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Journal articles on the topic 'Monocoque'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

SKOVAJSA, MICHAL, ROMAN KROFT, and FRANTISEK SEDLACEK. "NUMERICAL AND EXPERIMENTAL MODAL ANALYSIS OF A CARBON FIBRE MONOCOQUE." MM Science Journal 2021, no. 2 (June 2, 2021): 4371–75. http://dx.doi.org/10.17973/mmsj.2021_6_2021048.

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This paper deals with the comparison of experimental measurements and numerical simulation of the natural frequency and natural shape of a carbon fibre monocoque. This comparison is used to validate the numerical analysis with a real monocoque. Usually, monocoques consist of orthotropic materials like carbon fibre sandwich with a honeycomb core. The monocoque is manufactured by hand from several layers of different materials, which are connected by glued joints. This does not guarantee the material properties or the same mass the idealized numerical simulation.

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2

Singhanart, Thanyarat, Kulanun Chutisemachai, Kiatnathee Dilokthonsakun, Jintasarn Sanchai, and Kasemphan Siriployngam. "On the Use of Composite-Steel Joint for Semi-Monocoque Frame Design." Applied Mechanics and Materials 619 (August 2014): 23–27. http://dx.doi.org/10.4028/www.scientific.net/amm.619.23.

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The design of semi-monocoque frame by using the composite-steel joint is considered in this paper. The frame is designed with weight less than 30kg and torsional stiffness more than 1200 Nm/deg. In order to design the semi-monocoque frame, the analysis of the composite-steel joint has to be clearly investigated. Therefore, the stress analysis of composite-steel joint is performed and then the frame is designed. The double lab joint with two holes is tested and verified by the experiments. The carbon-fiber fabric laminated with the KEVLAR fabric composite laminate is used for composite part. From experiments, the joint’s strength can be increased by using the eccentric holes. Therefore, in order to meet the requirement of the SAE rules; load capacity more than 30 kN, the eccentric hole double lap joint is numerically designed and applied to semi-monocoque frame. The joint has strength of 32 kN and can be used in frame design. The semi-monocoque frame is designed and analyzed by finite element analysis. The maximum stress at maximum load is 208 MPa which is less than the yield strength of the materials so it can withstand the loads, the mass is 29.6kg, and the torsional stiffness of the frame is 1408 Nm/degree. Therefore, the semi-monocoque frame can be successfully designed.

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Zoppke, Hartmut, Matthias Scherer, Matthias Braband, and Alexander Dietz. "Leichtbau-Pkw mit naturfaserverstärktem Monocoque." ATZ - Automobiltechnische Zeitschrift 122, no. 7-8 (July 2020): 74–78. http://dx.doi.org/10.1007/s35148-020-0277-7.

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4

Bulgu, Chala Jembere. "Design a Space Frame Chassis for Light Weight Automobiles for Improved Safety and Reliability." Mechanical Engineering Research 9, no. 2 (January 31, 2020): 36. http://dx.doi.org/10.5539/mer.v9n2p36.

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The objective of this research is to design a spaceframe chassis for light weight automobiles possessing unladen weight of ≤ 550Kg to replace the conventional monocoque type chassis frame. The maximum stress and maximum deflection that the chassis can resist without fracturing are important criteria. In this thesis, the existing monocoque chassis was considered and analyzed under static loading, frontal impact, side impact, rear impact, front rollover and side rollover loading conditions by using Finite Element Analysis method. Then, taking the test results as a reference, a spaceframe chassis was designed for the same size vehicle. The critical evaluation standard points stated in the Federal Motor Vehicle Safety Standard (FMVSS), U.S.A standard, were used as guideline to see the performance of the existing and the new chassis frames. The test results show that a space frame chassis has better stress resisting capacity and reliability than the conventional monocoque chassis frame under all impacts.

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Fragassa, Cristiano, Giangiacomo Minak, and Mauro Sassatelli. "Reducing defects in composite monocoque frames." FME Transactions 47, no. 1 (2019): 48–53. http://dx.doi.org/10.5937/fmet1901048f.

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6

Chang, C. K., and J. H. Cheng. "Optimization of Sandwich Monocoque Car Body with Equivalent Shell Element." Journal of Mechanics 23, no. 4 (December 2007): 381–88. http://dx.doi.org/10.1017/s172771910000143x.

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AbstractThis research proposes a straightforward and efficient method to optimize a sandwich monocoque car body with the developed equivalent shell element based on stiffness equivalence. The fact that stiffness rather than strength is dominant constraint for ordinary car body optimization is demonstrated. A simple but heavy flat chassis plate is utilized as upper bound, while an ideal monocoque is used as lower bound for an actual car body optimization. Convergence hours can be significantly reduced with the equivalent element and the initial-bounded method. A novel electric car body optimization is presented, fulfilling UltraLight Steel Auto Body (ULSAB) stiffness requirements and showing similar optimal weight results as a conventional approach with a much lower analysis time cost.

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7

Лозбинев, Владимир, and Vladimir Lozbinev. "Analysis of factors providing efficiency of load-bearing elements of the car body." Bulletin of Bryansk state technical university 2015, no. 3 (September 30, 2015): 52–56. http://dx.doi.org/10.12737/22992.

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The factors that determine the performance monocoque cars. New approaches to the evaluation of the stress state of car bodies, the stability of load-bearing elements. The importance of assessing the survivability of bearing elements.

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8

Barygin, Valery V. "Digital Technologies for Aerospace Industry Products." AEROSPACE SPHERE JOURNAL, no. 2 (June 26, 2021): 76–83. http://dx.doi.org/10.30981/2587-7992-2020-107-2-76-83.

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The creation of new generations of products in the aerospace industry is possible by applying a fundamentally new method of designing and manufacturing solid metal multilayer monocoque. A new additive manufacturing technology based on Russian patents is proposed.

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9

Alonso, L., C. Bedoya, B. Lauret, and F. Alonso. "F²TE³: a Transparent Semi-Monocoque VIP Envelope." Applied Mechanics and Materials 71-78 (July 2011): 594–97. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.594.

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This article examines a new lightweight, slim, high energy efficient, light-transmitting, self-supporting envelope system, providing for seamless, free-form designs for use in architectural projects. The system exploits vacuum insulation panel technology. The research was based on envelope components already existing on the market and patents and prototypes built by independent laboratories, especially components implemented with silica gel insulation, as this is the most effective transparent thermal insulation there is today. The tests run on these materials revealed that there is not one that has all the features required of the new envelope model, although some do have properties that could be exploited to generate this envelope, namely, the vacuum chamber of vacuum insulation panels, the use of monolithic aerogel as insulation in some prototypes, and reinforced polyester barriers. These three design components have been combined and tested to design a new, variable geometry, energy-saving envelope system that also solves many of the problems that other studies ascribe to the use of vacuum insulation panels.

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10

Keolian, Robert M., Kevin J. Bastyr, Ray S. Wakeland, and John F. Brady. "Monocoque shell and tube heat exchanger for thermoacoustics." Journal of the Acoustical Society of America 144, no. 3 (September 2018): 1712. http://dx.doi.org/10.1121/1.5067595.

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11

Kanketr, Tatthep, Ekkarin Phongphinnittana, and Baramee Patamaprohm. "Design of a CFRP composite monocoque: simulation approach." IOP Conference Series: Materials Science and Engineering 501 (April 9, 2019): 012014. http://dx.doi.org/10.1088/1757-899x/501/1/012014.

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12

Zoppke, Hartmut, Matthias Scherer, Matthias Braband, and Alexander Dietz. "Lightweight Passenger Car with Natural Fiber Reinforced Monocoque." ATZ worldwide 122, no. 7-8 (July 2020): 70–74. http://dx.doi.org/10.1007/s38311-020-0255-4.

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13

Ye, Pengxiang, Wencan Zhou, and Chaohui Zhao. "Design and Lightweight based on FSC racing monocoque." Journal of Physics: Conference Series 1885, no. 5 (April 1, 2021): 052031. http://dx.doi.org/10.1088/1742-6596/1885/5/052031.

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14

Kunakorn-ong, Pathawee, Kitchanon Ruangjirakit, Pattaramon Jongpradist, Sontipee Aimmanee, and Yossapong Laoonual. "Design and optimization of electric bus monocoque structure consisting of composite materials." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 20 (April 15, 2020): 4069–86. http://dx.doi.org/10.1177/0954406220917690.

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This paper proposes a novel design methodology for electric-bus structures by implementing the finite element method via ABAQUS™ and linear programming via MATLAB™. A monocoque sandwich-structured fiber-reinforced composite bus with a maximum driving range of 300 km is conceived using the proposed methodology. The bus-body structure is designed based on safety criteria such as vehicle registration regulations, the strength of the bus structure under various driving conditions, bending- and torsion-stiffness requirements, and the rollover testing standard of UN ECE R66. A procedure developed to systematically conduct parametric studies by varying the core and face thicknesses of the sandwich structure of each component is presented. Multivariate functions are formulated to determine the correlations of structural responses with changes in geometric parameters. Linear programming is implemented to minimize the mass of the bus structure under design constraints. The proposed monocoque bus structure meets all requirements, and its body mass is 63.3% less than the benchmark value.

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15

Humphreys, Matthew F., Gerard Van Erp, and Charles H. Tranberg. "The Structural Behaviour of Monocoque Fibre Composite Truss Joints." Advanced Composites Letters 8, no. 4 (July 1999): 096369359900800. http://dx.doi.org/10.1177/096369359900800405.

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This paper presents early experimental results of an ongoing research project into the structural behaviour of monocoque fibre composite truss joints. The testing of three different types of joints will be discussed. Descriptions of the test procedures are presented as well as design and analysis of each jointing method.

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16

De Vivo Nicoloso, Luca Gabriele, Joshua Pelz, Herb Barrack, and Falko Kuester. "Towards 3D printing of a monocoque transtibial prosthesis using a bio-inspired design workflow." Rapid Prototyping Journal 27, no. 11 (August 28, 2021): 67–80. http://dx.doi.org/10.1108/rpj-06-2021-0136.

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Purpose There are over 40 million amputees globally with more than 185,000 Americans losing their limbs every year. For most of the world, prosthetic devices remain too expensive and uncomfortable. This paper aims to outline advancements made by a multidisciplinary research group, interested in advancing the restoration of human motion through accessible lower limb prostheses. Design/methodology/approach Customization, comfort and functionality are the most important metrics reported by prosthetists and patients. The work of this paper presents the design and manufacturing of a custom made, cost-effective and functional three-dimensional (3D) printed transtibial prosthesis monocoque design. The design of the prosthesis integrates 3D imaging, modelling and optimization techniques coupled with additive manufacturing. Findings The successful fabrication of a functional monocoque prosthesis through 3D printing indicates the workflow may be a solution to the worldwide accessibility crisis. The digital workflow developed in this work offers great potential for providing prosthetic devices to rural communities, which lack access to skilled prosthetic physicians. The authors found that using the workflow together with 3D printing, this study can create custom monocoque prostheses (Figure 16). These prostheses are comfortable, functional and properly aligned. In comparison with traditional prosthetic devices, the authors slowered the average cost, weight and time of production by 95%, 55% and 95%, respectively. Social implications This novel digital design and manufacturing workflow has the potential to democratize and globally proliferate access to prosthetic devices, which restore the patient’s mobility, quality of life and health. LIMBER’s toolbox can reach places where proper prosthetic and orthotic care is not available. The digital workflow reduces the cost of making custom devices by an order of magnitude, enabling broader reach, faster access and improved comfort. This is particularly important for children who grow quickly and need new devices every few months or years, timely access is both physically and psychologically important. Originality/value In this manuscript, the authors show the application of digital design techniques for fabricating prosthetic devices. The proposed workflow implements several advantageous changes and, most importantly, digitally blends the three components of a transtibial prosthesis into a single, 3D printable monocoque device. The development of a novel unibody transtibial device that is properly aligned and adjusted digitally, greatly reduces the number of visits an amputee must make to a clinic to have a certified prosthetist adjust and modify their prosthesis. The authors believe this novel workflow has the potential to ease the worldwide accessibility crisis for prostheses.

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17

HIROTA, Naoki, Shu KARUBE, Toshihiko NAKANO, Kyuhei HONDA, and Kenichi TAKAHASHI. "Development of Monocoque Frame Robots Using Plastic Honeycomb Cardboard." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2018 (2018): 1P2—F06. http://dx.doi.org/10.1299/jsmermd.2018.1p2-f06.

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18

Nerubailo, B. V., N. V. Zotova, R. Kh Orlov, and S. V. Sukhorukova. "The Applicability of Saint-Venant's Principle to Monocoque Structures." Journal of Engineering Physics and Thermophysics 78, no. 3 (May 2005): 586–89. http://dx.doi.org/10.1007/s10891-005-0099-1.

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19

Farrow, Ian. "Design, Build and Test of a Semi-Monocoque Wing Structure." International Journal of Mechanical Engineering Education 30, no. 1 (January 2002): 73–89. http://dx.doi.org/10.7227/ijmee.30.1.7.

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20

Vozniuk, L. "Efficiency of monocoque overlap constructions compared to classic reinforced concrete." Vìsnik L’vìvs’kogo nacìonal’nogo agrarnogo unìversitetu. Arhìtektura ì sìl’s’kogospodars’ke budìvnictvo 21, no. 1 (December 1, 2020): 61–65. http://dx.doi.org/10.31734/architecture2020.21.061.

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21

Popa, Lucreţia, Ştefan-Iulian Moise, Victor Moise, Vasilica Ştefan, and Iulian Tabără. "Structural and kinematic analysis of a shutter from monocoque trailer." E3S Web of Conferences 112 (2019): 03021. http://dx.doi.org/10.1051/e3sconf/201911203021.

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The bodies of trucks or trailers are provided with automatic folding shutters to ease the discharge of the transported materials. Typically, these shutters are powered by mechanisms that have active motor groups such as RRTaR or RR-RR-RTaR (i.e. motor dice or triads) and passive motor groups such as RRR, RR-RR-RR etc. If the technological forces are high and the relative speeds between the elements forming the steering coupler are small, the motor groups are formed by rigid bars and hydraulic cylinders. If relatively high gear ratios are required, then pneumatic cylinders may be used. If required relatively high speeds in the driving couplings, then you can use pneumatic cylinders. This paper presents structural and kinematic analysis of a shutter from a trailer used to transport bulk agricultural products, discharge towards the back. For the kinematic analysis of the folding shutter mechanism, computational procedures written in the Matlab syntax are used. The results of the calculations are presented in tabular and diagrams. After the cinematic analysis of the mechanism, it is possible to perform its cinetostatic analysis, i.e. the determination of the reactions from the kinematic couplers, as well as the hydraulic force in the hydraulic cylinder. Results can be used for the dimensional verification of the chosen elements.

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22

Castej�n, L., A. Miravete, J. Ullod, and E. Larrod�. "Composite monocoque frame for a mountain bicycle: Testing and calculation." Applied Composite Materials 1, no. 3 (1994): 247–58. http://dx.doi.org/10.1007/bf00567530.

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23

Liu, Xiang. "Analysis of Automobile Body Structure and Monocoque Body Welding Technology." Journal of Physics: Conference Series 1852, no. 4 (April 1, 2021): 042063. http://dx.doi.org/10.1088/1742-6596/1852/4/042063.

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24

Hill, R. D. "The Design and Development of the LotusSport Pursuit Bicycle." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 207, no. 4 (October 1993): 285–94. http://dx.doi.org/10.1243/pime_proc_1993_207_194_02.

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Aerodynamic drag constitutes over 96 per cent of the overall resistance to motion for a typical rider and bicycle combination. Although the rider of a typical track pursuit bicycle constitutes approximately two-thirds of the overall aerodynamic drag, the bicycle itself still contributes one-third. Any reduction in the drag generated by the bicycle can therefore have a significant effect on the maximum attainable speed for a given power input, and thus the time to cover a given race distance. At the same time it is important to optimize the riding position so as to minimize both the rider drag and any interference effects between the rider and bicycle. Cross-wind conditions are also of vital importance to cyclists. For most conventional tubular framed bicycles any wind on a velodrome will result in significantly slower times due to the increased drag. For a properly designed monocoque aero bicycle, however, a cross-wind can mean faster times on a velodrome due to a ‘sail’ effect being generated. The LotusSport monocoque pursuit cycle has been designed and developed to gain maximum benefit from aerodynamic drag reduction and sail effects. It was produced for, and used at, the 1992 Barcelona Olympic Games where it was ridden to the gold medal in the 4000 metre individual pursuit event.

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25

Wu, Jingsi, Owusu Agyeman Badu, Yonchen Tai, and Albert R. George. "Design, Analysis, and Simulation of an Automotive Carbon Fiber Monocoque Chassis." SAE International Journal of Passenger Cars - Mechanical Systems 7, no. 2 (April 1, 2014): 838–61. http://dx.doi.org/10.4271/2014-01-1052.

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26

Vozniuk, Leonid, and Bogdan Demchyna. "Calculation and evaluation of the effectiveness of multilayer and monocoque slabs." Energy-Efficiency in Civil Engineering and Architecture, no. 10 (April 20, 2018): 69–76. http://dx.doi.org/10.32347/2310-0516.2018.10.69-76.

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27

Airale, A., M. Carello, and A. Scattina. "Carbon fiber monocoque for a hydrogen prototype for low consumption challenge." Materialwissenschaft und Werkstofftechnik 42, no. 5 (May 2011): 386–92. http://dx.doi.org/10.1002/mawe.201100793.

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28

Lee, In-Chul, and Dong-Hwan Jang. "Development Process of Monocoque Frame for Hybrid Bicycle using Bolt Fastening." Journal of the Korean Society of Manufacturing Process Engineers 12, no. 6 (December 31, 2013): 93–100. http://dx.doi.org/10.14775/ksmpe.2013.12.6.093.

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29

Katrňák, Tomáš, Jaroslav Juračka, and Ivo Jebáček. "RESEARCH OF EFFECTS OF DEFECTS ON STABILITY FAILURES OF SEMI-MONOCOQUE STIFFENERS." Aviation 23, no. 3 (January 29, 2020): 83–90. http://dx.doi.org/10.3846/aviation.2019.11903.

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This article presents further results of the research of effects of model defects on the local buckling of compressed stiffeners in nonlinear finite element (FE) analyses. The main outcomes are confirmation of trends for 10 sets of profile dimensions, final validations of various sets of FE simulations, and designs of practical types of defects with appropriate ratio values. A single node defect and then complex types of defects with alternating distributions of node shifts along one edge, two free flange edges, one flange surface and both flange surfaces are analyzed in this research project. First parts of this paper describe designed FE models with defects, their effects on simulation results, colored graphic visualizations with stress scales and determinations of the sudden failure of stability in the local mode. Then, particular results of FE analyses are validated by a comparison with the results of analytical methods of stability failure. Final detail comparisons of analytical and FE simulation results with data of experimental tests confirm predicted critical buckling forces. The validation of results and design parameters together with the knowledge of effects of model defects on buckling behaviors allows more accurate simulations of internal stiffeners of thin-walled semi-monocoque structures.

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Lee, Jung-Ho, and Jae-Ung Cho. "An Durability Study due to the Model of Vehicle Monocoque Body Frame." Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology 5, no. 5 (October 31, 2015): 486–96. http://dx.doi.org/10.14257/ajmahs.2015.10.05.

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31

Kamble, Meghana, Talal Shakfeh, Reza Moheimani, and Hamid Dalir. "Optimization of a Composite Monocoque Chassis for Structural Performance: A Comprehensive Approach." Journal of Failure Analysis and Prevention 19, no. 5 (September 9, 2019): 1252–63. http://dx.doi.org/10.1007/s11668-019-00711-0.

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32

Bol'shih, A. A. "Computational study of the strength of the monocoque-type undercarriage using composite materials." Izvestiya MGTU MAMI 42, no. 4 (2019): 2–11. http://dx.doi.org/10.31992/2074-0530-2019-42-4-2-11.

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33

Engelsmann, Stephan, and Stefan Peters. "Neubau von zwei flügelartigen Überdachungsbauwerken in Monocoque-Bauweise für den ZOB Schwäbisch Hall." Stahlbau 82, no. 1 (January 2013): 49–54. http://dx.doi.org/10.1002/stab.201301651.

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34

Gruber, Mark B., Mark A. Lamontia, Michael A. Smoot, and Vasilios Peros. "Buckling Performance of Hydrostatic Compression-Loaded 7-Inch Diameter Thermoplastic Composite Monocoque Cylinders." Journal of Thermoplastic Composite Materials 8, no. 1 (January 1995): 94–108. http://dx.doi.org/10.1177/089270579500800107.

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35

Denny, Jason, Kirsty Veale, Sarp Adali, and Fiona Leverone. "Conceptual design and numerical validation of a composite monocoque solar passenger vehicle chassis." Engineering Science and Technology, an International Journal 21, no. 5 (October 2018): 1067–77. http://dx.doi.org/10.1016/j.jestch.2018.07.014.

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36

Messana, Alessandro, Lorenzo Sisca, Alessandro Ferraris, Andrea Airale, Henrique de Carvalho Pinheiro, Pietro Sanfilippo, and Massimiliana Carello. "From Design to Manufacture of a Carbon Fiber Monocoque for a Three-Wheeler Vehicle Prototype." Materials 12, no. 3 (January 22, 2019): 332. http://dx.doi.org/10.3390/ma12030332.

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This paper describes the design process of the monocoque for IDRAkronos, a three-wheeler hydrogen prototype focused on fuel efficiency, made to compete at the Shell Eco-Marathon event. The vehicle takes advantage of the lightweight and high mechanical performance of carbon fiber to achieve minimal mass and optimized fuel consumption. Based on previous experiences and background knowledge, the authors describe their work toward a design that integrates aerodynamic performance, style, structural resistance and stiffness. A portrayal of the objectives, load cases, simulations and production process—that lead to a final vehicle winner of the Design Award and 1st place general at the 2016 competition—is presented and discussed.

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37

Dababneh, Odeh, and Altan Kayran. "Design, analysis and optimization of thin walled semi-monocoque wing structures using different structural idealization in the preliminary design phase." International Journal of Structural Integrity 5, no. 3 (August 12, 2014): 214–26. http://dx.doi.org/10.1108/ijsi-12-2013-0050.

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Purpose – In modeling an aircraft wing, structural idealizations are often employed in hand calculations to simplify the structural analysis. In real applications of structural design, analysis and optimization, finite element methods are used because of the complexity of the geometry, combined and complex loading conditions. The purpose of this paper is to give a comprehensive study on the effect of using different structural idealizations on the design, analysis and optimization of thin walled semi-monocoque wing structures in the preliminary design phase. Design/methodology/approach – In the design part of the paper, wing structures are designed by employing two different structural idealizations that are typically used in the preliminary design phase. In the structural analysis part, finite element analysis of one of the designed wing configurations is performed using six different one and two dimensional finite element pairs which are typically used to model the sub-elements of semi-monocoque wing structures. Finally in the optimization part, wing structure is optimized for minimum weight by using finite element models which have the same six different finite element pairs used in the analysis phase. Findings – Based on the results presented in the paper, it is concluded that with the simplified methods, preliminary sizing of the wing configurations can be performed with enough confidence as long as the simplified method based designs are also optimized iteratively, which is what is practiced in the design phase of this study. Originality/value – This research aims at investigating the effect of using different one and two dimensional element pairs on the final analyzed and optimized configurations of the wing structure, and conclusions are inferred with regard to the sensitivity of the optimized wing configurations with respect to the choice of different element types in the finite element model.

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38

K., Ahmed, Mohamed M., Metwally M., and Mokhtar E. "METHODOLOGY OF OBTAINING STRUCTURAL MODEL OVER A MONOCOQUE CLOSED INTEGRAL SEDAN CAR BODY STRUCTURE." International Conference on Applied Mechanics and Mechanical Engineering 12, no. 12 (May 1, 2006): 432–45. http://dx.doi.org/10.21608/amme.2006.42156.

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39

Bert, Charles W. "Book Reviews: Monocoque, Sandwich, and Composite Aerospace Structures, Selected Papers of Nicholas J. Hoff." AIAA Journal 24, no. 11 (November 1986): 1888a. http://dx.doi.org/10.2514/3.48710.

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40

Catibog, Joanne Margareth R., Andrea Mikhaela B. Lazarte, and Eduardo R. Magdaluyo. "Materials Selection Methods in the Design of Monocoque for a Fuel Efficient Concept Vehicle." Procedia CIRP 84 (2019): 998–1002. http://dx.doi.org/10.1016/j.procir.2019.04.340.

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41

Гребеников, А. Г., И. В. Малков, В. А. Урбанович, Н. И. Москаленко, and Д. С. Колодийчик. "КОНСТРУКТИВНО-ТЕХНОЛОГІЧНІ ОСОБЛИВОСТІ ХВОСТО-ВИХ БАЛОК СІТЧАСТОГО ТИПУ З ПОЛІМЕРНИХ КОМПО-ЗИЦІЙНИХ МАТЕРІАЛІВ ВЕРТОЛЬОТІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ." Open Information and Computer Integrated Technologies, no. 88 (November 6, 2020): 15–30. http://dx.doi.org/10.32620/oikit.2020.88.02.

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The analysis of the design and technological features of the tail boom (ТB) of a helicopter made of polymer composite materials (PCM) is carried out.Three structural and technological concepts are distinguished - semi-monocoque (reinforced metal structure), monocoque (three-layer structure) and mesh-type structure. The high weight and economic efficiency of mesh structures is shown, which allows them to be used in aerospace engineering. The physicomechanical characteristics of the network structures are estimated and their uniqueness is shown. The use of mesh structures can reduce the weight of the product by a factor of two or more.The stress-strain state (SSS) of the proposed tail boom design is determined. The analysis of methods for calculating the characteristics of the total SSS of conical mesh shells is carried out. The design of the tail boom is presented, the design diagram of the tail boom of the transport category rotorcraft is developed. A finite element model was created using the Siemens NX 7.5 system. The calculation of the stress-strain state (SSS) of the HC of the helicopter was carried out on the basis of the developed structural scheme using the Advanced Simulation module of the Siemens NX 7.5 system. The main zones of probable fatigue failure of tail booms are determined. Finite Element Analysis (FEA) provides a theoretical basis for design decisions.Shown is the effect of the type of technological process selected for the production of the tail boom on the strength of the HB structure. The stability of the characteristics of the PCM tail boom largely depends on the extent to which its design is suitable for the use of mechanized and automated production processes.A method for the manufacture of a helicopter tail boom from PCM by the automated winding method is proposed. A variant of computer modeling of the tail boom of a mesh structure made of PCM is shown.The automated winding technology can be recommended for implementation in the design of the composite tail boom of the Mi-2 and Mi-8 helicopters.

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Kandasamy, Suganeswaran, Parameshwaran Rathinasamy, Nithyavathy Nagarajan, Karthik Arumugam, Rajasekar Rathanasamy, and Gobinath Velu Kaliyannan. "Corrosion behavioral studies on AA7075 surface hybrid composites tailored through friction stir processing." Anti-Corrosion Methods and Materials 67, no. 4 (May 8, 2020): 345–55. http://dx.doi.org/10.1108/acmm-11-2019-2215.

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Purpose This paper aims to overcome the corrosion in AA7075 by incorporating the dual-reinforcements like Al2O3 and SiC through friction stir processing (FSP). In recent days, an automotive monocoque structure undergoes corrosion because of changes in environmental conditions. Design/methodology/approach Surface hybrid composites (SHCs) of AA7075 with different weight ratios of Al2O3 and SiC were fabricated at a rotating speed of 1000 rpm, traveling speed of 56 mm/min and tool tilt angle of 2º with two passes. Surface regions were observed using optical microscopy, and the potentiodynamic corrosion test was performed under a 3.5 per cent NaCl environment at room temperature. Then, the surface morphology analysis of corroded samples and their structural properties were also investigated through scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron dispersive spectroscopy (EDS). Findings Through FSP, an improved interface between the reinforced particles and the AA7075 base matrix was observed because of the severe plastic deformation. Potentiodynamic polarization tests confirmed that the AA7075 matrix with a higher concentration of Al2O3 and a lower concentration of SiC (Al2O3 – 75 per cent and SiC – 25 per cent) possesses a lower corrosion rate than other specimens. This result is because of the combined effect of stable passive film formation and the resistance produced by hard SiC particles. In addition, the formation of a stronger interface between the reinforcements and the base matrix impedes the NaCl solution attack. The SEM micrograph depicts the film crystallinity variations with an increase in Al2O3 content. Debonding between the layers was observed on increasing the SiC content in the base matrix. XRD shows the peaks of reinforcing elements that influence the corrosion behavior. These observations suggest that the AA7075 reinforced with a higher concentration of Al2O3 and a lower concentration of SiC through FSP affords a suitable solution for automotive monocoque applications. Originality/value The corrosion rate has been identified for AA7075 SHCs with various concentrations of Al2O3 and SiC and has been compared with that of the base metal and the friction stir processed specimen without reinforcement.

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Zhang, Guo Sheng, Wei Wang, Song Ai Piao, and Xuan Dong. "The Study of Bus Superstructure Strength Based on ECE R66." Advanced Materials Research 430-432 (January 2012): 1799–804. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1799.

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Taking a full-monocoque body as the research object, the finite element analysis theory was applied to build the finite element model of the bus and the numerical simulation environment of the structural strength of the superstructure. The vehicle centre of gravity position determination was studied and calculated. According to the ECE R66 equivalent authentication method, the rollover test of body section was carried out. The rigid and strength characteristic of bus superstructure were evaluated. On this basis, the energy absorbing capability of body section during the rollover process was studied and evaluated. The results showed that the body section of bus was complied with the regulatory requirements; its structural safety characteristic was good. This design method of rollover crash safety had important significance and value to research and development of manufacturer.

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J., Formiga, Sousa L., and Infante V. "Numerical and Experimental Analysis of the Suspension Connection Zone of a Formula Student Monocoque Chassis." Procedia Structural Integrity 17 (2019): 886–93. http://dx.doi.org/10.1016/j.prostr.2019.08.118.

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Ohara, Yukoh, Takeshi Hara, Alejandro A. Espinoza Orías, Satoshi Tani, Nozomu Inoue, and Junichi Mizuno. "In vitro biomechanical evaluation of a monocoque plate-spacer construct for cervical open-door laminoplasty." PLOS ONE 13, no. 10 (October 18, 2018): e0204147. http://dx.doi.org/10.1371/journal.pone.0204147.

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Tsirogiannis, Evangelos Ch, Georgios E. Stavroulakis, and Sofoklis S. Makridis. "Optimised ultrafast lightweight design and finite element modelling of a CFRP monocoque electric car chassis." International Journal of Electric and Hybrid Vehicles 11, no. 3 (2019): 255. http://dx.doi.org/10.1504/ijehv.2019.101300.

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S. Mohamed Ali, J., Hasna Nur Fadhila, Burhani M. Burhani, and Miah Mohammed Riyadh. "Educational Software for Stress Analysis of Idealized Closed Thin Walled Sections." International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 368. http://dx.doi.org/10.14419/ijet.v7i4.36.28144.

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Aerospace structures are typically semi-monocoque structures that are made up of thin-walled closed section reinforced with stiffeners. Stress analysis of such closed thin-walled structures which are statically indeterminate is tedious and time consuming. An educational software which can aid students in carrying out stress analysis of such idealized thin-walled closed sections has been developed. The software enables students to select different types of wing torsion box sections with stiffeners, which may be subjected to bending, shear or torsional loads and evaluate the resulting stresses on it. The software allows the student to idealize a selected twin spar unsymmetrical wing section with multiple booms under multiple loads. Results from this software have been validated against the results in the literature. The software has been developed using MATLAB with graphical user interface (GUI) which is very user friendly.

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Davies, H. C., M. Bryant, M. Hope, and C. Meiller. "Design, development, and manufacture of an aluminium honeycomb sandwich panel monocoque chassis for Formula Student competition." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 226, no. 3 (September 23, 2011): 325–37. http://dx.doi.org/10.1177/0954407011418578.

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Skukis, Eduards, Gints Jekabsons, Jānis Andersons, Olgerts Ozolins, Edgars Labans, and Kaspars Kalnins. "Robustness of Empirical Vibration Correlation Techniques for Predicting the Instability of Unstiffened Cylindrical Composite Shells in Axial Compression." Polymers 12, no. 12 (December 21, 2020): 3069. http://dx.doi.org/10.3390/polym12123069.

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Thin-walled carbon fiber reinforced plastic (CFRP) shells are increasingly used in aerospace industry. Such shells are prone to the loss of stability under compressive loads. Furthermore, the instability onset of monocoque shells exhibits a pronounced imperfection sensitivity. The vibration correlation technique (VCT) is being developed as a nondestructive test method for evaluation of the buckling load of the shells. In this study, accuracy and robustness of an existing and a modified VCT method are evaluated. With this aim, more than 20 thin-walled unstiffened CFRP shells have been produced and tested. The results obtained suggest that the vibration response under loads exceeding 0.25 of the linear buckling load needs to be characterized for a successful application of the VCT. Then the largest unconservative discrepancy of prediction by the modified VCT method amounted to ca. 22% of the critical load. Applying loads exceeding 0.9 of the buckling load reduced the average relative discrepancy to 6.4%.

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Niemann, S., B. Kolesnikov, H. Lohse-Busch, C. Hühne, O. M. Querin, V. V. Toropov, and D. Liu. "The use of topology optimisation in the conceptual design of next generation lattice composite aircraft fuselage structures." Aeronautical Journal 117, no. 1197 (November 2013): 1139–54. http://dx.doi.org/10.1017/s0001924000008745.

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Abstract Conventional commercial aircraft fuselages use all-aluminium semi-monocoque structures where the skin carries the external loads, the internal fuselage pressurisation and is strengthen using frames and stringers. Environmental and economic issues force aircraft designers to minimise weight and costs to keep air transport competitive and safe. But as metal designs have reached a high degree of perfection, extraordinary weight and cost savings are unlikely in the future. Carbon composite materials combined with lattice structures and the use of topology optimisation have the potential to offer such weight reductions. The EU FP7 project Advanced Lattice Structures for Composite Airframes (ALaSCA) was started to investigate this. This article present some of this research which has now led to the development of a new airframe concept which consists of: a load carrying inner skin; transverse frames; CFRP-metal hybrid stiffeners helically arranged in a grid configuration; insulating foam and an additional aerodynamic outer skin.

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