Article
Chemistry, Multidisciplinary
Kun Huang, Wei Xu
Summary: Although the individual effects of small-scale effect and thermal stress on nanobeams have been studied, their combined effects and the temperature dependence of elastic parameters have not been thoroughly investigated. In this paper, a new nonlocal nonlinear Euler-Bernoulli theory is proposed to model the mechanical properties of nanobeams, considering both small-scale effect and thermal stress, as well as the temperature dependence of Young's modulus. The study demonstrates that thermal stress and temperature dependence have a significant influence on the mechanical properties of slender nanobeams, compared to the small-scale effect induced by the nonlocal effect. Neglecting the temperature effect may lead to qualitative errors in the analysis of slender nanobeams.
Article
Mechanics
Yu-Chi Su, Tse-Yu Cho
Summary: The free vibration of a single-walled carbon nanotube embedded in an elastic medium is studied using a nonlocal Timoshenko beam model. It is found that the nonlocal effect significantly influences the natural frequencies of the SWCNT in higher modes, especially when the SWCNT has a small slenderness ratio and is embedded in a soft elastic medium.
JOURNAL OF MECHANICS
(2021)
Article
Engineering, Civil
Matteo Strozzi, Isaac E. Elishakoff, Leonid Manevitch, Oleg Gendelman
Summary: This paper compares two shell theories for the vibrations of double-walled carbon nanotubes (DWCNTs) and finds that the anisotropic elastic shell model is more accurate and Sanders shell theory is more precise than Donnell shell theory. The parametric analysis shows that Donnell shell theory gives unsatisfactory results for low wavenumbers and high aspect ratios, and cannot be used for vibration modeling of DWCNTs in a large range.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
Kun Huang, Benning Qu, Wei Xu, Ji Yao
Summary: This paper proposes two new nonlinear nonlocal Euler-Bernoulli theories to model the mechanical properties of nanobeams and investigates the static bending and forced vibrations of single-walled carbon nanotubes. The results show that both material nonlinearity and nonlocal effects have significant impacts on the mechanical properties of single-walled carbon nanotubes.
NONLINEAR DYNAMICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Muzamal Hussain, Sehar Asghar, Mohamed Amine Khadimallah, Hamdi Ayed, Sami Alghamdi, Javed Khan Bhutto, S. R. Mahmoud, Abdelouahed Tounsi
Summary: This paper investigates the frequency vibrations of double-walled carbon nanotubes (CNTs) using nonlocal elastic theory. A nonlocal Love shell model is established to perceive the inference of small scale. The governing equations are formulated as an eigen value system using the wave propagation approach. An innovative nonlocal model is proposed to examine the scale effect on the vibrational behavior of different types of double-walled CNTs. The influence of the dimensionless nonlocal parameter is studied in detail, and graphical explanations are given for the dominance of the end condition via the nonlocal parameter. The results validate the applicability of the nonlocal shell model and are supported by earlier published literature.
COMPUTERS AND CONCRETE
(2022)
Article
Mechanics
S. Ceballes, B. E. Saunders, A. Abdelkefi
Summary: The study focuses on extending the reliable reduced-order models of a carbon nanotube-based mass sensor using Timoshenko beam theory and Eringen's nonlocal theory. The discrepancies and limits of applicability between Timoshenko and Euler-Bernoulli models are deeply explored, showing that the nonlocal Timoshenko-based model is valuable for mass sensing applications, especially for short and stout structures. Researchers can utilize these findings for the design, modeling, and analysis of nanoscale sensors and resonators.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Multidisciplinary
Isa Ahmadi
Summary: This study investigates the free vibration of a multiple-nanobeam system under various edge boundary conditions and the number of coupled nanobeams. The Eringen's nonlocal elasticity theory is used to take into account the size effect, and the governing equations of the coupled beams are obtained using the Timoshenko beam theory. A meshless formulation is presented to discretize the equations into a set of ordinary differential equations in the time domain. The accuracy of the results is confirmed by comparing them with available analytical results in the literature, showing good agreement. The numerical results present the free vibration frequencies and mode shapes of the multiple-nanobeam system under various edge boundary conditions, and investigate the effects of parameters such as coupling stiffness, nonlocal parameters, and number of nanobeams. This method is useful for analyzing multiple-nanobeam systems with arbitrary number of nanobeams, arbitrary boundary conditions, coupling stiffness, and length to thickness ratio.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Mathematics, Applied
Hayri Metin Numanoglu, Hakan Ersoy, Bekir Akgoz, Omer Civalek
Summary: This study investigates the size-dependent thermo-mechanical vibration analysis of nanobeams by implementing Hamilton's principle and the stress equation of nonlocal elasticity theory. The finite element method is used to solve the eigenvalue problem and derive stiffness and mass matrices. Nonlocal finite element method is emphasized for analyzing the vibration behavior of nanobeams under different boundary conditions.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Physics, Multidisciplinary
Ufuk Gul, Metin Aydogdu
Summary: This study investigates transverse wave propagation in carbon nanotubes based on doublet mechanics theory, revealing the van Hove singularity and confirming the effectiveness of the method. Additionally, the research highlights the significance of length scale on transverse wave dispersion in multi-walled carbon nanotubes.
WAVES IN RANDOM AND COMPLEX MEDIA
(2021)
Article
Mathematics, Applied
Kalyan Boyina, Raghu Piska
Summary: This work investigates wave propagation in a viscoelastic Timoshenko nanobeam under the influence of surface stress and magnetic field effects. The study provides a mathematical model and closed-form solutions for such scenarios. The results indicate that the introduction of surface stress values increases the damping ratio of flexural and shear waves.
APPLIED MATHEMATICS AND COMPUTATION
(2023)
Article
Construction & Building Technology
Sami Alghamdi, Muzamal Hussain, Mohamed A. Khadimallah, Sehar Asghar, Emad Ghandourah, Ahmed Obaid M. Alzahrani, M. A. Alzahrani
Summary: This study investigates the vibrational behavior of double walled carbon nanotubes with different nonlocal parameters using a nonlocal shell model based on wave propagation approach. The significance of small scale is perceived through the development of a nonlocal Love shell model. The influence of changing the mechanical parameter Poisson's ratio on vibrations is analyzed in detail, and the dominance of boundary conditions via nonlocal parameter is shown graphically.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Keivan Kiani, Krzysztof Kamil Zur
Summary: In this study, suitable surface energy-nonlocal-integral and differential models were reported for investigating the mechanical behavior of a nanosystem consisting of double parallel nanorods with defects. By evaluating nonlocal-surface energy-based modes and implementing the Galerkin method, the capabilities of capturing the natural frequencies of the defected nanosystem were revealed. The roles of nonlocality, surface energy, nanorod characteristics, defect properties, and elastic interface layer constant on free vibration were explained.
COMPOSITE STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Zainab Ali, Mohamed Amine Khadimallah, Muzamal Hussain, Sehar Asghar, Faisal Al-Thobiani, Mohamed Elbahar, Elaloui Elimame, Abdelouahed Tounsi
Summary: This paper investigates the vibration characteristics of double-walled carbon nanotubes based on nonlocal elastic shell theory. The frequencies decrease with an increase in the nonlocal parameter and are influenced by changes in Poisson's ratio. The dominance of boundary conditions through the nonlocal parameter is shown graphically.
ADVANCES IN NANO RESEARCH
(2021)
Article
Mechanics
H. M. Numanoglu, H. Ersoy, O. Civalek, A. J. M. Ferreira
Summary: This article examines the free thermal vibration analysis of nanobeams surrounded by an elastic matrix using nonlocal elasticity and Timoshenko beam theories. The equation of motion for free vibration is solved by analytical method, and a weighted residue-based finite element formulation is developed for boundary conditions other than simply supported nano beams. Numerical results show the high accuracy of the nonlocal finite element formulation and the effects of size dependency and environmental factors on the dynamic behavior of nanobeams are discussed in detail.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Jinping Chen, Mohamad Khaje Khabaz, Mohammad Mehdi Ghasemian, Farag M. A. Altalbawy, Abduladheem Turki Jalil, S. Ali Eftekhari, Mohammad Hashemian, Davood Toghraie, Zeid Fadel Albahash
Summary: This study investigates the mechanical behavior of double-walled carbon nanotubes (DWCNTs) under temperature gradients and electrical fields using the nonlocal reddy beam model, with a focus on their free vibrations. The research considers the interaction of van der Waals forces, as well as the effects of a Winkler-Pasternak foundation and nonlocal elasticity. The results reveal that increasing the outer radius of the nanotube leads to a decrease in the first dimensionless frequency, while increasing the length and Winkler spring constant results in higher initial frequencies. The study also provides optimal values for the L/r2 ratio to obtain minimum and maximum dimensionless natural frequencies for the Winkler spring model and shear constant of Pasternak.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jin-Xing Shi, Keiichiro Ohmura, Masatoshi Shimoda, Xiao-Wen Lei
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2018)
Article
Computer Science, Interdisciplinary Applications
Masatoshi Shimoda, Tomohiro Nagano, Jin-Xing Shi
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2019)
Article
Engineering, Civil
Jin-Xing Shi, Sho Kozono, Masatoshi Shimoda, Masahiro Takino, Daiki Wada, Yang Liu
ENGINEERING STRUCTURES
(2019)
Review
Chemistry, Analytical
Jin-Xing Shi, Xiao-Wen Lei, Toshiaki Natsuki
Summary: This paper reviews recent studies on carbon nanomaterials-based nano-force and nano-mass sensors, introduces the mechanism of frequency-based nano sensors, and summarizes modeling approaches and material property determination. Carbon nanomaterials exhibit higher sensitivity and performance in nano-mechanical sensors compared to traditional materials like silicon and ZnO, suggesting further investigations and potential applications in the future.
Article
Computer Science, Interdisciplinary Applications
Jin-Xing Shi, Kana Yoshizumi, Masatoshi Shimoda, Shinobu Sakai
Summary: Sandwich structures with heteromorphic cores have been studied in this research to enhance their critical thermal buckling behavior. A free-form optimization system was developed based on a gradient method to optimize the core shapes under a volume constraint, showing significant improvements in thermal buckling behavior. By specifying constraint conditions in the velocity analysis, the initial shape of specified parts in the heteromorphic core could be maintained, satisfying special engineering and structural design requirements.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Chemistry, Multidisciplinary
Xiao-Wen Lei, Kazuki Bando, Jin-Xing Shi
Summary: Carbon nanomaterials, such as CNTs and GSs, are used as resonators in vibration-based nanomechanical sensors due to their high stiffness and small size. DNTs, a new class of one-dimensional carbon nanomaterials, have diamond-like structures with sp(3) bonds formed by covalent interactions between multiple benzene molecules. By studying DNTs with lattice defects, the research shows that Young's modulus and natural frequency can be controlled by altering the density of defects, and DNTs have potential applications in nano-sensors.
Article
Chemistry, Multidisciplinary
Yoshitada Tomioka, Toshiaki Natsuki, Jin-Xing Shi, Xiao-Wen Lei
Summary: The study focuses on evaluating the impact characteristics of carbon nanomaterials, particularly the newly designed wavy graphene sheets, which demonstrate enhanced resistance to kinetic energy with increased disclination density. Impact tests show that the wavy graphene sheets possess excellent impact behavior, showing potential application as high-impact-resistant components in advanced NEMS.
Article
Chemistry, Multidisciplinary
Xiao-Wen Lei, Shungo Shimizu, Jin-Xing Shi
Summary: This study investigates the interlayer deformation of graphite under compression using molecular dynamics simulation and proposes a differential geometrical method to evaluate kink deformation. The effects of the number of graphene layers and lattice chirality on the mechanical behaviors of graphite are discussed. The results show that kink deformation occurs in compressed graphite when the strain is approximately 0.02.
Article
Materials Science, Multidisciplinary
Mengying Li, Xiao-Wen Lei
Summary: In this study, the mechanical properties of graphene/aluminum (Gr/Al) composites were investigated using molecular dynamics simulations. The addition of graphene significantly improved the stiffness and strength of the composites by preventing the propagation of dislocations at the interface. The deformation mechanism of the composites, as well as the dislocation movement in the aluminum matrix and the deformation characteristics of graphene, were studied.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Mengying Li, Peng-Fei Xu, Jin-Xing Shi, Xiao-Wen Lei
Summary: Recently, a new defect known as ripplocation has been discovered in layered materials. In this study, the affecting factors in ripplocation deformation of multilayer graphene (MLG) are investigated by combining mechanics and mathematics. Molecular dynamics simulation is performed to generate ripplocation deformation, and the effects of graphene layers and widths on ripplocation boundaries (RBs) are discussed. The study also proposes a mathematical method to evaluate the mean curvature and its relationship with the potential energy of compressed graphene layers. These findings are important for understanding and evaluating corrugated nucleation in layered structures, and can be applied to studying ripplocation deformation in other fields such as soil layers affected by earthquakes.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Agronomy
Guoqiang Li, Yang Yuan, Jiyang Zhou, Rui Cheng, Ruitong Chen, Xianmin Luo, Jinxing Shi, Heyu Wang, Boyang Xu, Youyu Duan, Jinkun Zhong, Xin Wang, Zhongxin Kong, Haiyan Jia, Zhengqiang Ma
Summary: Two loci inhibiting Fhb1 resistance to Fusarium head blight were identified through genome-wide association mapping and validated in biparental populations. These two loci, In1 and In2, are present in all wheat-growing areas worldwide and are of great significance for FHB resistance breeding using Fhb1.
THEORETICAL AND APPLIED GENETICS
(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)
