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Article
Materials Science, Multidisciplinary
M. Avey et al.
Summary: This study investigates the thermoelastic stability of carbon nanotube (CNT) patterned composite conical shells using the shear deformation theory (ST). Two different boundary value problems are considered, depending on whether material properties are temperature independent or dependent. The study derives the basic equations for CNT patterned truncated conical shells using the modified Donnell-type shell theory and applies the Galerkin method to find the critical temperature and critical axial load expressions. The effects of CNT patterns, volume fraction, radius-to-thickness and length-to-thickness ratios, as well as the half-peak angle on critical parameters within the ST are estimated by comparison with classical shell theory (CT).
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Zhicheng Yang et al.
Summary: This paper investigates the thermomechanical in-plane dynamic instability of asymmetric restrained functionally graded graphene reinforced composite (FG-GRC) arches with power law distribution of graphene sheets with atom vacancy defects. The temperature-dependent mechanical properties are determined by a genetic programming assisted micromechanical model. The governing equations for the thermomechanical in-plane dynamic instability are derived by Hamilton's principle and solved by differential quadrature method (DQM) in conjunction with Bolotin method. Numerical studies examine the effects of vacancy defect, graded distribution of graphene, temperature variation, load position, and boundary conditions on the free vibration, elastic buckling, and dynamic instability behaviors of the FG-GRC arch. Results show that the FG-GRC arch's structural performance is weakened by graphene defect and temperature rise, and is significantly influenced by both graphene distribution and boundary conditions.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
B. Tomczyk et al.
Summary: This paper introduces a new averaged mathematical model for analyzing selected dynamic thermoelasticity problems for thin linearly thermoelastic Kirchhoff-Love-type circular cylindrical shells with a periodically microheterogeneous structure. The proposed model, called the combined asymptotic-tolerance model, is derived by using a combination of consistent asymptotic and non-asymptotic tolerance modeling techniques. The starting equations are the well-known governing equations of linear Kirchhoff-Love theory of thin elastic cylindrical shells, combined with Duhamel-Neumann thermoelastic constitutive relations and the linearized Fourier heat conduction equation. For periodic shells, the starting equations have highly oscillating, discontinuous, and periodic coefficients, while the equations of the proposed model have constant coefficients dependent on a cell size.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Sumeet Chakraborty et al.
Summary: This article investigates the stability of CNT reinforced composite (CNTRC) sandwich shell panels with softcore material. The face sheets of the shell panels are strengthened with functionally graded nanotube particles. The effective properties of CNTRC face sheets are determined using the rule of mixture technique, and the stability phenomena are examined using a multi-layer approach. The material properties are temperature-dependent, and the core compressibility effect is accounted for. The governing equations and nonlinear responses are obtained to analyze the influence of CNT gradation, volume fractions, and core thickness on the stability behavior of CNTRC sandwich shell panels.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Mechanical
Licai Yang
Summary: This paper focuses on the buckling problem of cylindrical shells under combined non-uniform axial compression and external pressure. A new method called two-parameter perturbation method is established to obtain buckling loads. Comparative studies show that buckling loads by the analytical formulas coincide with those for combined uniform loads or single wind load in literatures. The obtained results in this paper can be applied to evaluate buckling loads for cylinders subjected to combined non-uniform loads in actual engineering.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Mathematics, Applied
Dang Thuy Dong et al.
Summary: The paper presents an analytical approach to study the post-buckling behavior of torsionally loaded sandwich carbon nanotube reinforced cylindrical shells with an auxetic core. Three layers of external and internal CNT reinforced layers and an auxetic lattice core are considered. The effects of different factors on the torsional buckling behavior are examined and discussed, including the carbon nanotube reinforced layers, the auxetic core layer, and the volume fraction of carbon nanotube.
ADVANCES IN APPLIED MATHEMATICS AND MECHANICS
(2023)
Article
Mechanics
Sumodh Kumar et al.
Summary: Experimental and numerical investigations were conducted to study the buckling and vibration of 3D printed functionalized MWCNTs/HDPE based nanocomposites (NCs) and their functionally graded nanocomposites (FGNCs). The critical buckling load (Pcr) was computed using modified Budiansky criteria (MBC) and double tangent method (DTM). It was found that Pcr of the NCs and FGNCs increased with the content of functionalized MWCNTs. The natural frequency of the NCs and FGNCs also increased with the functionalized MWCNTs loading. The highest Pcr and natural frequency were observed for the H5 and FGNC-2 prints.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Shivaan Anashpaul et al.
Summary: This study focuses on minimizing the weight of a three-phase, glass and carbon nanotubes reinforced angle-ply laminate while meeting a fundamental frequency constraint. The optimal distributions of the fibers and CNTs, stacking sequence, ply angles, and ply thicknesses are considered as design variables. The research reveals that placing fiber and CNT reinforcements close to or in the outer layers is the most effective, and CNT reinforcement affects the optimal values of ply angles due to the reduced directional properties of fibers when the matrix is reinforced by CNTs.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Ravi Kumar et al.
Summary: In this study, a C0 finite element model based on modified third-order shear deformation theory is used along with deep neural networks, extreme gradient boosting, and random forest models to predict the critical buckling load of a carbon nanotube-reinforced hybrid functionally graded plate structure. The finite element model is validated and found suitable for finding new results. A regression problem is expressed using machine learning methods to predict the buckling response of the CNT-reinforced hybrid FG plates, using random values of the material's elastic properties as input parameters.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Abdullah H. Sofiyev et al.
Article
Engineering, Multidisciplinary
A. H. Sofiyev et al.
Summary: The study investigates the buckling analysis of Carbon-Carbon composites reinforced with Carbon Nanotubes under hydrostatic pressure and axial compression on a two-parameter elastic foundation. By deriving governing equations and using an extended mixing rule, the study examines the effects of different CNT distributions on material properties, solves stability equations numerically, and conducts a parametric study to explore the influences of foundation parameters, CNT volume fraction, and reinforcement types on combined buckling loads.
DEFENCE TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Aman Yadav et al.
Summary: Functionalization of graphene improves the mechanical properties of epoxy-based nanocomposites. Molecular dynamics simulations show that the addition of carboxyl functionalized graphene improves properties such as elastic modulus and shear modulus. The simulation results are consistent with experimental data.
JOURNAL OF MOLECULAR MODELING
(2022)
Article
Engineering, Civil
Guangxin Sun et al.
Summary: In this study, the post-buckling behavior of composite porous cylindrical shells under axial compression and hydrostatic pressure is investigated using the moderately thick shell theory. The accuracy of the solutions is validated by comparing them with existing theoretical and experimental data. The study reveals that the geometry and material properties significantly affect the post-buckling behavior and knockdown factor of the cylindrical shell, and also explains and discusses the discrepancies between the classical thin-walled shell theory and the moderately thick shell theory.
THIN-WALLED STRUCTURES
(2022)
Article
Mathematics
Mahmure Avey et al.
Summary: This study aims to mathematically model the thermoelastic stability of cylindrical shells reinforced with carbon nanotubes (CNTs) and evaluate the effects of CNT patterns, volume fraction, and geometric parameters on the critical temperature by comparing with classical theory.
Article
Mathematics, Applied
Cheng Li et al.
Summary: This study investigates the nonlinear in-plane instability of functionally graded carbon nanotube reinforced composite (FG-CNTRC) shallow circular arches with rotational constraints subjected to a uniform radial load in a thermal environment. By assuming arches with thickness-graded material properties and considering four different distribution patterns of carbon nanotubes (CNTs), the arch displacement field is evaluated using the classical arch theory and Donnell's shallow shell theory assumptions. Analytical solutions for buckling equilibrium equations and buckling loads are obtained using the principle of virtual work. Parametric studies are conducted to demonstrate the effects of temperature variations, material parameters, geometric parameters, and elastic constraints on the stability of the arch. The results show that increasing the volume fraction of CNTs and distributing them away from the neutral axis significantly enhance the bending stiffness of the arch. Additionally, the pretension and initial displacement caused by the temperature field have significant effects on the buckling behavior.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Engineering, Mechanical
Dhaval A. Vartak et al.
Summary: This paper presents potential applications of Nanofiller composites for space payload components, and discusses the challenges and requirements for space applications as well as space qualification.
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
F. Cornacchia et al.
Summary: The study investigates vibrations and buckling of Kirchhoff nano plates using second-order strain gradient theory. Different boundary conditions, stacking sequences, geometries, and material properties are considered, with numerical simulations discussing the effects of plate aspect ratio and non-local ratio. A comparison with classical analytical solutions is provided for buckling loads and fundamental frequencies whenever possible.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Giovanni Tocci Monaco et al.
Summary: This work presents an analytical method for studying the vibrations and buckling behavior of nano-plates in a hygro-thermal environment. Nonlinear von Karman terms and strain gradient nonlocal theory are included in the analysis to consider the effects of nano-scale on magneto-electro-elastic plates, along with critical temperatures for vibrations and buckling problems under hygro-thermal loads.
Article
Mathematics
Giovanni Tocci Monaco et al.
Summary: A trigonometric approach is developed in this study for investigating smart composite nanoplates using a strain gradient nonlocal procedure. Convergence of the method is reported in terms of displacements and electro-magnetic potentials, with results showing agreement with literature and potential for further developments in this field.
Article
Materials Science, Composites
Lin-Shiang Su et al.
Summary: The study fabricated nanocomposites with aligned graphene platelets by incorporating them into an epoxy matrix through mechanical mixing and sonication, followed by applying an electric field to align the platelets before curing. Experimental results showed that the nanocomposites with aligned graphene exhibited higher tensile moduli and strength compared to those with randomly oriented graphene. In addition, nanocomposites with functionalized graphene showed superior interfacial and mechanical properties when compared to those with reduced graphene oxide.
POLYMER COMPOSITES
(2021)
Review
Polymer Science
Norizan Mohd Nurazzi et al.
Summary: This article introduces the current research status and application prospects of a novel class of nanomaterials composed of carbon nanotubes, emphasizing the potential uses of CNT-reinforced polymer composites in multiple fields. The article also reviews the research on CNT-reinforced polymer composites under current covalent and non-covalent functionalization, and discusses the mechanisms related to mechanical, thermal, and electrical performance.
Article
Chemistry, Multidisciplinary
Abdullah H. Sofiyev et al.
Article
Mechanics
Nicholas Fantuzzi et al.
COMPOSITE STRUCTURES
(2020)
Article
Materials Science, Composites
Pham Thanh Hieu et al.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2019)
Article
Engineering, Civil
A. Hajlaoui et al.
THIN-WALLED STRUCTURES
(2019)
Article
Materials Science, Composites
Paul A. Praveen et al.
POLYMER COMPOSITES
(2018)
Article
Engineering, Mechanical
Hui-Shen Shen et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2017)
Review
Polymer Science
Sanaa Meer et al.
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
(2016)
Article
Jun-Qiang Lu et al.
Journal of Computational and Theoretical Nanoscience
(2016)
Article
Engineering, Multidisciplinary
Hui-Shen Shen et al.
COMPOSITES PART B-ENGINEERING
(2013)
Article
Materials Science, Composites
B. K. Lim et al.
JOURNAL OF COMPOSITE MATERIALS
(2012)
Article
Mechanics
Hui-Shen Shen
COMPOSITE STRUCTURES
(2011)
Article
Mechanics
Hui-Shen Shen
COMPOSITE STRUCTURES
(2011)
Article
Chemistry, Physical
Dongyu Cai et al.
JOURNAL OF MATERIALS CHEMISTRY
(2010)
Article
Mechanics
A. H. Sofiyev
MECHANICS RESEARCH COMMUNICATIONS
(2010)
Article
Mechanics
Azam Tafreshi et al.
COMPOSITE STRUCTURES
(2007)
Review
Chemistry, Physical
Takuya Hayashi et al.
Article
Materials Science, Composites
Kohji Suzuki et al.
JOURNAL OF COMPOSITE MATERIALS
(2007)
Article
Materials Science, Multidisciplinary
Yue Han et al.
COMPUTATIONAL MATERIALS SCIENCE
(2007)
Article
Engineering, Manufacturing
YS Xu et al.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2006)
Article
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HS Shen et al.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2005)
Review
Engineering, Mechanical
MF Yu
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2004)
Article
Engineering, Multidisciplinary
M Griebel et al.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2004)
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TA Winterstetter et al.
THIN-WALLED STRUCTURES
(2002)
