient elasticity theory is utilized to account for the material small-scale effect, while the Gurtin–Murdoch surface theory is employed to represent the surface energy effect. The Winkler foundation model is assigned to consider the interactive mechanism between the nanobar and its surrounding substrate medium. Hamilton’s principle is used to consistently derive the system governing equation, initial conditions, and classical as well as non-classical boundary conditions. Two numerical simulations are employed to demonstrate the essence of the material small-scale effect, the surface energy effect, and the surrounding substrate medium on static and free vibration responses of single-walled carbon nanotube (SWCNT)–substrate medium systems. The simulation results show that the material small-scale effect, the surface energy effect, and the interaction between the substrate and the structure led to a system-stiffness enhancement both in static and free vibration analyses.
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Affiliation(s)
- Suchart Limkatanyu
- Department of Civil and Environmental Engineering, Faculty of Engineering, Prince of Songkla University, Songkhla 90112, Thailand;
| | - Worathep Sae-Long
- Civil Engineering Program, School of Engineering, University of Phayao, Phayao 56000, Thailand
- Correspondence:
| | - Hamid Mohammad-Sedighi
- Mechanical Engineering Department, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran;
- Drilling Center of Excellence and Research Center, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran
| | - Jaroon Rungamornrat
- Applied Mechanics and Structures Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Piti Sukontasukkul
- Construction and Building Materials Research Center, Department of Civil Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand;
| | - Thanongsak Imjai
- School of Engineering and Technology, Center of Excellence in Sustainable Disaster Management, Walailak University, Nakhon Si Thammarat 80161, Thailand;
| | - Hexin Zhang
- School of Engineering and the Built Environment, Edinburgh Napier University, Edinburgh EH14 1DJ, UK;
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Intarabut D, Sukontasukkul P, Phoo-ngernkham T, Zhang H, Yoo DY, Limkatanyu S, Chindaprasirt P. Influence of Graphene Oxide Nanoparticles on Bond-Slip Reponses between Fiber and Geopolymer Mortar. NANOMATERIALS 2022; 12:nano12060943. [PMID: 35335757 PMCID: PMC8948896 DOI: 10.3390/nano12060943] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 12/26/2022]
Abstract
In this study, the influence of graphene oxide nanoparticles on the bond-slip behavior of fiber and fly-ash-based geopolymer paste was examined. Geopolymer paste incorporating a graphene oxide nanoparticle solution was cast in half briquetted specimens and embedded with a fiber. Three types of fiber were used: steel, polypropylene, and basalt. The pullout test was performed at two distinct speeds: 1 mm/s and 3 mm/s. The results showed that the addition of graphene oxide increased the compressive strength of the geopolymer by about 7%. The bond-slip responses of fibers embedded in the geopolymer mixed with graphene oxide exhibited higher peak stress and toughness compared to those embedded in a normal geopolymer. Each fiber type also showed a different mode of failure. Both steel and polypropylene fibers showed full bond-slip responses due to their high ductility. Basalt fiber, on the other hand, because of its brittleness, failed by fiber fracture mode and showed no slip in pullout responses. Both bond strength and toughness were found to be rate-sensitive. The sensitivity was higher in the graphene oxide/geopolymer than in the conventional geopolymer.
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Affiliation(s)
- Darrakorn Intarabut
- Construction and Building Materials Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand; or
| | - Piti Sukontasukkul
- Construction and Building Materials Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand; or
- Correspondence: or ; Tel.: +66-2-555-3000
| | - Tanakorn Phoo-ngernkham
- Sustainable Construction Material Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand;
| | - Hexin Zhang
- School of Engineering and the Built Environment, Edinburgh Napier University, Edinburgh EH14 1DJ, UK;
| | - Doo-Yeol Yoo
- Department of Architectural Engineering, Hanyang University, Seongdong-gu, Seoul 04763, Korea;
| | - Suchart Limkatanyu
- Department of Civil Engineering, Faculty of Engineering, Hat Yai Campus, Prince of Songkla University, Songkla 90110, Thailand;
| | - Prinya Chindaprasirt
- Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand;
- Academy of Science, Royal Society of Thailand, Dusit, Bangkok 10210, Thailand
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