Review
Chemistry, Multidisciplinary
Sibo Chen, Yaxin Jiang, Zhenxing Zhu, Qi Zhang, Chenxi Zhang, Qiang Zhang, Weizhong Qian, Shijun Zhang, Fei Wei
Summary: This article reviews the fluidized structure control and fluidization principles of carbon nanotubes and their nanocomposites, highlighting the importance of hierarchical structural evolution and nano-agglomerated fluidization.
Article
Engineering, Manufacturing
Marius Monoranu, Ria L. Mitchell, Kevin Kerrigan, J. Patrick A. Fairclough, Hassan Ghadbeigi
Summary: The study investigated the effect of particle reinforcements on chip formation and machining induced damage in CFRPs, by modifying the epoxy matrix with silica nanoparticles and rubber microparticles. The presence of particulate fillers affected the chip formation process, with different particle types and concentrations resulting in varying cutting forces and surface metrics. Rubber modified samples showed the least subsurface damage, followed by samples with silica particles and unmodified epoxy samples.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Polymer Science
Gayathri Thanasekaran, M. Basheer Ahamed, Kalim Deshmukh, Subramanian Venkatachalam
Summary: Iron oxide nanoparticles, graphene nanoplatelets, and nanodiamonds were used to reinforce poly(vinylidene fluoride-co-hexafluoropropylene) nanocomposites. The structure, morphology, thermal behavior, and dielectric properties of the synthesized nanocomposites were studied. The electromagnetic interference shielding effectiveness of the nanocomposites was also investigated.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
F. N. Alhabill, A. S. Vaughan, T. Andritsch
Summary: The study examines the interactions between amorphous silicon nitride (Si3N4) nanofiller and an epoxy resin matrix, revealing that the processing protocol details critically affect the ultimate properties of Si3N4/epoxy nanocomposites. By controlled calcination of Si3N4, it is possible to adjust the initial surface chemistry of nanoparticles and modify their reactivity with epoxy-containing moieties.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Materials Science, Composites
Sridhar Thipperudrappa, Anupama Hiremath, Bharath Kurki Nagaraj
Summary: This study focuses on the synergistic effect of ZnO and TiO2 nanofillers in epoxy composites, showing that an appropriate amount of nanofillers can improve the mechanical properties of the composites, especially impact strength.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Ozgun Daglar, Emrah Cakmakci, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Hakan Durmaz
Summary: The study focused on developing innovative routes for hybrid polymer nanocomposite preparation using click chemistry reactions. Modified silica nanoparticles showed uniform dispersion in the polymer matrix, leading to enhancements in modulus and T-g values in the prepared hybrid nanocomposites. The gel content of the hybrid nanocomposites reached nearly 88%, confirming their successful formation.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Lihua Hong, Li Liu, Zhimin Zhang, Jiazhuo Song, Siliang Li, Kexin Chen, Guanghui Gao, Yu Wang
Summary: In this study, a transient crosslinking hydrogel was constructed by forming hydrogen bonds between core-shell particles and polyacrylamide. The hydrogel exhibited excellent mechanical properties and self-healing efficiency.
Article
Engineering, Manufacturing
Sufen Dong, Danna Wang, Ashraf Ashour, Baoguo Han, Jinping Ou
Summary: Nickel-plated carbon nanotubes (Ni-CNTs) with different aspect ratios significantly impact the mechanical properties of reactive powder concrete (RPC). Incorporating Ni-CNTs with aspect ratio of 1000 enhances compressive strength, while aspect ratio of 125 improves flexural strength, and aspect ratio of 1500 increases toughness through better dispersibility and pining effect of nickel coating.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Roozbeh Ghanadi Azar, Mohammad Sadegh Aghareb Parast, Mohammad Azadi
Summary: The presence of cyclic loading and wear increases the probability of fretting fatigue phenomenon in automobile cylinder heads. This study investigated the impact of nano-reinforcing and T6 heat-treating on the fretting fatigue behavior of cylinder head aluminum alloy. The results showed that heat-treated nano-composites had a significantly increased fretting fatigue lifetime under the lowest stress level.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Mingming Cui, Hu Huang, Lin Zhang, Jiwang Yan
Summary: In this study, a new nanosecond laser pulling method is proposed to fabricate micro-nano structures on metallic glasses. The formation mechanism and evolution of the micro-nano bulge are investigated, and various micro-nano structures are successfully created on the MG surface, affecting the surface optical diffraction. Overall, this study provides a highly flexible and controllable method for the fabrication of micro-nano structures on MGs.
Article
Mechanics
Mobin Alipour, Marco De Paoli, Sina Ghaemi, Alfredo Soldati
Summary: In this study, we investigated the dynamics of non-axisymmetric fibers in turbulent channel flow, exploring the impact of fiber curvature on their orientation and rotation rate through statistical analysis of their three-dimensional position, shape, and orientation. Our results provide insights into the behavior of curved fibers in turbulent flow environments and suggest similarities with previous studies on homogeneous isotropic turbulence.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Biochemistry & Molecular Biology
Mohamed S. El-Okaily, Amira M. EL-Rafei, Mona Basha, Nour T. Abdel Ghani, Mayyada M. H. El-Sayed, Asim Bhaumik, Amany A. Mostafa
Summary: Nano-fiber composites consisting of a blend of polyvinyl alcohol (PVA) and chitosan (CS) with different weight ratios of nano-bioactive glass (BG) were prepared by electrospinning. The drug release efficiency of the developed nano-fiber composites with BG was enhanced and sustained, with the release pattern taking place through a two-stage intra-particle diffusion mechanism. The presence of BG in the nano-fibers significantly retarded the drug release profile compared to their BG-free counterparts.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Materials Science, Ceramics
Julia Dziewanowska, Jakub Karczewski, Sharafat Ali, Natalia Anna Wojcik
Summary: The controlled nanocrystallization of the sodium-calcium-borophosphate glass was studied to investigate its effect on in vitro dissolution. Different temperatures were selected, and the glass and glass-ceramics were analyzed for their morphology, structure, and dissolution properties. The results show the presence of calcium phosphates nanocrystallites in glass-ceramics, with their content increasing with higher crystallization temperatures. Controlled nanocrystallization slowed down the dissolution, but did not affect the deposition of hydroxyapatite. The presence of calcium phosphate nanocrystallites enhances B3+ release and has potential applications in controlling dissolution rate and enhancing hydroxyapatite deposition.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Anoud Alkhayal, Arshia Fathima, Ali H. Alhasan, Edreese H. Alsharaeh
Summary: The study successfully synthesized Fe3O4/RGO/PEG nanocomposites with good biocompatibility and excellent magnetic hyperthermia performance using a microwave hydrothermal method. Followed by magnetically induced heating studies and cytotoxicity tests, the nanocomposites showed high potential for thermal therapy applications.
Article
Materials Science, Multidisciplinary
B. Sadeghi, P. Cavaliere, A. Laska, A. Perrone, G. Blasi, A. Gopinathan, M. Shamanian, F. Ashrafizadeh
Summary: Understanding the cyclic behaviour of Alumina reinforced Aluminium composites (Al-A2O3) is crucial for their application in various industries. This study focuses on the cyclic behaviour of Al-Alumina nanocomposites produced through spark plasma sintering (SPS) and friction stir welding (FSW). The microstructure of the samples is characterized using optical microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy, and their mechanical properties are studied. The results show that the mechanical and fatigue properties of the nanocomposites depend on the material properties and the conditions of friction stir welding.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Joel de Jesus, Jose Antonio Martins Ferreira, Luis Borrego, Jose D. Costa, Carlos Capela
Summary: Selective laser melting (SLM) is an additive manufacturing process used for producing metallic components with complex geometries, but the poor surface finish and geometry effects can lead to surface stress concentration and reduced fatigue strength. This study found that specimens with internal channels had lower fatigue performance compared to solid samples, with crack initiation mainly from the internal surface, while the application of the Smith-Watson-Topper energy-based parameter was effective in predicting fatigue life.
Article
Engineering, Mechanical
R. Branco, J. D. Costa, P. A. Prates, F. Berto, C. Pereira, A. Mateus
Summary: This study investigated the effect of loading history on cyclic deformation and fatigue behavior of 7075-T651 aluminum alloy, and found that the SW-based model properly captured the effect of load history on fatigue behavior. The fatigue life predictions from numerical simulations were in agreement with experimental results.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Chemistry, Physical
Wojciech Macek, Ricardo Branco, Jose Domingos Costa, Jaroslaw Trembacz
Summary: The present study evaluates the fracture surface response of fatigued 34CrNiMo6 steel bars with transverse blind holes subjected to bending with torsion loading. The analysis of the geometric product specification and surface topography measurements show that increasing the bending to torsion moment ratio can reduce the parameters of the fractured surface while increasing the number of cycles to fatigue crack initiation.
Article
Mechanics
J. S. Jesus, L. P. Borrego, J. A. M. Ferreira, R. Branco, J. D. Costa, C. Capela
Summary: Mode I and mode I + II fatigue crack growth experiments were conducted using compaction tension shear specimens made of Ti-6Al-4V by additive manufacturing at various loading angles. The performance of different methodologies used to determine the equivalent stress intensity factor was studied. It was found that simpler methods achieved good results when considering the crack deflection angle in the algorithm. The crack growth speed was not significantly affected by the similar values of crack deflection angle, predominance of mode I loading, and similar crack closure effect.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
J. S. Jesus, L. P. Borrego, J. A. M. Ferreira, J. D. Costa, A. C. Batista, C. Capela
Summary: The fatigue crack growth behavior of titanium alloy Ti-6Al-4V after Hot Isostatic Pressing through Laser Powder Bed Fusion was analyzed. Crack growth under constant amplitude loading and the transient crack growth behavior after overloads or underloads were studied. The effect of mean stress and transient delay behavior were investigated.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Rui F. Fernandes, Joel de Jesus, Luis Borrego, Luis Vilhena, Amilcar Ramalho, Jose A. M. Ferreira
Summary: Maraging steels are widely used in the molds industry. This study analyzes the influence of deposition plane angle and saline corrosion on fatigue crack growth in maraging steel, and finds that saline corrosion increases the crack closure parameter, reducing the speed of crack propagation.
Article
Chemistry, Multidisciplinary
Miguel A. R. Pereira, Ivan Galvao, Jose Domingos Costa, Ana M. Amaro, Rui M. Leal
Summary: The objective of this paper is to demonstrate the potential of friction stir welding and its variants in joining fiber-reinforced thermoplastic polymer composites. The influence of welding parameters and methods to reduce defects are discussed.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
R. Branco, P. Prates, J. D. Costa, A. Cruces, P. Lopez-Crespo, F. Berto
Summary: This paper uses the cumulative strain energy density to predict the fatigue life of notched members under multiaxial loading. The relationship between energy absorbed and cycles to failure is established, and the proposed model is compared to other stress-based and energy-based models. The results show that the proposed model has good predictive capabilities and outperforms the other tested models.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
R. Branco, J. D. Costa, L. P. Borrego, W. Macek, F. Berto
Summary: This paper investigates the fatigue crack initiation and propagation of notched cylindrical bars made of 7050-T6 aluminium alloy subjected to multiaxial bending-torsion loading. The sites and angles of crack initiation are successfully predicted from the distribution of the first principal stress on the notch surface. Fatigue crack initiation lives are computed using the concept of energy field intensity and a local stress-strain model for notch plasticity analysis, and the predictions agree well with experimental observations.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Wojciech Macek, Reza Masoudi Nejad, Shun-Peng Zhu, Jaroslaw Trembacz, Ricardo Branco, Jose D. M. Costa, Jose A. M. Fereira, Carlos Capela
Summary: In this study, different fracture surfaces from fatigue failure of 18Ni300 steel produced by selective laser melting (SLM) were generated. Hollow round bars with a transverse hole were tested under bending-torsion to investigate crack initiation mechanisms and fatigue life. Fracture surfaces were examined by optical profilometer and scanning electron microscope, focusing on the relationship between fatigue features and fracture surface topography parameters. A fatigue life prediction model based on both surface topography values and applied load was proposed, which showed good agreement with experimental results.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Chemical
Georgino C. G. Serra, Jose A. M. Ferreira, Paulo N. B. Reis
Summary: Understanding the damage mechanisms and mechanical response of T-joints involving different materials is crucial. This study compared two configurations and examined the static and fatigue strength of the joints bonded with different adhesives. The results showed that using aluminum and a ductile adhesive resulted in the highest bending strength, while T-joints involving Al 6063-T5 base plates had the highest fatigue lives.
Proceedings Paper
Construction & Building Technology
L. P. Borrego, J. S. Jesus, J. A. M. Ferreira, J. D. Costa, C. Capela
Summary: The fatigue crack growth (FCGR) behavior of titanium alloy Ti-6Al-4V produced by Laser Powder Bed Fusion (LPBF) and subjected to Hot Isostatic Pressing (HIP) is analyzed in this study. Both the crack growth under constant amplitude loading and the transient crack growth behavior after the application of overloads were investigated. The study reveals the occurrence of crack closure induced by plasticity for stress ratio R=0 during the Paris regime. Applied overloads at R=0 and OLR=2 resulted in a retardation of FCGR due to an increase in crack closure effect induced by plasticity. Rapid transient periods were observed, which can be attributed to the small zone affected by the overloads.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021)
(2022)
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
