Article
Mechanics
Supen Kumar Sah, Anup Ghosh
Summary: This article investigates the free vibration and buckling of multi-directional porous FGM sandwich plates, obtaining equilibrium equations based on sinusoidal shear deformation theory and using Navier's solution technique for simply supported cases. Different porous distribution models are considered for the FGM face sheets, and the influence of various factors on the natural frequency and critical buckling load of the sandwich plate is analyzed.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Ali Alnujaie, Atteshamuddin S. Sayyad, Lazreg Hadji, Abdelouahe Tounsi
Summary: This article investigates the buckling and free vibration of multi-directional functionally graded material (FGM) sandwich plates. By considering the continuous variation of material properties in different directions, the buckling and vibration characteristics of multi-directional FGM sandwich plates are analyzed. The results show that multi-directional FGM structures outperform uni-directional graded structures.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Article
Mathematics, Applied
Mohit Rajput, Ankit Gupta
Summary: In this paper, the thermo-mechanical stability analysis of geometrically imperfect porous functionally graded plates (FGP) with geometric nonlinearity is discussed. The study derives equations for equilibrium, stability, and compatibility using logarithmic structural kinematics and von-Karman type of geometric nonlinearity. The effect of geometric imperfection, porosity inclusion, and geometric configurations on the nonlinear stability of the FGM plate is extensively examined. The results obtained serve as a benchmark for future research.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Review
Mechanics
Aman Garg, Mohamed-Ouejdi Belarbi, H. D. Chalak, Anupam Chakrabarti
Summary: Extensive literature on the analysis of sandwich FGM structures discusses the use of these structures as important structural elements. This review study categorizes available manuscripts based on theories, material homogenization rules, and analysis methods, setting a benchmark for future research in this area. Studies on sandwich FGM structures under different loading conditions provide insights into the effects of porosities, hygrothermal loadings, and structures resting on elastic foundations.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Y. Belkhodja, D. Ouinas, H. Fekirini, J. A. Vina Olay, B. Achour, M. Touahmia, M. Boukendakdji
Summary: In this study, a new hybrid quasi-3D and 2D high-order shear deformation theory was developed to investigate the bending, free vibrations, and buckling effects on functionally graded material plates. The formulation considered transverse shear deformation and different distributions of mechanical properties across the plate thickness.
SMART STRUCTURES AND SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Sachin Hirannaiah, K. Swaminathan, T. Rajanna
Summary: The influence of thermo-mechanical load coupling and porosity distributions on the vibration and buckling characteristics of Functionally Graded Sandwich Plates (FGSPs) with cutouts is investigated using a Finite Element (FE) formulation. Two different sandwich configurations are considered and the physical neutral surface is incorporated to account for material asymmetry. A novel dynamic approach is proposed for evaluating buckling loads. The results are compared with experimental and numerical solutions from the literature, and it is revealed that the buckling capacity of FGSPs under thermomechanical loads improves when a ceramic with a lower thermal expansion coefficient is used. Additionally, at higher temperature rises, the buckling capacity increases due to an increase in porosity content, while it reduces at lower temperature rises.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
K. Swaminathan, Sachin Hirannaiah, T. Rajanna
Summary: This article investigates the influence of porosity and localized edge loads on the vibration and buckling characteristics of functionally graded material (FGM) plates using the finite element (FE) method. The results show that the vibration and buckling responses are affected by different types of localized edge loads on plates with varying porosity distributions. Parametric studies are conducted to analyze the effects of various parameters on the buckling load and natural frequency of porous FGM plates.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Mechanics
Maciej Taczala, Ryszard Buczkowski, Michal Kleiber
Summary: A nonlinear finite element analysis is presented to investigate the nonlinear behavior of functionally graded materials (FGM) plates. The material properties are assumed to vary gradually across the thickness according to a power law distribution. The starting point of the investigation is the generalized third-order plate theory which is modified in the present analysis to include the position of the neutral surface and enhanced with additional terms to represent the distribution stresses better. The plates are subjected to bending and compression loads including buckling and post-buckling analysis.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Hamza Chaabani, Said Mesmoudi, Lhoucine Boutahar, Khalid El Bikri
Summary: This work presents an effective approach to investigate the buckling and post-buckling behavior of porous FGM plates. A High Order Continuation based on the Asymptotic Numerical Method with the Finite Element Method is used for nonlinear behaviors of a Porous Functionally Graded Material plate (PFGM) with different porosity distributions. The adapted solver is proven to be more effective for analyzing non-linear mechanical phenomena and the post-buckling analysis of the PFGM plates.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Andrzej Teter, Zbigniew Kolakowski
Summary: This study investigates the multimodal buckling phenomenon of wide stiffened plates made of Functionally Graded Materials (FGM) under uniform compression. It is found that the stiffness of the stiffeners significantly affects the ultimate load-carrying capacity of the structure when the eigenvalues of the global mode and the lowest local mode are comparable.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Aerospace
Panneerselvam Balaraman, Vijayaraj Stephen Joseph Raj, Veloorillom Madhavan Sreehari
Summary: This study investigates the structural and thermal characteristics of re-entry vehicle nose structures made of functionally graded materials (FGM) in high-speed aerospace applications. The effects of various thermal environments and temperature rises on critical buckling temperature and natural frequency are analyzed. It is found that the critical buckling temperature and natural frequency decrease with uniform thermal environment and linear temperature rise. The thickness of the FGM shell also significantly influences the buckling and dynamic characteristics of the re-entry vehicle nose structure.
Article
Computer Science, Interdisciplinary Applications
Jiankang Zhang, Tiantang Yu, Tinh Quoc Bui
Summary: This study focuses on numerical investigations of the mechanical behavior of cracked composite functionally graded plates using an adaptive approach combining XIGA and LR NURBS. The method demonstrated improved accuracy through adaptive local refinements and showed characteristics of high precision at low cost and fast convergence rate compared to uniform global refinement. Various factors affecting critical buckling loads and natural frequencies were investigated.
ENGINEERING WITH COMPUTERS
(2022)
Article
Construction & Building Technology
Guermit Mohamed Bilal Chami, Amar Kahil, Lazre Hadji, Royal Madan, Abdelouah Tounsi
Summary: This study conducted free vibration analysis of multi-directional porous functionally graded sandwich plates, considering two cases: FG skin with homogeneous core and FG core with homogeneous skin. Hamilton's principle and Navier's technique were used to obtain the solution, and the results were validated with literature data. The findings indicate that multi-directional functionally graded structures perform better than uni-directional gradation.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
C. C. Hong
Summary: In this study, the effects of the third-order shear deformation theory (TSDT) on thick functionally graded material (FGM) plates-cylindrical shells under thermal vibration were investigated using the generalized differential quadrature (GDQ) method. The results show that the advanced nonlinear shear correction, FGM power law index, and environment temperature have significant influences on the thermal stress and center displacement of FGM plates-cylindrical shells.
Article
Engineering, Civil
M. M. Keleshteri, J. Jelovica
Summary: The study proposes a novel approach to simplify the boundary condition issue of higher-order differential equations by reducing the order of the governing differential equations of beams from four to two through the introduction of a new dependent function. The new method demonstrates high accuracy in buckling and vibration analysis of different kinds of composites.
ENGINEERING STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Chien H. Thai, H. Nguyen-Xuan, P. Phung-Van
Summary: This paper presents a size-dependent high-order shear deformation theory (HSDT) model for analyzing the static and free vibration of laminated composite and sandwich nanoplates. By introducing scale parameters, the size effect of nanostructures is considered, and a virtual work principle is used to establish the bending and free vibration analysis model. The results show that the characteristics of the nanostructures are influenced by the geometry, boundary condition, length-to-thickness ratio, strain gradient parameter, and nonlocal parameter.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
P. Phung-Van, H. Nguyen-Xuan, Chien H. Thai
Summary: This paper investigates the free vibration analysis of functionally graded graphene platelet-reinforced composites (FG GPLRC) plates using a nonlocal strain gradient isogeometric model based on the higher order shear deformation theory. Various distributed patterns of graphene platelets (GPLs) are considered, and the effects of different parameters on the natural frequencies of the nanoplates are examined. The results obtained in this study can serve as benchmark results for further research on FG GPLRC nanoplates.
ENGINEERING WITH COMPUTERS
(2023)
Article
Mathematics, Interdisciplinary Applications
Hao Shen, Emmanuel Brousseau, Sivakumar Kulasegaram
Summary: Nano-indentation tests are important in material science, and the possibility of using smooth particle hydrodynamics (SPH) to model the process is explored in this paper. The SPH modeling of nano-indentation is validated using published studies and compared to finite element modeling and experimental results. The results suggest that SPH is a potential technique for investigating high strain deformation phenomena on the nanoscale.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Engineering, Marine
Bao-Loi Dang, Hung Nguyen-Xuan, Magd Abdel Wahab
Summary: In this paper, a systematic and time-efficient approach is proposed to calibrate 2D VARANS-VOF models for simulating wave interaction with a porous plate. A data-driven approach combined with numerical and experimental data is developed to identify the optimal empirical coefficients associated with drag force coefficients. Advanced gradient boosting decision trees algorithms are used to accurately predict the model parameters. The developed model is validated using available experimental data, showing a high level of agreement.
Article
Engineering, Aerospace
Nam V. Nguyen, Kim Q. Tran, P. Phung-Van, Jaehong Lee, H. Nguyen-Xuan
Summary: In this study, an efficient numerical framework is proposed to explore the responses of functionally graded triply periodic minimal surface (FG-TPMS) microplates. The static bending, free vibration, and buckling characteristics of these structures are thoroughly presented for the first time. The study utilizes refined plate theory and isogeometric analysis to study these mechanical responses. It also takes into account the size effect with the modified couple stress theory. The findings contribute to the development and application of TPMS geometry in microscale structures.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Mechanics
Hien V. Do, Phuc L. H. Ho, Canh V. Le, H. Nguyen-Xuan
Summary: This study proposes a pseudo-lower bound method for direct limit analysis of two-dimensional structures and safety evaluation based on isogeometric analysis integrated through Bezier extraction. The key idea in this approach is that the stress field is separated into two parts: fictitious elastic and residual, and then the equilibrium conditions are recast using the weak form. The approximations based on the stress field automatically satisfy volumetric locking phenomena, unlike the displacement approach.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Construction & Building Technology
Vuong Nguyen-Van, Chenxi Peng, Paul J. Hazell, Jaehong Lee, H. Nguyen-Xuan, Phuong Tran
Summary: Research on strengthening and retrofitting of concrete structures against explosive loading has gained significant attention recently. This study proposes a new reinforcement method using triply periodic minimal surface (TPMS)-primitive scaffold to enhance the blast-resistant capacity of concrete panels. A numerical model is developed to investigate the performance of TPMS-primitive reinforced concrete panels subjected to blast loading, and the results are validated using experimental data. The findings indicate that the TPMS-primitive scaffold improves damage resistance and reduces deflection of the concrete panels compared to traditional rebar lattice reinforcement.
STRUCTURAL CONCRETE
(2023)
Article
Engineering, Mechanical
Lieu B. Nguyen, H. Nguyen-Xuan, Chien H. Thai, P. Phung-Van
Summary: This paper presents a size-dependent isogeometric analysis approach for modeling smart functionally graded porous nanoscale plates made of two piezoelectric materials. The nonlocal elasticity theory is employed to consider size-dependent effects and the governing equations are obtained using a combination of higher-order shear deformation theory and non-uniform rational B-splines formulations. The paper investigates the influences of various factors on the natural frequencies of the smart nanoplate and compares the results with published documents, showing the reliability and effectiveness of the proposed method.
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Thinh Huynh, Anh Tuan Pham, Jaehong Lee, H. Nguyen-Xuan
Summary: In this paper, a method for optimizing the component parameters of fuel cell hybrid electric vehicles (FCHEVs) is proposed to improve their performance and reduce operating costs. The balancing composite motion optimization (BCMO) algorithm is used to design the polymer electrolyte membrane fuel cell system, lithium-ion battery, electric motor, and differential unit. The proposed method takes into account the desired performance, hydrogen consumption, fuel cell system efficiency, and power source lifespan through a single cost function. Comparative studies validate the effectiveness of the method.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Mechanics
Chien H. Thai, A. M. J. Fereira, H. Nguyen-Xuan, P. Phung-Van, P. T. Hung
Summary: In this study, a nonlocal strain gradient isogeometric model for free vibration analysis of magneto-electro-elastic (MEE) nanoplates made of functionally graded (FG) materials is presented. The model takes into account higher-order shear deformation theory, nonlocal strain gradient theory, and isogeometric analysis method. The stiffness of MEE-FG nanoplates is shown to be influenced by two scale parameters. The natural frequency of the nanoplates is evaluated by considering the power-law scheme, geometrical parameter, nonlocal parameter, strain gradient parameter, electric voltage, and magnetic potential. The results obtained using nonlocal strain gradient theory (NSGT) are compared to those obtained using classical theory.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
H. Nguyen-Xuan, Kim Q. Tran, Chien H. Thai, Jaehong Lee
Summary: This paper investigates a new model of porous plates called Functionally Graded Triply Periodic Minimal Surface (FG-TPMS) plates. The effective moduli and Poisson's ratio of TPMS structures are evaluated using a fitting technique based on a two-phase piece-wise function. The mechanical characteristics of the FG-TPMS plates are verified through numerical examples, demonstrating their reliability and accuracy.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Abdullah Alshahrani, Sivakumar Kulasegaram
Summary: This paper investigates the impact of steel fibre properties on the rheological and mechanical properties of eco-friendly high-strength self-compacting concrete (HSSCC). The study finds that using steel fibres with higher tensile strength and smaller diameter significantly enhances the splitting tensile strength, flexural strength, and fracture energy. The study also highlights the importance of coarse aggregate content and steel fibre characteristics in influencing the properties of HSSCC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Trung Kien Nguyen, Muhammad Shazwan Suhaizan, H. Nguyen-Xuan, Phuong Tran
Summary: This work proposes a new lightweight cellular concrete with controllable mechanical properties inspired by natural cellular structures, which is suitable for prefabricated engineering applications. 3D printed sacrificial formworks with lattice and TPMS architectures were used and infiltrated with foamed concrete of different densities. The compressive performance, air void characteristics, and failure mechanisms were investigated through numerical simulations and experimental tests. The gyroid cellular structure exhibited the highest compressive capacity and the bio-inspired architecture of the formworks significantly affected the air void distribution and compressive strength of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Leonardo Leonetti, H. Nguyen-Xuan, Gui-Rong Liu
Summary: This paper investigates a new solid-shell finite element formulation, which introduces new stress variables and an extra smoothing region to improve the accuracy of the approximate solutions. The assumed natural strain and discrete shear gap techniques are employed to alleviate trapezoidal and shear locking. The proposed method successfully solves popular benchmark tests and avoids cross-diagonal meshes.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Abdullah Alshahrani, Sivakumar Kulasegaram, Abhishek Kundu
Summary: Evaluation of the elastic properties of self-compacting fibre-reinforced concrete is important in civil and structural engineering. This paper proposes a two-step homogenisation approach to predict the elastic properties of self-compacting fibre-reinforced concrete. The results show that the content of aggregates, steel fibres, and porosity significantly affect the elastic modulus, and the proposed homogenisation method can efficiently replace time-consuming laboratory tests, saving both resources and time.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
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)
