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Статті в журналах з теми "Multilayer shell"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Szczęch, Marta, and Krzysztof Szczepanowicz. "Polymeric Core-Shell Nanoparticles Prepared by Spontaneous Emulsification Solvent Evaporation and Functionalized by the Layer-by-Layer Method." Nanomaterials 10, no. 3 (2020): 496. http://dx.doi.org/10.3390/nano10030496.

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The aim of our study was to develop a novel method for the preparation of polymeric core-shell nanoparticles loaded with various actives for biomedical applications. Poly(caprolactone) (PCL), poly(lactic acid) (PLA) and poly(lactide-co-glycolide) (PLGA) nanoparticles were prepared using the spontaneous emulsification solvent evaporation (SESE) method. The model active substance, Coumarin-6, was encapsulated into formed polymeric nanoparticles, then they were modified/functionalized by multilayer shells’ formation. Three types of multilayered shells were formed: two types of polyelectrolyte she

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2

BRISCHETTO, SALVATORE. "AN EXACT 3D SOLUTION FOR FREE VIBRATIONS OF MULTILAYERED CROSS-PLY COMPOSITE AND SANDWICH PLATES AND SHELLS." International Journal of Applied Mechanics 06, no. 06 (2014): 1450076. http://dx.doi.org/10.1142/s1758825114500768.

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A 3D free vibration analysis of multilayered structures is proposed. An exact solution is developed for the differential equations of equilibrium written in general orthogonal curvilinear coordinates. The equations consider a geometry for shells without simplifications and allow the analysis of spherical shell panels, cylindrical shell panels, cylindrical closed shells and plates. The method is based on a layer-wise approach, the continuity of displacements and transverse shear/normal stresses is imposed at the interfaces between the layers of the structures. Results are given for multilayered

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3

Sun, Jiabin, Shengbo Zhu, Zhenzhen Tong, Zhenhuan Zhou, and Xinsheng Xu. "Post-buckling analysis of functionally graded multilayer graphene platelet reinforced composite cylindrical shells under axial compression." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2243 (2020): 20200506. http://dx.doi.org/10.1098/rspa.2020.0506.

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Axially compressed composite cylindrical shells can attain multiple bifurcation points in their post-buckling procedure because of the natural transverse deformation restraint provided by their geometry. In this paper, the post-buckling analysis of functionally graded (FG) multilayer graphene platelets reinforced composite (GPLRC) cylindrical shells under axial compression is carried out to investigate the stability of such shells. Rather than the critical buckling limit, the focus of the present study is to obtain convergence post-buckling response curves of axially compressed FG multilayer G

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4

Meish, Yuliia, Maryna Belova, Nataliia Maiborodina, and Viacheslav Gerasymenko. "Determining the effect of longitudinal stiffeners on the deformation of multilayer ellipsoidal shells under non-stationary loads." Eastern-European Journal of Enterprise Technologies 4, no. 7 (130) (2024): 78–88. http://dx.doi.org/10.15587/1729-4061.2024.310241.

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The object of this study is the deformation of multilayer ellipsoidal shells under non-stationary distributed load. It is proposed to reinforce the shell with longitudinal stiffeners to enhance the strength of it. The application of Timoshenko's theory of shells and cores enabled the investigation of the influence of longitudinal stiffeners on the deformation of multilayer ellipsoidal shells under non-stationary loads with the discrete positioning of the stiffeners. A mathematical model of shell oscillations under various types of short-term non-stationary loads was based on the Hamilton-Ostro

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5

Song, Peng Yun, Yang Yong, Wang Zhong, Weng Yu, Ming Fu Hu, and Xiao Qin Zhu. "The Features of the Integrated Multilayer-Wrapped High Pressure Vessel and its Fabrication Quality being Inspected by Hydrostatic Test." Advanced Materials Research 201-203 (February 2011): 1539–43. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1539.

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The integrated multilayer-wrapped high pressure vessel is a special kind of multilayered pressure vessel whose circumferential weld seams are able to be in an offset pattern. The fabrication quality is assured by controlling the gaps of the layers. The tightness of the wrapped layers can be inspected by the hydrostatic test. The stress at the outer shell of a DN1400 urea synthetic reaction tower of the integrated multilayer-wrapped has been measured at the time of the hydrostatic test. The results show that the longitudinal stress is identical to that of the theoretical value, and the ratio of

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6

Zhou, Guo-Jiang, Tao Yu, Yang Zhou, and Li-Guo Wei. "Preparation of spherical LiNi0.5Mn1.5O4 with core-multilayer shells structure by co-precipitation method and long cycle performance." E3S Web of Conferences 213 (2020): 01011. http://dx.doi.org/10.1051/e3sconf/202021301011.

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As a promising cathode material for lithium ion battemensionalry of high voltage, spinel LiNi0.5Mn1.5O4 has attracted interest due to its high discharging voltage at 4.7 V and high energy density of 610 Wh kg-1. In this work, LiNi0.5Mn1.5O4 with a new core-multilayer shells structure (LNMO-900) is synthesized successfully by co-precipitation method and shows a better electrochemical performance. The formation of the core-multilayer shells structure is related to the kirkendall effect, the shell maintains structural stability, and improves long cycle performance. Core-multilayer shells structur

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7

Evstigneev, A. I., V. I. Odinokov, A. V. Sviridov, E. A. Dmitriev, and V. V. Petrov. "Mathematical Modelling of Stress-Strain State of Multilayer Shell Molds." Materials Science Forum 857 (May 2016): 565–72. http://dx.doi.org/10.4028/www.scientific.net/msf.857.565.

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The analysis of the trends for development of technological processes to form shell molds shows that the accuracy and purity of the surface of shaped castings are one of the main criteria for the level of development of the science and technology of foundry engineering. The equations of continuum mechanics and thermal conductivity and the numerical method were used to build a mathematical model of SSS of multilayer shell mold to determine the temperature fields in a shell mold and solidifying casting, thickness of solidified layer of the casting, stress, strain, and displacement of shell layer

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8

Andreev, Vladimir I. "About One Way of Optimization of the Thick-Walled Shells." Applied Mechanics and Materials 166-169 (May 2012): 354–58. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.354.

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Abstract. The paper discusses a method of optimization of thick-walled shells on the basis of the solution of inverse problems theory of elasticity of inhomogeneous bodies. There are discussed the terms of equal-stress and equal-strength structures. The notion of efficiency ratio of equal-strength shell as the ratio of limit loads in heterogeneous and homogeneous shells. Constructed the model of a multilayer shell of polymer concrete for which the coefficient of efficiency is close to 2.

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9

TAKENAKA, H., K. NAGAI, H. ITO, et al. "SOFT X-RAY REFLECTIVITY AND THERMAL STABILITY OF CoCr/C MULTILAYER X-RAY MIRRORS." Surface Review and Letters 09, no. 01 (2002): 593–96. http://dx.doi.org/10.1142/s0218625x02002701.

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The development of highly reflective multilayer mirrors for use in the wavelength region around 6 nm is desired for X-ray photoemission spectroscopy for inner-shell excitation using a Schwarzschild objective. For this application, reflectivity is the most critical parameter determining the performance of multilayer mirrors, because the reflectivity of multilayers in the 6 nm region is generally very low. We have designed CoCr/C multilayer mirrors with a comparatively high reflectivity at around normal incidence and have fabricated them by magnetron sputtering. The measured peak reflectivity is

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10

Alekseev, Gennady V., and Dmitry A. Tereshko. "Optimization method in material bodies cloaking with respect to static physical fields." Journal of Inverse and Ill-posed Problems 27, no. 6 (2019): 845–57. http://dx.doi.org/10.1515/jiip-2018-0084.

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Abstract Inverse problems associated with designing cylindrical DC electrical cloaking shells are studied. Using the optimization method, these inverse problems are reduced to corresponding control problems in which electrical conductivities play the role of passive controls. Admissibility of the optimization method for solving inverse design problems is justified. A numerical algorithm based on the particle swarm optimization is proposed, and the results of numerical experiments are discussed. Optimization analysis shows that high cloaking efficiency of the shell can be achieved either using

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11

Otarbaev, Zh O., S. R. Girnis, K. T. Makashev, and V. T. Stanevich. "The dynamics of a multilayer shell in an elastic space under the influence of a moving periodic load." Bulletin of the National Engineering Academy of the Republic of Kazakhstan 91, no. 1 (2024): 196–205. http://dx.doi.org/10.47533/2024.1606-146x.19.

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The problem of the action on the inner surface of an infinitely long multilayer circular cylindrical shell, uniformly moving along its axis, has been solved. The load acting on the shell is periodic along the axis of the shell. The shell is located in an elastic space (medium) considered in a moving coordinate system linked to the load. The motion of the medium and shell layers is described by the dynamic equations of the theory of elasticity in the Lamé potentials. The method of partial separation of variables is used to solve this problem. The potentials are represented as Fourier-Bessel ser

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12

Krivenko, Olga P., Petro Lizunov, Yurii Vorona, and Oleksandr Kalashnikov. "Modeling of thermo-elastic properties of composite material in stability problems of multilayered shells." Management of Development of Complex Systems, no. 54 (June 2, 2023): 77–89. http://dx.doi.org/10.32347/2412-9933.2023.54.77-89.

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Thin-walled structures, the elements of which are plates and shells made of composite materials, are increasingly used in various industries. The growing needs of practice and the introduction of new composite materials require further improvement of the calculation methods of shell structures of inhomogeneous structure. Therefore, the problem of developing an adequate method of analyzing the behavior of shells made of composite materials with a multilayer structure is relevant. The work is devoted to the application of the developed method of finite elements for the analysis of geometrically

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13

Lizunov, Petro, and Valentyn Nedin. "Numerical study of transmission shafts dynamics in motion modes when the rotation speed changes." Management of Development of Complex Systems, no. 55 (September 25, 2023): 117–22. http://dx.doi.org/10.32347/2412-9933.2023.55.117-122.

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Анотація:

Thin-walled structures, the elements of which are plates and shells made of composite materials, are increasingly used in various industries. The growing needs of practice and the introduction of new composite materials require further improvement of the calculation methods of shell structures of inhomogeneous structure. Therefore, the problem of developing an adequate method of analyzing the behavior of shells made of composite materials with a multilayer structure is relevant. The work is devoted to the application of the developed method of finite elements for the analysis of geometrically

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14

Asselin, Jérémie, Mathieu L. Viger, and Denis Boudreau. "Metal-Enhanced Fluorescence and FRET in Multilayer Core-Shell Nanoparticles." Advances in Chemistry 2014 (June 9, 2014): 1–16. http://dx.doi.org/10.1155/2014/812313.

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In recent years, various methods for the synthesis of fluorescent core-shell nanostructures were developed, optimized, and studied thoroughly in our research group. Metallic cores exhibiting plasmonic properties in the UV and visible regions of the electromagnetic spectrum were used to increase substantially the brightness and stability of organic fluorophores encapsulated in silica shells. Furthermore, the efficiency and range of Förster resonant energy transfer (FRET) between donor and acceptor molecules located in the vicinity of the metallic core was shown to be enhanced. Such multilayer n

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15

Weitao, Zhou, Huang Haitao, Du Shan, Huo Yingdong, He Jianxin, and Cui JianxinShizhong. "Layer-by-Layer Structured Membranes of Silk Fibroin and Polyethylenimine on Electrospun Silk Fibroin Nanofibers." Open Materials Science Journal 8, no. 1 (2014): 81–86. http://dx.doi.org/10.2174/1874088x01408010081.

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Self-assembled silk fibroin (SF)-polyethylenimine (PEI) multilayered films were fabricated on ethanol treated electrospun SF nanofibrous substrates via the electrostatic layer-by-layer (LBL) adsorption. The film coated membranes were characterized using scanning electron microscopy (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectrophotometer (XPS). The SEM images showed that the multilayers of SF-PEI were formed on the surface of the ethanol treated SF nanofibres. The characteristics such as the fiber shape and porous structure were well maintained as the number of t

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16

Valdés, Arantzazu, Carmen Martínez, Mari Carmen Garrigos, and Alfonso Jimenez. "Multilayer Films Based on Poly(lactic acid)/Gelatin Supplemented with Cellulose Nanocrystals and Antioxidant Extract from Almond Shell By-Product and Its Application on Hass Avocado Preservation." Polymers 13, no. 21 (2021): 3615. http://dx.doi.org/10.3390/polym13213615.

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In this work, poly(lactic acid) (PLA)/gelatin/PLA multilayer films supplemented with cellulose nanocrystals and antioxidant extract from almond shell (AS) by-products were developed by solvent casting technique for active food packaging. The almond shell antioxidant extract (ASE) was obtained by microwave-assisted extraction, while cellulose nanocrystals (CNCs) were extracted from AS by a sequential process of alkalization, acetylation and acid hydrolysis. Four formulations were obtained by adding 0 (control), 6 wt.% of ASE (FG/ASE), 4.5 wt.% of CNCs (FG/CNC) and 6 wt.% + 4.5 wt.% of ASE + CNC

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17

Buslenko, A. V., T. V. Bukreeva, A. P. Chistyakov, et al. "Mineralization of Shells of Emulsion Polyelectrolyte Microcapsules by Calcium Carbonate." Кристаллография 68, no. 6 (2023): 1002–8. http://dx.doi.org/10.31857/s0023476123600490.

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The calcium-carbonate-induced mineralization of multilayer shells of emulsion capsules, formed using layer-by-layer assembly of polyelectrolytes, has been investigated. Optimal conditions for forming microcapsules with a core from shea butter and an organic–inorganic shell from synthetic polyelectrolytes and calcium carbonate are found. The shell morphology and stability of capsules in an aqueous suspension upon heating are investigated, and their cytotoxicity for human fibroblast cells is estimated. It is shown that mineralization of emulsion polyelectrolyte capsules by calcium carbonate in t

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18

Livanovich, K., and T. Shutava. "Influence of Chitosan/Dextran Sulfate Layer-by-Layer Shell on Colloidal Properties of Silver Nanoparticles." International Journal of Nanoscience 18, no. 03n04 (2019): 1940077. http://dx.doi.org/10.1142/s0219581x19400775.

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Colloidal stability of core–shell nanoparticles consisted of silver core and chitosan/dextran sulfate multilayer shell in NaCl and CaCl2 solutions was investigated. The critical concentration of coagulation and the Hamaker constant were calculated depending on the number of bilayers in the shell on the nanoparticle surface. The colloidal stability of the core–shell nanoparticles significantly increases with the shell growth.

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19

Meng, Zi-Fei, Xue-Yan Cao, Fu-Ren Ming, A.-Man Zhang, and Bin Wang. "Study on the Pressure Characteristics of Shock Wave Propagating across Multilayer Structures during Underwater Explosion." Shock and Vibration 2019 (January 13, 2019): 1–19. http://dx.doi.org/10.1155/2019/9026214.

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The propagation of the shock wave across multilayer structures during underwater explosion is a very complex physical phenomenon, involving violent fluid-structure interaction (FSI) problems. In this paper, the coupled Eulerian–Lagrangian (CEL) method in AUTODYN is used to simulate the process of shock wave propagation and solve FSI problems. Firstly, the governing equation and the treatment of fluid and structure interface of the CEL method are briefly reviewed. Afterwards, two underwater explosion numerical models are established, and the results are compared with the empirical formula and e

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20

Li, Chuanhao, Mingdong Yi, Gaofeng Wei, and Chonghai Xu. "Synthesis and Mechanical Characterization of a Ti(C,N)/Mo–Co–Ni/CaF2@Al2O3 Self-Lubricating Cermet." Materials 12, no. 23 (2019): 3981. http://dx.doi.org/10.3390/ma12233981.

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In this paper, an Al2O3 coated CaF2 (CaF2@Al2O3) nanocomposite powder is used as the additive phase of a Ti(C,N)-based self-lubricating cermet material. A novel self-lubricating ceramic material with a multilayer core–shell microstructure was prepared using a vacuum hot-pressing sintering process. The results show that the surface of the CaF2 powder is coated with Al2O3, and when introduced into a Ti(C,N)–Mo–Co–Ni material system, it can utilize the high-temperature liquid phase diffusion mechanism of the metal Mo–Co–Ni phase in the sintering process. The CaF2@Al2O3@Mo–Co–Ni multilayer core–sh

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21

Pavliuk, A. V. "Dynamics of Three-layer Cylindrical Shells Elliptical Cross-Section With a Longitudinal-Transverse Discrete Ribbed Filler." Фізика і хімія твердого тіла 18, no. 2 (2017): 243–48. http://dx.doi.org/10.15330/pcss.18.2.243-248.

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In this paper, we consider the equations of non-axisymmetric oscillations of discretely reinforced multilayer cylindrical shells of elliptical section. When analyzing the elements of the elastic structure, a refinement model of the theory of shells and rods of the Timoshenko type is used. The numerical method of solving the dynamic equations is based on the integro- interpolation method of constructing the finite-difference schemes for equations with discontinuous coefficients. The problem of dynamic behavior of a three-layer longitudinal-transversal reinforced cylindrical shell of an elliptic

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22

Lessard-Viger, Mathieu, Maxime Rioux, Luc Rainville, and Denis Boudreau. "FRET Enhancement in Multilayer Core−Shell Nanoparticles." Nano Letters 9, no. 8 (2009): 3066–71. http://dx.doi.org/10.1021/nl901553u.

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23

Mamatov, E. U., and Y. Tashpolotov. "THERMAL EXPANSION OF A MULTILAYER COMPOSITE SHELL." Современные наукоемкие технологии (Modern High Technologies) 1, no. 12 2023 (2023): 46–53. http://dx.doi.org/10.17513/snt.39859.

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24

Gou, Zhong Ru, Wen Jian Weng, Ja Bei Zhou, Pi Yi Du, and Gao Rong Han. "Tailoring of Multilayer Core-Shell Structure for the Controllable Release of Biologically Active Silicon and Strontium Ions." Key Engineering Materials 330-332 (February 2007): 1057–60. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.1057.

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Nanocomposites consisting of biologically active ions, which can enhance cell viability and activate gene expression, are regarded as promising bone regenerative materials. We report a new method for the layer-by-layer (LbL) assembly of biologically active strontium ions in the core-shell Silica@OCP system for an efficient controlled-release. The strontium ions were assembled by using a pH-responsive electrostatic interaction to generate three-dimensional gradients within the silica nanospheres, and then a porous OCP (octacalcium phosphate) shells was coated on the microunits tailored by polye

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25

Bazhenov, Viktor, Olga Krivenko, and Andrii Kozak. "Modal analysis of a complex shell structure under operational loads." Strength of Materials and Theory of Structures, no. 106 (May 24, 2021): 5–13. http://dx.doi.org/10.32347/2410-2547.2021.106.5-13.

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The results of calculation of a complex shell structure under the action of operational loads are presented. A three-section cooling tower, called a three-petal cooling tower, is regarded as a complex-shaped structure. Three variants of loads on the shell are considered: wind pressure, heating and load combination. The design model of a shell of a complex shape is based on the developed universal spatial finite element. The universal spatial finite element allows one to take into account the geometric features of structural elements for a thin shell (constant or varying thickness, knees, ribs,

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26

Sun, Jiabin, Yiwen Ni, Hanyu Gao, Shengbo Zhu, Zhenzhen Tong, and Zhenhuan Zhou. "Torsional Buckling of Functionally Graded Multilayer Graphene Nanoplatelet-Reinforced Cylindrical Shells." International Journal of Structural Stability and Dynamics 20, no. 01 (2019): 2050005. http://dx.doi.org/10.1142/s0219455420500054.

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Exact solutions for the torsional bifurcation buckling of functionally graded (FG) multilayer graphene platelet reinforced composite (GPLRC) cylindrical shells are obtained. Five types of graphene platelets (GPLs) distributions are considered, and a slope factor is introduced to adjust the distribution profile of the GPLs. Within the framework of Donnell’s shell theory and with the aid symplectic mathematics, a set of lower-order Hamiltonian canonical equations are established and solved analytically. Consequently, the critical buckling loads and corresponding buckling mode shapes of the GPLRC

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27

Carrera, Erasmo. "Developments, ideas, and evaluations based upon Reissner’s Mixed Variational Theorem in the modeling of multilayered plates and shells." Applied Mechanics Reviews 54, no. 4 (2001): 301–29. http://dx.doi.org/10.1115/1.1385512.

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This review article is devoted to the use of the Reissner Mixed Variational Theorem (RMVT) forward two-dimensional modeling of flat and curved, multilayer structures. A thorough review of the literature involving the use in the modeling of multilayered plates and shells using RMVT is also presented. In the first part, the paper overviews relevant key points that should be taken into account for an accurate description of strain and stress fields in multilayered plate and shell analysis. It is then shown that RMVT has been originated in view of the fulfillment of such key points, herein referre

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28

Qiu, Qiaohua, Tao Liu, Zhihui Li, and Xinbo Ding. "Facile synthesis of N-halamine-labeled silica–polyacrylamide multilayer core–shell nanoparticles for antibacterial ability." Journal of Materials Chemistry B 3, no. 36 (2015): 7203–12. http://dx.doi.org/10.1039/c5tb00973a.

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Анотація:

Monodisperse multilayer core–shell nanoparticles with an antimicrobial PAM shell and SiO<sub>2</sub> core were fabricated using a layer-by-layer electrostatic self-assembly technique; they exhibited excellent antibacterial activities against Gram-positive bacteria as well as Gram-negative bacteria.

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29

Foroutan, Kamran, and Farshid Torabi. "Influence of Spiral Stiffeners’ Symmetric and Asymmetric Angles on Nonlinear Vibration Responses of Multilayer FG Cylindrical Shells." Symmetry 16, no. 10 (2024): 1318. http://dx.doi.org/10.3390/sym16101318.

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This study utilizes a semi-analytical approach to examine the nonlinear dynamic responses of multilayer functionally graded (MFG) cylindrical shells reinforced by FG spiral stiffeners (FGSSs), which may have symmetric or asymmetric angles, under a thermal condition. It is presumed that the temperature is distributed across the thickness direction. The shell includes three layers: an outer ceramic-rich layer, a middle FG layer, and an inner metal-rich layer. By applying classical shell theory (CST), the smeared stiffeners technique, von Kármán equations, and the Galerkin method, the problem of

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30

Zhou, Yuhua, Yanhu Zhang, Brighton Nyasha Chirukam, et al. "Free Vibration Analyses of Stiffened Functionally Graded Graphene-Reinforced Composite Multilayer Cylindrical Panel." Mathematics 11, no. 17 (2023): 3662. http://dx.doi.org/10.3390/math11173662.

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In this paper, the free vibration response of a stiffened functionally graded graphene nanoplatelet (GPL)-reinforced composite multilayer cylindrical shell panel is studied for the first time. The shell is stiffened by both stringers and rings. Additionally, the effect of reinforcing the shell panel, ring and stinger with GPLs is independently studied. Halpin–Tsai relations are employed to evaluate the mechanical properties of the shell panel, rings and stringers. The first-order shear deformation shell theory, accompanied by the Lekhnitsky smeared stiffener model, using the numerical finite e

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31

Evstigneev, A. I., V. I. Odinokov, A. V. Sviridov, E. A. Dmitriev, and V. V. Petrov. "Theoretical Prediction of Crack Formation in Axisymmetric Multilayer Shell Molds." Materials Science Forum 857 (May 2016): 573–77. http://dx.doi.org/10.4028/www.scientific.net/msf.857.573.

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On the basis of the numerical method, the study has developed a general scheme for solving the problems on stress-strain state of axially symmetric shell molds. The study has developed a mathematical model for the process of casting melting metal into shell molds and hardening of castings. The results of the solution of the problem have showed that stresses of σ22 have the highest values, the stresses of σ11 have order of magnitude smaller values, and the stresses of σ33 vary over time and space like stresses of σ22, but they are 5-10% less in absolute values. The calculations show that the me

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32

Santos, Veronica, João P. Borges, Cláudia M. S. Ranito, et al. "Novel Multilayer Coatings on Polyethylene for Acetabular Devices." Materials Science Forum 514-516 (May 2006): 868–71. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.868.

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Total hip replacement is a common practice in every day clinical work. Artificial hip implants consist of a femoral component and an acetabular component. Nowadays the acetabular component is composed of a polymeric cup and a metallic shell. This study focuses the development of an innovative acetabular component substituting the metallic shell by a multilayer coating on the acetabular cup. A titanium coating was deposited onto ultra-high molecular weight polyethylene (UHMWPE) samples by physical vapour deposition (PVD), having an in situ pretreatment with argon ion bombardment in order to opt

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33

Qin, Xuejun, Jun Yang, Junyi Guan, Zhen Liao, Yanjun Ma, and Dezhi Zhang. "Structural Response of Double-Layer Steel Cylinders under Inside-Explosion Loading." Applied Sciences 13, no. 2 (2023): 709. http://dx.doi.org/10.3390/app13020709.

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The research on the structural response of explosive vessel is an important basis for the design of explosive vessels. Double-layer cylinder structures are widely used in the design of various explosive vessels. This paper studied the deformation of a steel cylindrical shell under internal explosion and proposes a new method for measuring shell deformation by PDV (photonic Doppler velocimetry). We carried out many spherical explosive experiments and obtained useful results that show displacement of the double-layer cylinders and the explosion time. The above process is a simulated LS-DYNA with

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34

Sysoev, E. O., A. Yu Dobryshkin, E. O. Volik, and O. E. Pushkareva. "Influence of the Multilayer Nature of Reinforcement of Open Thin-Walled Cylindrical Carbon Shells on Their Natural Vibrations." IOP Conference Series: Earth and Environmental Science 988, no. 5 (2022): 052067. http://dx.doi.org/10.1088/1755-1315/988/5/052067.

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Abstract In the near future, mega-long-span structures will be required for creating stable microclimate over large areas, regardless of the natural conditions, for comfortable living of people. Thin-walled shell structures made of carbon materials with high strength properties are best suited for this purpose. The problem with thin-walled shells resides in vibrations caused by the action of external forces, which can lead to structural failure. The paper presents and experimental study of influence of the multilayer nature of reinforcement of open thin-walled cylindrical carbon shells on thei

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35

Li, Yuan, and Nitin Chopra. "Fabrication of nanoscale heterostructures comprised of graphene-encapsulated gold nanoparticles and semiconducting quantum dots for photocatalysis." Physical Chemistry Chemical Physics 17, no. 19 (2015): 12881–93. http://dx.doi.org/10.1039/c5cp00928f.

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36

Dong, Hanjiang, and John D. Brennan. "Rapid fabrication of core–shell silica particles using a multilayer-by-multilayer approach." Chem. Commun. 47, no. 4 (2011): 1207–9. http://dx.doi.org/10.1039/c0cc04221h.

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37

Guo, Xiangying, Dameng Liu, Wei Zhang, Lin Sun, and Shuping Chen. "Nonlinear Dynamic Analysis of Macrofiber Composites Laminated Shells." Advances in Materials Science and Engineering 2017 (2017): 1–17. http://dx.doi.org/10.1155/2017/4073591.

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This work presents the nonlinear dynamical analysis of a multilayer d31 piezoelectric macrofiber composite (MFC) laminated shell. The effects of transverse excitations and piezoelectric properties on the dynamic stability of the structure are studied. Firstly, the nonlinear dynamic models of the MFC laminated shell are established. Based on known selected geometrical and material properties of its constituents, the electric field of MFC is presented. The vibration mode-shape functions are obtained according to the boundary conditions, and then the Galerkin method is employed to transform parti

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38

Rahimabady, Mojtaba, Li Lu, and Kui Yao. "Nanocomposite multilayer capacitors comprising BaTiO3@TiO2 and poly(vinylidene fluoride-hexafluoropropylene) for dielectric-based energy storage." Journal of Advanced Dielectrics 04, no. 02 (2014): 1450009. http://dx.doi.org/10.1142/s2010135x1450009x.

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Анотація:

Multilayer dielectric capacitors were fabricated from nanocomposite precursor comprised of BaTiO 3@ TiO 2 core–shell nanosized particles and poly(vinylidene fluoride–hexafluoropropylene) (P(VDF–HFP)) polymer matrix (20 vol%). The multilayer capacitors showed very high discharge speed and high discharged energy density of around 2.5 J/cm3 at its breakdown field (~ 166 MV/m). The energy density of the nanocomposite multilayer capacitors was substantially higher than the energy density of commercially used power capacitors. Low cost, flexible structure, high discharge rate and energy density sugg

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39

Odinokov, V. I., A. I. Evstigneev, E. A. Dmitriev, D. V. Chernyshova, and A. A. Evstigneeva. "Morphological structure of shell mould in investment casting." Izvestiya. Ferrous Metallurgy 65, no. 10 (2022): 740–47. http://dx.doi.org/10.17073/0368-0797-2022-10-740-747.

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The stress state (SS) of multilayer shell mould (SM) is significantly influenced by its morphological structure, its variants, and the connections between the contacting layers. The purpose of this work is to establish the effect of sliding without friction of one of the layers of SS relative to the neighboring contacting layer on SS of the multilayer SM. The process of determining the stress-strain state (SSS) in the SM is modeled when it is filled with steel, in which there is a surface between the layers, where one layer of the SM is completely sliding relative to the adjacent neighboring l

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40

Agapov, Vladimir P., and Alexey S. Markovich. "Investigation of the accuracy and convergence of the results of thin shells analysis using the PRINS program." Structural Mechanics of Engineering Constructions and Buildings 17, no. 6 (2021): 617–27. http://dx.doi.org/10.22363/1815-5235-2021-17-6-617-627.

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Анотація:

The theoretical foundations of compatible finite elements construction for static and dynamic analysis of single-layer and multilayer shells are discussed. These finite elements are implemented in the PRINS computer program. The paper presents verification tests to investigate the accuracy and convergence of the results of calculating various shells using these finite elements. Shell structures are widely used in various fields of technology - construction, mechanical engineering, aircraft construction, shipbuilding, etc. Specialists on the design and calculation of such structures need a reli

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41

Wang, Chaoyang, Shanshan Liu, Xinxing Liu, and Zhen Tong. "Multilayer Shell Walls with Versatile Electron Transfer Properties." Macromolecular Rapid Communications 28, no. 10 (2007): 1167–71. http://dx.doi.org/10.1002/marc.200600871.

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42

Başar, Y., and A. Eckstein. "Large inelastic strain analysis by multilayer shell elements." Acta Mechanica 141, no. 3-4 (2000): 225–52. http://dx.doi.org/10.1007/bf01268679.

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43

Amenzadeh, R. Yu, and E. T. Kiyasbeyli. "Critical time of a long multilayer viscoelastic shell." Mechanics of Composite Materials 43, no. 5 (2007): 419–26. http://dx.doi.org/10.1007/s11029-007-0039-6.

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44

Evdokimov, A. P. "THE BEARING CAPACITY OF THE TORUS-SHAPED RUBBER CORD SHELLS OF THE COUPLING COUPLINGS OF DRIVES WITH TWO MONOLAYERS OF CORD." Spravochnik. Inzhenernyi zhurnal, no. 330 (September 2024): 16–21. https://doi.org/10.14489/hb.2024.09.pp.016-021.

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Анотація:

The article presents the results of comparative experimental studies of multilayer elastic shells with one and two monolayers of cord. The integral characteristics of rubber-cord shells under static loading with torque, axial and radial forces were obtained, which made it possible to determine the damping ability. The value of the torsional force at which a loss of stability occurs was also established. In the dynamic loading mode, the axial and radial forces of the shells are determined depending on the torque. The research results have shown that the use of a rubber-cord shell with two monol

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45

Kuldashov, N. U., A. M. Marasulov, G. G. Yunusov, A. Sh Ruzimov, and T. S. Hojiev. "Stationary stress-strain state of a three-layer viscoelastic cylindrical shell under normal loading." Journal of Physics: Conference Series 2373, no. 2 (2022): 022039. http://dx.doi.org/10.1088/1742-6596/2373/2/022039.

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Abstract Multilayer viscoelastic cylindrical shells have found their wide application in construction, mechanical engineering, aircraft and rocket engineering. The aim of the work is to investigation the reaction of an infinitely long three-layer cylindrical shell to the action of a normal load moving along an axis with a constant to resonant velocity. The paper presents a mathematical formulation of the problem, developed solution methods and obtained numerical results for the problems of stationary deformation of an infinitely long three-layered cylindrical shell under normal loading. The eq

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46

Wan, Hao Chuan, Yi Nong Li, and Ling Zheng. "Vibration Analysis of Rotating Cylindrical Shells." Applied Mechanics and Materials 635-637 (September 2014): 253–56. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.253.

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To simplify the model of rotating cylindrical shell, the static forces are neglected and the vibration equations are established. Transfer matrix method is used to solve the equations and the example shows that the simplified model has little effect on the result. So the simplified model can be used in complex structures such as multilayer and multidiameter shell.

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47

Krivenko, Olga, Petro Lizunov, Yurii Vorona, and Oleksandr Kalashnikov. "Application of the finite element moment scheme to the investigation of thin elastic shells of inhomogeneous structure." Management of Development of Complex Systems, no. 53 (March 17, 2023): 52–62. http://dx.doi.org/10.32347/2412-9933.2023.53.52-62.

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The work is devoted to the problem of developing a universal method for studying the deformation, buckling, postbuckling behavior and vibrations of thin and medium-thickness shells of complex shape and structure under the action of mechanical and thermal loads. A wide class of shells is considered: of constant and smooth-variable thickness, with ribs and cover plates, channels and cavities, holes, sharp bends of the mid-surface, and with a multilayer structure of the material. The method is based on the positions of the 3D geometrically nonlinear theory of thermoelasticity without the use of s

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48

PUI YEE, LOH, LIU CHENMIN, PUA WEICHENG, KAM FONG YU, and CHIN WEE SHONG. "FACILE FABRICATION OF ONE-DIMENSIONAL MULTI-COMPONENT NANOSTRUCTURES USING POROUS ANODIZED ALUMINA MEMBRANE." COSMOS 06, no. 02 (2010): 221–34. http://dx.doi.org/10.1142/s0219607710000577.

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In this short review, we report the facile fabrication of various interesting multi-component nanostructures including arrays of core-shell nanowires, multiwall nanotubes, segmented nanowires and multilayer stacked nanodisks, using anodized alumina membrane (AAM). We demonstrate that metallic (Cu, Ni and Au) and polymeric (PPV and PPy) one-dimensional (1D) arrays can be readily prepared by electrochemical deposition into the AAM. By optimizing the experimental design and conditions, we developed techniques to produce various multi-component nanostructures such as polymer/metal or metal/metal c

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49

Li, Bin, Haoyang Ding, Zhigang Hu, Junya Zhao, Menghui Qi, and Zhiyong Wang. "Simulation Analysis of the Sound Transmission Loss of Composite Laminated Cylindrical Shells with Applied Acoustic Coverings." Shock and Vibration 2022 (May 14, 2022): 1–10. http://dx.doi.org/10.1155/2022/1084738.

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The noise reduction problem of composite laminated cylindrical shells at low and medium frequencies from 150 Hz to 1000 Hz is addressed by using the noise control method of laying acoustic coverings and conducting noise reduction experiments in a cylindrical shell cavity by laying melamine foam, sound-absorbing cotton, and multilayer combination materials and obtaining the corresponding transmission loss curves. Additionally, based on the LMS Virtual Lab acoustic simulation software, finite element models corresponding to the noise reduction experiments are established, and the acoustic cavity

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50

Hafizah, Mas Ayu Elita, Azwar Manaf, Tiara Valency, Andreas Andreas, and Maykel Manawan. "Optimized Carbonization and Kinetic Analysis of Palm Kernel Shell Porous Carbon for Heavy Metal Adsorption." Indonesian Journal of Chemistry 25, no. 3 (2025): 787. https://doi.org/10.22146/ijc.100714.

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This study explores the use of porous carbon derived from palm kernel shells to adsorb lead ions (Pb2+) from water. Porous carbon was produced by carbonizing palm kernel shells at different temperatures (400, 600, and 800 °C) and was evaluated for its effectiveness in a lead chloride (PbCl2) solution. The best adsorption rate, reducing Pb2+ concentration by 27.5%, was observed by carbonized material at 800 °C with a 3 h contact time. Kinetic analysis suggested that the process followed a pseudo-second-order model, indicating that chemical adsorption was the dominant mechanism. The adsorption d

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