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Journal articles on the topic 'Fiberglass shell'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Pustovoitova, O. M., О. А. Gvozdiuk, S. M. Kamchatna, L. V. Trykoz, and A. S. Zvierieva. "RESEARCH OF DEFORMATION AND STRENGTH CHARACTERISTICS OF CONCRETE COLUMNS WITH COMPOSITE REINFORCEMENT." Modern construction and architecture, no. 11 (March 26, 2025): 68–76. https://doi.org/10.31650/2786-6696-2025-11-68-76.

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The article presents the results of experimental studies on the load-bearing capacity of concrete specimens reinforced with a fiberglass shell under axial loading. Cylindrical concrete specimens were reinforced with strip fiberglass reinforcement (SFRP) using a developed winding technology and layer-by-layer bonding with a polymer binder. The main focus is on studying the influence of lateral pressure, created by the fiberglass shell, on the strength and deformation characteristics of concrete. The experiments demonstrated that the use of a fiberglass shell significantly increases the failure

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Paska, Adhi, Yusrizal Yusrizal, Maman Hermawan, and Mochamad Idnillah. "Tensile and Flexural Strength Fiberglass Mixed Green Mussel Shell Powder for Fishing Vessel Size below 5 GT." Journal La Lifesci 6, no. 2 (2025): 118–29. https://doi.org/10.37899/journallalifesci.v6i2.2163.

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Green mussel (Perna viridis) is a marine organism that is widely cultivated and considered a leading commodity in the fisheries sector. The increase in mussel production has resulted in a significant amount of shell waste. Improperly managed mussel shell waste can have a negative impact on the environment. However, green mussel shell waste has great potential for reuse, one of which is as a composite material in fiberglass manufacturing. The high calcium content in mussel shells can serve as an additional reinforcement in fiberglass composites. The wood crisis as a raw material for boat constr

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Avramov, Kostiantyn V., Maryna V. Chernobryvko, Volodymyr V. Kombarov, Sergiy I. Plankovskyy, and Yevgen V. Tsegelnyk. "Deformation of Threaded Metal – Composite Couplings Under the Action of Gas-Dynamic Loads." Journal of Mechanical Engineering 27, no. 4 (2024): 31–39. https://doi.org/10.15407/pmach2024.04.031.

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The combination of metal and composite in threaded couplings increases the reliability of the structure operating under conditions of intensive internal pressure. Strength analysis of threaded metal – composite couplings based on the application of modern finite element modeling methods at the stage of design documentation development allows to create more efficient structures that better meet the operational requirements. The strength of threaded couplings of cylindrical shells made of composite material and metal under the action of gas-dynamic internal pressure is analyzed in this paper. A

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4

Mosiyuk, Victoriya, Sergei Bukharov, and Aleksey Baranov. "Manufacture of Molding Tooling Based on TEIS-53 Heat-Resistant Resin." Key Engineering Materials 910 (February 15, 2022): 351–56. http://dx.doi.org/10.4028/p-st7n2q.

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The present paper considers the manufacturability of polymer composite material tooling intended for molding and bonding of complex curvature honeycomb sandwich structures. The tooling structure consists of inner and outer shells and glass-fiber-reinforced honeycomb core placed between them. The inner shell is glass-fiber-reinforced plastic based on TEIS-53 molten heat-resistant epoxy-bismaleimide resin and Т-10-14 structural fiberglass.

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5

Abdulla, Fadhel Abbas, M. S. Qasim, and Ahmed Ali Farhan Ogaili. "Influence Eggshells powder additive on thermal stress of fiberglass/polyester composite tubes." IOP Conference Series: Earth and Environmental Science 877, no. 1 (2021): 012039. http://dx.doi.org/10.1088/1755-1315/877/1/012039.

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Abstract In this study, the influences of eggshell powder application on random fiberglass/polyester composite pipes thermal stresses were investigated experimentally and numerically. The experimental part involved industrializing tube samples which are Egg Shell Powder with Polyester at 50% volume fraction.(E50), Random Fiberglass with plyester at 50% volume fraction (F50) and Egg Shell Powder with Random Fiberglass with Polyester at 50% volume fraction (E25F25). Resin molding procedure and experimental rig design to study how tube samples are faced with thermal loads. Pipes are made with (95

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6

Shendrik, V. A. "RESEARCH OF GFRP SHELL CONFINED CONCRETE COLUMNS BEHAVIOR UNDER AXIAL COMPRESSION." Russian Journal of Building Construction and Architecture, no. 2(54) (May 11, 2022): 50–60. http://dx.doi.org/10.36622/vstu.2022.54.2.005.

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Statement of the problem. The influence of external GFRP (glass-fiber-reinforced-plastic) shell, with different physicomechanical longitudinal and transverse properties on increasing the strength of the concrete core is investigated.Results. The article presents the results of experimental investigations of the load-bearing capacity to evaluate the effectiveness of using a solid fiberglass outer shell as a reinforcement of a concrete column. The results of the study has allowed us to establish the major factor that significantly affects the load-bearing capacity of a hybrid column with a compo

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Knotek, V., J. Červinka, and Z. Křenková. "Survey and restoration of outdoor glass reinforced polyester sculptures." Koroze a ochrana materialu 63, no. 3 (2019): 130–37. http://dx.doi.org/10.2478/kom-2019-0017.

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Abstract The beginning of the use of polyester resins for artistic work date back to the late 1950s. Initially, resins were supposed to temporarily replace and imitate traditional but more expensive sculptural materials (stone, bronze). Later, original, especially fiberglass works were created, where the laminate formed a shell connected to the internal supporting steel structure. Until now, only part of the exterior works of art made of polyester resins have been survived. Although polyester resins are considered to have good weather resistance, most exterior sculptures exhibit more or less s

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Barry, Christopher D. "CNC Enabled Wood/Metal Composite Construction of (Relatively) High Performance Sailing Yachts." Journal of Sailing Technology 7, no. 01 (2022): 152–85. http://dx.doi.org/10.5957/jst/2022.7.8.152.

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One problem for high performance yachts is to produce a light enough, strong enough structure. Modern fiberglass “composite” construction achieves this, but at substantial cost for the molds so fiberglass is expensive for limited construction. However, “composite” is a combination of any two materials. Before fiberglass, “composite” comprised wood planking over metal framing. Prince Edward’s, (King Edward VII) yacht Britannia was pine over steel and was a very successful racer. This system is used by a few builders of large, mainly “revival” design yachts, but it is feasible for many boat type

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9

Tärno, Ülo A., Ernest Z. Zhukovski, and Olga V. Shevtshenko. "Composite Suspended Shells on Cyclical Plan." International Journal of Space Structures 10, no. 4 (1995): 243–48. http://dx.doi.org/10.1177/026635119501000407.

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The problems connected with the research of rational types of reinforced concrete shell roofs satisfying the demands of city-planning, functional, economic and technological requirements were under investigation during the last decades in TTU and MNIITEP. This paper suggests the use of composite suspended polygonal shells. The structures consist of the curvilinear plates and systems of radial two-level supporting elements. 5 and 12 angle structures were created for the investigations of stress-strain conditions of the complex roofs. The experiments were carried out on fiberglass plastic models

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10

Wang, Zhi Wei, Yan Fu Wang, and Bai Qin. "Analysis of Fiberglass Winding Angle on Natural Frequency of Cylindrical Shell with Symmetric Boundary Conditions." Advanced Materials Research 765-767 (September 2013): 106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.106.

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In order to obtain approximate solution of natural frequencies for the free vibration of anisotropic circular cylindrical shells made of GFRP (glass fiber-reinforced plastic) with symmetric boundary conditions, Loves theory and energy method are used. Computation results show that the fundamental natural frequency comes from different vibration modes while the winding angle varies, the effect of number of axial half waves is stronger than number of circumferential waves on natural frequency of free vibration of anisotropic circular cylindrical shell.

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Cowley, Terry W., and Duane W. Poland. "Repair of a Fiberglass-Reinforced Plastic HCl Storage Tank." Materials Performance 49, no. 12 (2010): 56–59. https://doi.org/10.5006/mp2010_49_12-56.

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A 50-ft (15.2-m) diameter by 36-ft (11-m) high, straight shell, field-erected fiberglass-reinforced plastic tank containing 37% hydrochloric acid (HCl) developed a leak ~18 ft (5.5 m) off the ground. The tank consists of four filament-wound horizontal sections or modules. The leak occurred in a vertical crack at the joint between the second and third modules. This article discusses findings and fabrication issues, and describes repair techniques.

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12

Шендрик, В. А. "Research of Gfrp Shell Confined Concrete Columns Behavior Under Axial Compression." НАУЧНЫЙ ЖУРНАЛ СТРОИТЕЛЬСТВА И АРХИТЕКТУРЫ, no. 3(63) (September 24, 2021): 92–102. http://dx.doi.org/10.36622/vstu.2021.63.3.009.

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Постановка задачи. Исследуется влияние внешних композитных (стеклопластиковых) оболочек, которые имеют различные физико-механические свойства в продольном и поперечном направлениях, на увеличение прочности находящегося внутри оболочек бетонного ядра. Результаты. Представлены результаты экспериментальных исследований несущей способности, позволяющие оценить эффективность применения внешней цельной стеклопластиковой оболочки в качестве усиления бетонной стойки. Результаты исследования позволили определить основной фактор, значительно влияющий на несущую способность гибридной стойки с композитной

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13

Syrunin, M. A., A. G. Fedorenko, and A. G. Ivanov. "Limiting strain in an oriented fiberglass shell on internal explosive loading." Combustion, Explosion, and Shock Waves 28, no. 2 (1992): 190–94. http://dx.doi.org/10.1007/bf00754859.

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14

Eltsov, Timofey, and Tadeusz W. Patzek. "Beyond Carbon Steel: Detecting Wellbore Shape and Cavities, and Cement Imperfections in Cased Wells." Energies 12, no. 21 (2019): 4211. http://dx.doi.org/10.3390/en12214211.

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The non-corrosive, electrically resistive fiberglass casing materials may improve the economics of oil and gas field projects. At moderate temperatures (<120 °C), fiberglass casing is superior to carbon steel casing in applications that involve wet CO2 injection and/or production, such as carbon capture and storage, and CO2-based enhanced oil recovery (EOR) methods. Without a perfect protective cement shell, carbon steel casing in contact with a concentrated formation brine corrodes and the fiberglass casing is superior again. Fiberglass casing enables electromagnetic logging for exploratio

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15

Wang, Zhi Wei, Bo Wu, Yan Fu Wang, and S. M. Bosiakov. "Analysis of Fiberglass Winding Angle on Natural Frequency of Free Vibration of Cylindrical Shell with Asymmetric Boundary Conditions." Applied Mechanics and Materials 274 (January 2013): 65–69. http://dx.doi.org/10.4028/www.scientific.net/amm.274.65.

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In order to obtain approximate solution of natural frequencies for the free vibration of anisotropic circular cylindrical shells made of GFRP (glass fiber-reinforced plastic) with asymmetric boundary conditions, Love’s theory and energy method are used. Computation results show that the fundamental natural frequency comes from different vibration modes while the winding angle varies, the effect of number of axial half waves is stronger than number of circumferential waves on natural frequency of free vibration of anisotropic circular cylindrical shell. The effect of shell’s geometrical paramet

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16

Cruz Jaramillo, Iván Lenín, Víctor Leonardo Samano Guadarrama, and Armando Josué Piña Díaz. "Optimization of helmet shell thickness for motorcycle safety." Ingeniería Investigación y Tecnología 26, no. 1 (2025): 1–8. https://doi.org/10.22201/fi.25940732e.2025.26.1.001.

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Head injuries resulting from motorcycle accidents are a common cause of serious mortality. The most common injuries in motorcycle accidents are: head trauma, brain injuries, spinal cord injuries, facial injuries, neck injuries, and spinal cord injuries. The helmet is a fundamental piece to protect the head during a motorcycle accident. In general, a modern motorcycle helmet is composed of a rigid outer shell made of thermoplastic or fiberglass to decrease the initial impact energy caused by the accident. Using 3D modeling in CAD, the helmet shell is designed, allowing the controlled discretiza

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17

Yankovskii, A. P. "REFINED MODEL OF THERMOELASTIC-PLASTIC DYNAMIC DEFORMATION OF FLEXIBLE REINFORCED CYLINDRICAL SHELLS." PNRPU Mechanics Bulletin, no. 6 (December 15, 2023): 158–69. http://dx.doi.org/10.15593/perm.mech/2023.6.14.

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Within the refined theory of bending, a coupled initial-boundary value problem of thermoelastic- plastic deformation of flexible circular cylindrical shells with arbitrary reinforcement structures is formulated. The tangential displacements of the shell points and the temperature along the thickness of the structures are approximated by high-order polynomials. This makes it possible to take into account, with varying degrees of accuracy, the weak resistance of fibrous sheaths to transverse shear and to calculate wave processes in them. From the obtained two-dimensional equations of the refined

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18

Qin, Yan, Jie Ding, Zhi Xiong Huang, Qi Lin Mei, and Zhi Long Rao. "Microstructure and Oxidation Resistance of Muscovite-Glass Frits Loaded High Silica Cloth/Boron-Containing Phenol-Formaldehyde Resin-Based Ceramifying Composites." Applied Mechanics and Materials 319 (May 2013): 34–38. http://dx.doi.org/10.4028/www.scientific.net/amm.319.34.

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The boron-containing phenol-formaldehyde resin-based ceramifying composites that used muscovite mica and glass frits loaded boron-containing phenol-formaldehyde resin (BPF) as matrix, high silica fiberglass fabric as reinforcements, were pyrolyzed into ceramic gradually in the air. Glass frits were fused into liquid phase and spread to the surface to make muscovite mica form compact mullite ceramic shell. The shell restrained oxygen into the internal effectively in order to reduce the thermo-oxidative degradation of BPF resin. X-ray diffraction analysis (XRD) showed that aluminium borate (Al8B

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Caravaggi, Paolo, Giulia Rogati, Massimiliano Baleani, et al. "Energetics of a Novel 3D-Printed Custom Ankle Foot Orthosis in a Population of Individuals with Foot Drop: A Pilot Study." Applied Sciences 15, no. 11 (2025): 5885. https://doi.org/10.3390/app15115885.

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Passive Dynamic Ankle–Foot Orthoses (PD-AFOs) are medical devices prescribed to individuals with foot drop, a condition characterized by weakness of the ankle dorsiflexor muscles. PD-AFOs can store and release energy during the stance phase of the gait cycle, while supporting the foot in the swing phase. This study aimed at estimating the energetics of a novel fiberglass-reinforced polyamide custom PD-AFO in a population of mild foot drop patients. Eight PD-AFOs were designed and 3D-printed via selective laser sintering for eight participants with a unilateral foot drop condition. Lower limb k

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20

Ghadge, Miss Sahyadri Vikas. "SUITABILITY OF NOISE ABSORBING PANELS BY USING PEANUT SHELL AND COCONUT SHELL." International Scientific Journal of Engineering and Management 04, no. 06 (2025): 1–9. https://doi.org/10.55041/isjem04585.

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Abstract - Now-a-days sound pollution is a major issue. Urbanization, industry, transportation, and public gatherings all contribute to noise pollution, which can cause major health problems like stress, hearing loss, and lost productivity. Traditional sound-absorbing materials, such as fiberglass and polyurethane foam, work well but are bad for the environment since they don't biodegrade. Eco-friendly acoustic panels composed of natural waste peanut and coconut shells with a constant 40% binder are the subject of this investigation. Coconut shells improve mid-frequency absorption and provide

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Миронов, М. Ю., М. В. Цыварев, and А. С. Ветлугина. "Rigidity of the three-layer shell of the boat with different surface shapes of the outer shell." MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg> 2, no. 3(61) (2023): 88–93. http://dx.doi.org/10.37220/mit.2023.61.3.032.

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Для оболочки корпуса шлюпки, представляющей собой «сэндвич» из заполнителя (экструдированного пенополистирола) и стеклопластиковых обечаек сложной формы выполнены экспериментальные замеры перемещений при лабораторном нагружении. Оно задавалось пятном контактного давления в разных зонах резен-киля и на плоских днищевых участках оболочки. Показаны особенности формируемой поверхности оболочки, связанные с используемой технологией. Сравнение результатов расчета твердотельно-оболочечной конечно-элементной модели с результатами эксперимента позволяет выполнить корректировку этой модели, и получить э

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22

Jamal, Qistina Mohd, D. L. Majid, M. Y. Haris, Noorfaizal Yidris, and M. T. H. Sultan. "Quasi Static Analysis of a Biocomposite Aircraft Radome." Applied Mechanics and Materials 629 (October 2014): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amm.629.78.

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<p class="TTPAbstract">This paper investigates the quasi static compression analysis behavior of a biocomposite radome using nonlinear static modeling. Bio-based fiber is proposed to be used in aircraft radome due to its low dielectric constant. In this instance, kenaf was being utilized as the natural fiber to form a hybrid combination of fiberglass/kenaf epoxy laminates. The quasi static behavior was modeled using MDNastran SOL106 Nonlinear Static. The radome was modeled as a hemispherical shell based on Beechcraft’s radome geometric configuration. The radome is designed as a four-laye

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23

Manik, Parlindungan, and Eko Sasmito Hadi. "ANALISA TEKNIS DAN EKONOMIS PENGGUNAAN COREMAT UNTUK KONSTRUKSI FRP (FIBERGLASS REINFORCED PLASTIC) SANDWICH PADA BADAN KAPAL." Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 8, no. 3 (2012): 71–81. http://dx.doi.org/10.14710/kpl.v5i2.3192.

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Planning of ship construction is make its having good effectivity value and efficiency. Composite as material alternative to changes of steel feedstock and wood has many applied named FRP (fiberglass reinforced plastics) single skin. The weakness of this FRP was heavy construction and requires many production time. Therefore, will be checked comparison between single skin with sandwich constructions for shell. In this research, the way for making composite is hand lay up method with three various thickness of skin there are : t, t/2, and t/4. To know strength comparison from the various skin o

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Dzyuba, A. P., V. N. Sirenko, D. V. Klymenko, L. D. Levytina, and D. A. Cherenkov. "Optimization of composite revolution shell by methods of theory of the optimal process." Kosmìčna nauka ì tehnologìâ 26, no. 5 (2020): 28–37. http://dx.doi.org/10.15407/knit2020.05.028.

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We considered the problem of weight optimization of parameters of multi-layer composite shell produced by the method of continuous cross-winding under axisymmetric loading. Shell layers are placed symmetrically relative to the middle surface. The angles of the reinforcing material winding variable along the meridian and the thickness of layers are taken as the variation parameters. We propose an algorithm of the automated determination of the elastic constants of a composite material variable along the shell meridian anisotropy. The connection of the composite structure with the technological

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Шендрик, В. А. "Assessment of the Load-Bearing Capacity of Reinforced Concrete Rack With a Composite Cover of a Constructive Element of Bridge Supports." НАУЧНЫЙ ЖУРНАЛ СТРОИТЕЛЬСТВА И АРХИТЕКТУРЫ, no. 2(62) (June 23, 2021): 86–96. http://dx.doi.org/10.36622/vstu.2021.62.2.007.

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Постановка задачи. Рассматривается задача разработки методики расчета несущей способности гибридных железобетонных стоек, предназначенных для стоечных опор мостовых сооружений с внешними композитными (стеклопластиковыми) оболочками. Результаты. Сформулированы теоретические зависимости для определения напряжений и относительных деформаций конструктивных элементов гибридной стойки в продольном и поперечном направлениях. Разработанные формулы учитывают совместную работу всесторонне сжатого бетонного ядра с анизотропной стеклопластиковой оболочкой, но не учитывают силовое и средовое воздействие не

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Tesei, Alessandra, Piero Guerrini, and Mario Zampolli. "Tank measurements of scattering from a resin-filled fiberglass spherical shell with internal flaws." Journal of the Acoustical Society of America 124, no. 2 (2008): 827–40. http://dx.doi.org/10.1121/1.2945701.

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Bakun, B. M., and H. V. Krechkovska. "Justification of the structural strength of a connection of a steel head and a carbon-plastic pump rod." Physicochemical Mechanics of Materials 60, no. 3 (2024): 72–76. https://doi.org/10.15407/pcmm2024.03.072.

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The peculiarities of the stress-strain state of hybrid sucker rods (with a carbon fiber core and a fiberglass shell) for oil production are considered. The design of the connection of the steel head with the body of the hybrid rod was proposed. The finite element method was used to analyze the stress in the rod elements connection under bending and tensile loading. It was established that the stresses are three times lower than the ultimate strength. The structural design of carbon-plastic rods connection with steel heads is recom¬mended for use in the oil production process.

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Sakr, Mohammed, M. Hesham El Naggar, and Moncef Nehdi. "Novel toe driving for thin-walled piles and performance of fiberglass-reinforced polymer (FRP) pile segments." Canadian Geotechnical Journal 41, no. 2 (2004): 313–25. http://dx.doi.org/10.1139/t03-089.

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Despite the rapidly growing use of pile foundations, it is presently difficult to assure the integrity and uniformity of the cross-sectional area of cast-in-place piles when using normal concrete. Cavities and soil encroachments leading to soil pockets can jeopardize their load-bearing capacity. Moreover, corrosion in reinforced concrete and steel shell piles has been very costly, exceeding US$2 billion in annual repair costs in the United States alone. To address these two challenges, extensive research has been underway at the University of Western Ontario to develop novel technology for the

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Зайцев, Борис Филиппович, Татьяна Владимировна Протасова, Дмитрий Васильевич Клименко, Дмитрий Васильевич Акимов та Владимир Николаевич Сиренко. "ДИНАМИЧЕСКИЙ АНАЛИЗ КОМПОЗИТНОГО ОБТЕКАТЕЛЯ РАКЕТЫ ПРИ ОТДЕЛЕНИИ С УЧЕТОМ РАССЛОЕНИЯ СТРУКТУРЫ". Aerospace technic and technology, № 8 (31 серпня 2020): 19–26. http://dx.doi.org/10.32620/aktt.2020.8.03.

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The dynamic processes in the rocket fairing when the pyrotechnic separation system is triggered are considered. The fairing construction is mixed and includes composite and metal elements. The main composite construction element is a fiberglass shell with regular and irregular winding zones. The speed acceleration required to separate the fairing occurs under the action of impulse pressure from the powder gases in the pyrotechnic system. The displacement of the fairing is made up of displacements of the movement as a rigid whole along its axis and vibrations caused by deformations. The calcula

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Boumedjane, Aissa, Saadi Mohamed, Yahiaoui Djarir, and Noureddine Lahbari. "Numerical modeling of RC column reinforced by new strategy using fiberglass tape and cloth." Journal of Engineering and Exact Sciences 10, no. 4 (2024): 18334. http://dx.doi.org/10.18540/jcecvl10iss4pp18334.

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This paper presents the results of finite element analysis (FE) to study the axial compression behavior of reinforced concrete columns wrapped with tapes and fiberglass cloths according to different techniques using ABAQUS software. In the beginning, columns are modeled as 3D solid elements with a concrete damage plasticity model (CDPM), as the columns in this study are considered to be low compressive strength reinforced concrete and the rebar as 3D mesh elements. And once assembled, the specimen is wrapped with tape and cloth in the form of three-dimensional shell elements. Then, in order to

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Šuba, Oldřich, Ladislav Fojtl, Oldřich Šuba Jr., Libuše Sýkorová, Soňa Rusnáková, and Jitka Baďurová. "On Flexural Stiffness of Polymer Sandwich Walls." Materials Science Forum 862 (August 2016): 115–22. http://dx.doi.org/10.4028/www.scientific.net/msf.862.115.

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This paper deals with the flexural stiffness of sandwich structures based on fiberglass and polymeric foams. The influence of geometrical and material parameters on the resulting effective flexural stiffness of the sandwich structure is being studied experimentally, analytically and using FEM models. The effective elasticity module of the sandwich-structured element is being studied and it’s theoretical and model dependencies on the stiffness of the foam core are being investigated. These dependencies are then compared with experimentally observed values. This study shows it is necessary to pa

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Belov, Vyacheslav, Evilina Galieva, and Roman Verkhovskiy. "Technical and economic assessment of the possibility of using a thermal and moisture protection screen to increase the resistance of the reinforced concrete cooling tower shell to operational conditions." BIO Web of Conferences 107 (2024): 06017. http://dx.doi.org/10.1051/bioconf/202410706017.

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During the operation of chimney-type evaporative cooling towers which are made of monolithic reinforced concrete, the shell is exposed to various aggressive environmental influences and the carried-away part of the recycled process water leading to its premature destruction. This article illustrates a method of protecting the shell tower of a reinforced concrete cooling tower from the aggressive effects of the operating environment using a thermal and moisture protection screen design – a ventilated curtain wall with a cladding of fiberglass sheets. By the finite element method, using the ANSY

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Melo, Jose Daniel Diniz, Ayrles S. Gonçalves Barbosa, and Ricardo Oliveira Guerra. "Mechanical Evaluation of Polymer Composite Hip Protectors." International Journal of Biomaterials 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/431591.

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Hip fractures often result in serious health implications, particularly in the geriatric population, and have been related to long-term morbidity and death. In most cases, these fractures are caused by impact loads in the area of the greater trochanter, which are produced in a fall. This work is aimed at developing hip protectors using composite materials and evaluating their effectiveness in preventing hip fractures under high impact energy (120 J). The hip protectors were developed with an inner layer of energy absorbing soft material and an outer rigid shell of fiberglass-reinforced polymer

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Latifov, F. S., F. A. Seifullaev, and Sh Sh Alyev. "Free vibrations of an anisotropic cylindrical fiberglass shell reinforced by annular ribs and containing fluid flow." Journal of Applied Mechanics and Technical Physics 57, no. 4 (2016): 709–13. http://dx.doi.org/10.1134/s0021894416040155.

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Semenov, A. A. "REFINED DISCRETE METHOD FOR CALCULATING STIFFENED ORTHOTROPIC SHELLS." PNRPU Mechanics Bulletin, no. 4 (December 15, 2022): 90–102. http://dx.doi.org/10.15593/perm.mech/2022.4.09.

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The author proposes a refined discrete method for taking into account stiffeners in the simulationof thin-walled shell structures. According to the method, it is necessary to add different reduction factors along different coordinate axes. For ribs directed perpendicular to the considered direction, a reduction factor is introduced equal to the ratio of the width of the ribs in this direction to the linear size of the shell in the considered direction. This method supplements the previously developed geometrically nonlinear mathematical model, which takes into account transverse shears and mat

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Okokpujie, Imhade P., and Lagouge K. Tartibu. "Aluminum Alloy Reinforced with Agro-Waste, and Eggshell as Viable Material for Wind Turbine Blade to Annex Potential Wind Energy: A Review." Journal of Composites Science 7, no. 4 (2023): 161. http://dx.doi.org/10.3390/jcs7040161.

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The most important part of the wind turbine is the blade. From existing studies, it has been concluded that most wind turbine blades have a high rate of failure during operation due to fatigue, because of a lack of proper material selection processes. Materials such as fiberglass, wood, aluminum, and steel have been used but have not been able to qualify as sustainable materials. Therefore, this study focuses on the review of existing materials employed for developing metal matrix composites as ecological materials to produce wind blades. This study discusses the application of aluminium, sili

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Pan’kov, A. A., and P. V. Pisarev. "Numerical Modeling of Electroelastic Fields in the Surface Piezoelectric Luminescent Optical Fiber Sensor to Diagnose Deformation of Composite Plates." PNRPU Mechanics Bulletin, no. 2 (December 15, 2020): 64–77. http://dx.doi.org/10.15593/perm.mech/2020.2.06.

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We developed a three-dimensional numerical model of a piezoelectric luminescent optical fiber sensor fixed on a composite’s plate. The computational region of the sensor is the optical fiber with two concentric (with 6 sectors) shells of electroluminescent and piezoelectric materials, two control electrodes on interface surfaces, such as optical fiber-electroluminophore and piezoelectric-cover. The external sensor’s cover is made in the form of a semi-elliptic cylindrical polymer shell, which rectangular base is fixed on the surface of the fiberglass plate. In the piezoelectric shell sectors,

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Khashkhozhev, K. N., L. I. Lesnyak, R. M. Kurachev, and A. S. Chepurnenko. "Determination of the bearing capacity of encentrally compressed concrete filled steel tubular columns on the basis of the deformation theory of concrete plasticity." Herald of Dagestan State Technical University. Technical Sciences 49, no. 4 (2023): 182–93. http://dx.doi.org/10.21822/2073-6185-2022-49-4-182-193.

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Objective. The article proposes a method for finite element analysis of pipe-concrete columns in a physically nonlinear setting by reducing a three-dimensional problem to a twodimensional one based on the hypothesis of plane sections.Method.The equations of the theory of plasticity of concrete by G.A. Geniev are used. The technique was tested by comparing the solution with a calculation in a three-dimensional setting in the LIRA-SAPR software package, as well as with the experimental data of A.I. Sagadatov and calculation according to the current Russian design codes for steel-pipe concrete st

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Jelili, Fatma, Michael Beyer, and Uwe Ritschel. "Design, Analysis, and Wind Tunnel Evaluation of Novel Fabric-Covered Rotor Blades in Wind Energy Generation." Journal of Physics: Conference Series 2767, no. 7 (2024): 072020. http://dx.doi.org/10.1088/1742-6596/2767/7/072020.

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Abstract This paper investigates the performance of a novel fabric-covered rotor blade. The study aims to address the need for cost-effective wind turbine blades by exploring the potential of textile-based materials. The research includes a comprehensive wind tunnel experiment to evaluate the aerodynamic response of the fabric-covered blade, compared to a traditional hard-shell blade. The experimental data are systematically processed and corrected for wind tunnel effects, providing valuable insights into the aerodynamic behavior of the novel blade. The results show that the fabric-covered bla

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Sukhomlinov, L. G., and M. V. Shivrin. "The Numerical simulation of composite sandwich cylindrical shells reinforced with circular frames under local loadings." PNRPU Mechanics Bulletin, no. 3 (December 15, 2021): 163–74. http://dx.doi.org/10.15593/perm.mech/2021.3.15.

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The paper considers a woven fabric (based on fiberglass) composite structure in the form of a foam core sandwich cylindrical shell reinforced with circular frames, under the action of local loads applied to the frames. A technique is described for obtaining a numerical solution (with the confirmed reliability) to the problem of the stress-strain state of this type of structure using two alternative computational models, one of which is based on the numerical integration method, and the other one is based on the finite element method. The first model is developed by adopting a scheme, in which

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Bay, Phung, Ngo Anh Tuan, and Nguyen Van Minh. "Effects of microalgae and stocking density on growth and survival rate of giant clam (Tridacna squamosa Lamarck, 1819) larvae." IOP Conference Series: Earth and Environmental Science 1278, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1755-1315/1278/1/012002.

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Abstract The present study aimed to evaluate the impact of microalgae mixture and stocking density on growth and survival rate of giant clam (Tridacna squamosa) at the veliger stage. In the first experiment, giant clam larvae of the D-stage were reared in the conical fiberglass tanks and fed with combinations of microalgae, including Chaetoceros muelleri and Isochrysis galbana (1:1), and C. muelleri, I. galbana and Nannochloropsis oculata, (1:1:1). One group of giant clam larvae without feeding was used as a control. The experiment was lasted for 7 days, until the Pediveliger stage with six re

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Baranenko, Valerii, and Denys Volchok. "Application of various uncertainty measures in the problem of critical force searching for orthotropic shell in conditions of the carrying capacity." Strength of Materials and Theory of Structures, no. 106 (May 24, 2021): 201–20. http://dx.doi.org/10.32347/2410-2547.2021.106.201-220.

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The questions of measures calculation of events containing uncertain quantities of random, fuzzy and rough nature are considered. The algorithms of determination of measures of events, based on methods of statistical simulation, are proposed. The "chances" of realization an uncertain event - the simultaneous fulfillment of the conditions of the bearing capacity of a cylindrical orthotropic shell compressed by an axial force, which can be presented in a random, fuzzy or rough manner, are investigated. The stochastic uncertainty is given by the distribution density of the random variable. Fuzzy

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Zhang, Zi Peng, Gui Fan Zhao, Tso Liang Teng, and Yang Wang. "Analysis and Application of the Impact Absorption Behavior of the Composite Tube." Applied Mechanics and Materials 470 (December 2013): 510–15. http://dx.doi.org/10.4028/www.scientific.net/amm.470.510.

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Composite tube is one new kind of multi-material shell structures. It has both of metal and composite energy absorption advantage. In order to find the energy absorption characteristic of composite tube and put it into use, the Drop-Weight Tear Test (DWTT) was carried out. The LD2Y aluminum was chosen as the inner metal material which was wrapped fiberglass epoxy composite outside. During the test, the displacement signal and velocity signal, acceleration signal were got by piezoelectric acceleration transducer. Furthermore, the DWTT test of the composite tube was simulated in LS-DYNA, and pro

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Proroka, Vladislav Arkadiyovych, and Vladimir Ivanovich Lypovskyi. "PROSPECTS OF ANISOGRID LATTICE STRUCTURES USING IN ADAPTERS OF LAUNCH VEHICLE." Journal of Rocket-Space Technology 27, no. 4 (2019): 25–34. http://dx.doi.org/10.15421/451905.

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The efficiency of using anisogrid lattice structures in launch vehicle designs, in particular in payload adapters, is investigated. On a specific example of the design of the adapter, which is in operation, it is compared with an anisogrid adapter, which is made of different materials - composite, made by winding, and metal using additive technologies. The performance of the adapter was evaluated by the criterion of minimum mass, subject to the requirements of strength and stability. The initial geometric parameters of the anisogrid lattice structure were determined under the condition that th

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Widianto, Tri Nugroho, and Ahmat Fauzi. "Disain dan Kinerja Sistem Air Laut yang Direfrigerasi (ALREF) untuk Penampung Ikan pada Kapal Nelayan 10-15 GT." Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan 13, no. 2 (2018): 165. http://dx.doi.org/10.15578/jpbkp.v13i2.517.

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Sistem ALREF (air laut yang direfrigerasi) untuk penyimpanan ikan pada kapal 10-15 GT telah didisain dan diuji. Penelitian ini dilakukan melalui tahapan: penentuan kriteria disain, pembuatan konsep dan analisis disain, konstruksi dan pengujian. Kriteria disain ditentukan berdasarkan referensi kapal 10-15 GT di Pelabuhan Perikanan Pantai Sadeng Gunung Kidul, Yogyakarta. Bak penyimpan ikan dilengkapi pendingin sistem kompresi uap yang terdiri dari komponen utama berupa evaporator, kondensor, kompresor, palka, refrigerant dan katup ekspansi. Palka terbuat dari fiberglass dengan volume palka sekit

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Chepurnenko, Anton, Batyr Yazyev, Besarion Meskhi, Alexey Beskopylny, Kazbek Khashkhozhev, and Viacheslav Chepurnenko. "Simplified 2D Finite Element Model for Calculation of the Bearing Capacity of Eccentrically Compressed Concrete-Filled Steel Tubular Columns." Applied Sciences 11, no. 24 (2021): 11645. http://dx.doi.org/10.3390/app112411645.

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Concrete-filled steel tubular (CFST) columns are widely used in construction due to effective resistance to compression and bending joint action. However, currently, there is no generally accepted effective calculation method considering both nonlinearities of the materials and lateral compression. The article proposes the finite element analysis method of concrete-filled steel tubular columns in a physically nonlinear formulation by reducing a three-dimensional problem to a two-dimensional one based on the hypothesis of plane sections. The equations of Geniev’s concrete theory of plasticity a

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Kozák, Emese, Ádám Gégény, Ferenc Zombori, Sándor Forrai, and István Péter Szabó. "Eco-marathon racing car casing and frame structure design." IOP Conference Series: Materials Science and Engineering 1237, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1757-899x/1237/1/012010.

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Abstract In addition to the Pneumobil competition, our team will also participate in the Shell Eco-marathon with an electric-powered prototype category car. Based on our results so far, we are in the midfield of European competitions. After several modifications to our current car, we will be building a new car again in 2022. The goal of building eco-marathon racing cars is to achieve the lowest possible energy consumption, and accordingly, great emphasis should be placed on reducing weight and drag coefficient. Our previous cars used a welded aluminum frame and fiberglass. One of the best way

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De Cicco, Davide, and Farid Taheri. "Robust numerical approaches for simulating the buckling response of 3D fiber-metal laminates under axial impact – Validation with experimental results." Journal of Sandwich Structures & Materials 22, no. 5 (2018): 1564–93. http://dx.doi.org/10.1177/1099636218789614.

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The reliability and efficiency of three different numerical modeling approaches for simulating the response of a newly developed 3D fiber-metal laminate (3D-FML), subject to axial impact loading, are considered in this paper. The main objective of the study is to establish the most robust numerical framework for analyzing the performance of such complexly configured hybrid materials subject to axial impact loading in a fairly accurate, yet efficient manner. LS-DYNA finite element software is used for the purpose. The models include: (i) a full 3D solid model, where all 3D-FML constituents are

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Hashish, Mohamed, and Paul L. Miller. "Cutting With High-Pressure Ammonia Jets for Demilitarization of Chemical Weapons." Journal of Pressure Vessel Technology 124, no. 4 (2002): 487–92. http://dx.doi.org/10.1115/1.1400755.

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This paper presents a study on using high-pressure ammonia and abrasive ammonia jets for cutting and washout of chemical weapons. The work focused on chemical rocket M55 simulants. A test chamber was built to cut M60 training and M61 practice rockets at Redstone Arsenal by Teledyne-Commodore who developed a complete destruction process using alkali metals dissolved in anhydrous ammonia to form the aggressive solvated electron technology (SET™) solution. The rocket is loaded in a rotary chuck and stationary cutting/piercing nozzles were used to cut and drill through the rocket. This approach wa

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Aboelseoud, Mohamed A., and John J. Myers. "Flexural Behavior of Hybrid Composite Beam (HCB) Bridges." Advances in Materials Science and Engineering 2019 (March 3, 2019): 1–13. http://dx.doi.org/10.1155/2019/1690512.

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A new hybrid composite beam (HCB) has recently been used in the construction of three bridges in Missouri, USA. HCB consists of self-consolidating concrete (SCC) that is poured into classical arch shape and tied at the ends by steel tendons. Both the concrete and the steel are tucked inside a durable fiberglass shell, and the voids are filled with polyiso foam. This paper aims to examine the flexural behavior of an in-service HCB, evaluate the current methodology and assumptions, and propose modifications to that methodology. To achieve these goals, the strains induced in HCB elements due to d

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