Article
Materials Science, Composites
Xiaoer Wang, Tianxiang Zhu, Zhen-Yan Deng, Xinluo Zhao
Summary: Short single-wall carbon nanotubes (SWCNTs)/epoxy composites with a low weight ratio of SWCNTs (0.03% to 0.5%) were fabricated. The tensile fracture strength initially increases with increasing SWCNT content, reaches a maximum at 0.05 wt%, and then decreases. A model analysis suggests that the transition from local matrix fracture to SWCNT debonding is responsible for the decrease in tensile strength. The study partly explains the variations in fracture strength observed in CNT reinforced composites.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
Mohammad Mahdi Nekahi, Emiliano Villasenor Vazquez, Marcello Papini
Summary: This article discusses the use of sacrificial composite coating layers to protect surfaces from solid particle erosion. Experimental and simulation results show that the erosion mechanisms of the composite material depend on the relative sizes of the reinforcing and abrasive particles. The model successfully predicts the erosion rate of the composite material and is validated using non-contact profilometry.
Article
Construction & Building Technology
Pitcha Jongvivatsakul, Chanachai Thongchom, Amaras Mathuros, Tosporn Prasertsri, Musa Adamu, Shanya Orasutthikul, Akhrawat Lenwari, Tawatchai Charainpanitkul
Summary: This study investigates the use of carbon nanotubes (CNTs) as additives to enhance the bonding strength between concrete and carbon fiber reinforced polymer (CFRP). By adding different types and weight percentages of CNTs to epoxy, single-shear tests were conducted to analyze the bonding behavior. The results show that a certain proportion of CNTs modified epoxy can improve the bonding strength and interfacial fracture energy.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Composites
Zhouyi Li, Zhen Wang, Weibang Lu, Xi Zhou, Tao Suo
Summary: This study investigated the loading rate sensitivity of mode II fracture behavior of composites toughened by carbon nanotubes (CNTs). It was found that under quasi-static loading conditions, increasing the number of CNT layers can improve the fracture toughness of the composites, while under dynamic loading conditions, the effect of increasing CNT layers on fracture toughness is minimal.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Hao Tang, Hua Zhou, Xianhua Cheng
Summary: This study improved the tribological property of epoxy composite by filling carbon fiber-carbon nanotube multiscale hybrid synthesized via the non-corrosive LaCl3 surface treatment method. The reductions in friction coefficient and wear rate of the hybrid reinforced composite were significant, which can be attributed to the lowered surface adhesion and strengthened interfacial property. The study also analyzed the tribological characteristics of the epoxy composite under different reciprocating frequency and load.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Serkan Apay, Mert Kilincel
Summary: In this study, nano-sized Al2O3, Boron, and TiO2 powders were added to the epoxy polymer at different ratios. The abrasive wear resistance properties of the nanoparticle-reinforced epoxy polymers were investigated. The results showed that the addition of boron nanoparticles increased the wear resistance of the epoxy specimens. SEM and optical profilometry were used to analyze the friction coefficient and surface morphology of the composites. The highest wear resistance was obtained in the epoxy composites reinforced with 1% boron powder. The addition of nano boron also reduced the friction coefficient and surface roughness of the epoxy.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Materials Science, Multidisciplinary
Sinan Liu, Di Wu, Jian Zhao, Yanyan Hou, Yan Jin, Dan Sun
Summary: This study systematically investigated the material removal mechanism of AFRP under different fiber cutting angles and cutting parameters. The results show that the removal process involves peeling of aramid fibers from the resin matrix, tensile fracture of the fibers, and severe fiber deformation and interfacial debonding. The findings provide valuable insights into the material removal mechanism of AFRP and may inspire future research in material protection in composite manufacturing.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jun Huang, Kai Xiao, Denis Rodrigue
Summary: This study used different concentrations (0-0.2 wt.%) of multiwall carbon nanotubes (MWCNT) to enhance the mechanical properties of cementitious composites. The results showed that adding 0.05 wt.% of MWCNT produced the maximum reinforcement in terms of flexural and compressive strength. The study also revealed that MWCNTs can facilitate the hydration of cement by absorbing and releasing water.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Automation & Control Systems
Carla Moreira Machado, Duarte Silva, Catarina Vidal, Bruno Soares, Jorge Pamies Teixeira
Summary: The study introduces a new approach to assess drilling-induced damage by quantifying the damage using image processing and digital radiography, reducing the affected area to obtain a clear value across different shapes, providing an efficient and quick method for quantifying drilling-induced damage.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Philipp Kukla, Lara Greiner, Sebastian Eibl, Manfred Doering, Frank Schoenberger
Summary: In this study, various phosphasilazanes are incorporated into the RTM 6 epoxy matrix of CFRP to investigate their flame-retarding and fiber-protective properties. Residual carbon fibers are analyzed for their diameter and composition of deposits. The decomposition process of phosphasilazanes is characterized. The flame-retardant efficiency and mode of action are compared for different phosphasilazanes.
Article
Chemistry, Physical
Yongjun Zhou, Yuanya Zhang, Jing Wang, Yu He, Junya Yuan, Xuehu Men
Summary: A vinelike MXene@MoS2/Carbon nanofiber aerogel (MMoCA) was constructed via directed freezing method and cellulose carbonization treatment. The MMoCA exhibited long-range-aligned 3D porous lamellar structure with good dispersion of MXene@MoS2 inside. This novel aerogel endowed epoxy resin composites with outstanding thermal properties and great potential in tribological applications.
Article
Engineering, Civil
Shengqi Pan, Qiyi Dai, Babak Safaei, Zhaoye Qin, Fulei Chu
Summary: This paper investigates the damping characteristics of carbon nanotube reinforced epoxy nanocomposite beams, proposing a modified Biot model for simulation and implementing it into a finite element model. The comparison between theoretical and experimental results shows the improved accuracy of the modified Biot model, with the damping ratios of composite beam specimens fluctuating with the increment of CNT weight ratio.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Manufacturing
Bao Le, Arnaud Kernin, Jibran Khaliq, Guoyu Fu, Dehong Huo, Emiliano Bilotti, Han Zhang, Islam Shyha
Summary: This study investigates the feasibility of micromachining on nanocomposites and analyzes the effects of factors like filler loading, cutting speed, and feed per tooth. The research reveals that adding multi-walled carbon nanotubes can significantly enhance the machinability of materials, reducing cutting force and improving surface quality.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Mechanical
Hongjuan Yang, Dongsheng Yang, Guiming Mei, Cheng Cai, Xingqiao Deng, Yin Yang
Summary: Delamination wear greatly increases the wear loss of the carbon strip and affects the physicochemical properties of the contact pairs in the pantograph-catenary system. This study investigated the wear evolution mechanisms and the extension of delamination wear using a carbon/copper-alloy friction pair and calculated the arc discharge energy to explore the quantitative relationship between delamination wear and arc discharge. The results showed that the frictional coefficient gradually increased with the experiment and was higher with electric current. Under intense arcing, delamination wear initially appeared on one edge of the strip and extended to the middle, leading to increased wear and enhanced arc discharge. Delamination wear and its extension were caused by the cumulative effect of heat from long-term strong arc discharge.
Article
Polymer Science
Majed H. Moosa, Mohamed Abu-Okail, Ahmed Abu-Oqail, Samah A. Al-Shelkamy, W. M. Shewakh, M. Abdel Ghafaar
Summary: This study explores the influence of geometric alternatives for fiber directions on the structural and tribological properties of glass and carbon fibers in polymeric composite fabrics for bushing applications. The results reveal that carbon fibers exhibit better fusion capability with epoxy resin, resulting in lower wear volume loss and friction coefficient.
