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Journal articles on the topic 'Composite Structures'

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Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

Marin, Marin, Dumitru Băleanu, and Sorin Vlase. "Composite Structures with Symmetry." Symmetry 13, no. 5 (May 3, 2021): 792. http://dx.doi.org/10.3390/sym13050792.

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In recent years, the use of composite materials in structural applications has been observed. The composites have revolutionized the field of materials and allow for interesting and new developments in different engineering branches. At the same time, in all areas of engineering, there are some products or parts of products or components that contain repetitive or identical elements. Here, different types of symmetry can occur. Such systems have been studied by various researchers in the last few decades. In civil engineering, for example, most buildings, works of art, halls, etc. have, in their structure, identical parts and symmetries. This has happened since antiquity, for different reasons. First, because of their easier, faster, and cheaper design, and second, because of their easy manufacturing and (less important for engineers, but important to the beneficiaries) for aesthetic reasons. The symmetry in the field of composite materials manifests itself in two different ways, at two levels—one due to the symmetries that appear in the composition of the composite materials and that determine the properties of the materials, and second in the structures manufactured with composites. The study of the obvious importance of the existence of symmetries in the design of composite materials or composite structures of a sandwich type, for example (but also other types), and of the existence of symmetries in structures constructed also using composite materials will be highlighted within this Special Issue. With this Issue, we want to disseminate knowledge among researchers, designers, manufacturers, and users in this exciting field.

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2

Abrate, Serge. "Composite structures: impact on composites 2002." Composite Structures 61, no. 1-2 (July 2003): 1. http://dx.doi.org/10.1016/s0263-8223(03)00026-6.

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3

Marshall, I. H. "Composite structures." NDT & E International 27, no. 4 (January 1994): 210. http://dx.doi.org/10.1016/0963-8695(94)90457-x.

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4

van Tooren, M., C. Kasapoglou, and H. Bersee. "Composite materials, composite structures, composite systems." Aeronautical Journal 115, no. 1174 (December 2011): 779–87. http://dx.doi.org/10.1017/s0001924000006527.

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Abstract The first part of the history of composites in aerospace emphasised materials with high specific strength and stiffness. This was followed by a quest for reliable manufacturing techniques that guaranteed sufficiently high fibre volume fractions in complex structural parts with reasonable cost. Further improvements are still possible leading, ultimately to an extension of the functionality of composite structures to non-mechanical functions. Reduction of material scatter and a more probability-based design approach, improved material properties, higher post buckling factors, improved crashworthiness concepts and improved NDI techniques are some of the evolutionary measures that could improve the performance of current composite structures. Modular design, increased co-curing, hybrid material structures, hybrid fabrication methods, innovative structural concepts and reduced development times are more revolutionary steps that could bring today’s solutions further. Manufacturing engineering is also important for achieving revolutionary change. Function integration such as embedded deicing, morphing,, and boundary-layer suction are among the next steps in weight and cost reduction, but now on the system level.

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5

Kientzl, Imre, Imre Norbert Orbulov, János Dobránszky, and Árpád Németh. "Mechanical Behaviour Al-Matrix Composite Wires in Double Composite Structures." Advances in Science and Technology 50 (October 2006): 147–52. http://dx.doi.org/10.4028/www.scientific.net/ast.50.147.

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The fibre reinforced metal matrix composites (FRMMC-s) are one of the main groups of the composite materials. The composite wires are continuous-fibre-reinforced aluminium matrix composites, which are made by a continuous process. Composite wires already have a few experimental applications for the reinforcement of high voltage electric cables. Other experimental application fields of these materials are the preferential reinforcement of the cast parts. In this way significant decrease in the weight could be achieved. The aim of this study is to show the excellent mechanical properties of the composite wires, and the contact relationship between the mechanical and other properties (i.e. thermoelectric power) and the possibility of their standardized production. The continuous production process of the composite wires and their test results were are shown as well. The difference between the composite wire reinforced double composite structures and direct fibre reinforced blocks were delineated as well. In this paper specimens were examined by tensile tests, bending tests, thermal aging tests and thermoelectric power measurement.

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6

Potter, K. D., M. R. Wisnom, M. V. Lowson, and R. D. Adams. "Innovative approaches to composite structures." Aeronautical Journal 102, no. 1012 (February 1998): 107–11. http://dx.doi.org/10.1017/s0001924000065659.

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The precise birth date of the aerospace composites industry cannot readily be identified; perhaps one should really talk about its rebirth as the first aircraft relied on natural composites such as wood. McMullen gives 1946 as the date that work on cellulose based composites for aircraft use was abandoned in favour of much more stable inorganic reinforcement fibres. This change in the direction of approach was crucial to further developments and can be thought of as marking the start of the aerospace composites industry that can be seen today. Whatever the exact date the industry is now about 50 years old so this golden jubilee edition seems an appropriate place to look at the constraints on the use of composite materials and at recent work at Bristol University aimed at reducing these constraints.

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7

Yu, Wenbin. "A Review of Modeling of Composite Structures." Materials 17, no. 2 (January 17, 2024): 446. http://dx.doi.org/10.3390/ma17020446.

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This paper provides a brief review on modeling of composite structures. Composite structures in this paper refer to any structure featuring anisotropy and heterogeneity, including but not limited to their traditional meaning of composite laminates made of unidirectional fiber-reinforced composites. Common methods used in modeling of composite structures, including the axiomatic method, the formal asymptotic method, and the variational asymptotic method, are illustrated in deriving the classical lamination theory for the composite laminated plates. Future research directions for modeling composite structures are also pointed out.

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8

Amaechi, Chiemela Victor, Cole Chesterton, Harrison Obed Butler, Nathaniel Gillet, Chunguang Wang, Idris Ahmed Ja’e, Ahmed Reda, and Agbomerie Charles Odijie. "Review of Composite Marine Risers for Deep-Water Applications: Design, Development and Mechanics." Journal of Composites Science 6, no. 3 (March 17, 2022): 96. http://dx.doi.org/10.3390/jcs6030096.

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In recent times, the utilisation of marine composites in tubular structures has grown in popularity. These applications include composite risers and related SURF (subsea umbilicals, risers and flowlines) units. The composite industry has evolved in the development of advanced composites, such as thermoplastic composite pipes (TCP) and hybrid composite structures. However, there are gaps in the understanding of its performance in composite risers, hence the need for this review on the design, hydrodynamics and mechanics of composite risers. The review covers both the structure of the composite production riser (CPR) and its end-fittings for offshore marine applications. It also reviews the mechanical behaviour of composite risers, their microstructure and strength/stress profiles. In principle, designers now have a greater grasp of composite materials. It was concluded that composites differ from standard materials such as steel. Basically, composites have weight savings and a comparative stiffness-to-strength ratio, which are advantageous in marine composites. Also, the offshore sector has grown in response to newer innovations in composite structures such as composite risers, thereby providing new cost-effective techniques. This comprehensive review shows the necessity of optimising existing designs of composite risers. Conclusions drawn portray issues facing composite riser research. Recommendations were made to encourage composite riser developments, including elaboration of necessary standards and specifications.

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9

McGrath, Gareth C. "Joining Composite Structures." Indian Welding Journal 33, no. 4 (October 1, 2000): 30. http://dx.doi.org/10.22486/iwj.v33i4.177842.

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10

Balke, Katarzyna, and Krzysztof J. Kurzydłowski. "Bridge composite structures." Mechanik, no. 7 (July 2015): 501–4. http://dx.doi.org/10.17814/mechanik.2015.7.323.

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11

R.J. "Composite Structures—3." Composite Structures 5, no. 4 (January 1986): 319–20. http://dx.doi.org/10.1016/0263-8223(86)90041-3.

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12

Barrett, David John. "Damped composite structures." Composite Structures 18, no. 3 (January 1991): 283–94. http://dx.doi.org/10.1016/0263-8223(91)90037-y.

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13

Marshall, I. H. "Composite structures award." Composite Structures 22, no. 1 (January 1992): 1–2. http://dx.doi.org/10.1016/0263-8223(92)90033-9.

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14

Banks, W. M. "Composite structures—2." Thin-Walled Structures 3, no. 1 (January 1985): 87–88. http://dx.doi.org/10.1016/0263-8231(85)90024-2.

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15

Zimcik, D. G. "Application of Composite Materials to Space Structures." Transactions of the Canadian Society for Mechanical Engineering 12, no. 2 (June 1988): 49–56. http://dx.doi.org/10.1139/tcsme-1988-0008.

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Advanced composite materials are playing an increasingly important role in the design and fabrication of high performance space structures. Composite materials may be tailored for a particular application to establish a unique combination of high specific stiffness and strength, dimensional stability and specific damping which makes these materials ideal candidates for many applications in the hostile space environment. Demonstrative examples of typical applications to primary structures and payloads, each with a different set of performance requirements, are presented in this paper. Unfortunately, the use of polymer matrix composites for very long exposure to space has not been without problems due to various environmental effects which are discussed. The use of metal matrix composites is proposed as a possible solution to the problem. However, an understanding of the fundamental properties of composites and their response to space environmental effects is essential before the full benefit of these materials can be realized.

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16

Mahmood Baitab, Danish, Dayang Laila Abang Haji Abdul Majid, Ermira Junita Abdullah, and Mohd Faisal Abdul Hamid. "A review of techniques for embedding shape memory alloy (SMA) wires in smart woven composites." International Journal of Engineering & Technology 7, no. 4.13 (October 9, 2018): 129. http://dx.doi.org/10.14419/ijet.v7i4.13.21344.

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Metallic structures, in various industrial fields such as transport and aerospace, are mostly replaced by composite structures having less weight and good strength. There is also a need of intensification of the operational dynamic environment with high durability requirements. So a smart composite structure is required that can manifest its functions according to environmental changes. One method of producing smart composite structures is to embed shape memory alloys in composite structures. Shape memory alloys (SMAs) have significant mechanical and thermodynamic properties and are available in very small diameters less than 0.2mm. These SMAs are embedded into composites for obtaining smart composites having tunable properties, active abilities, damping capacity and self-healing properties. Shape memory alloys are available in different shapes as wires, sheets, foils, strips, etc. For smart composites, mostly SMA embedded are in wire shape. Different techniques are used for embedding SMA wires in composites. SMA wires can be embedded between layers of laminates of composites, or embedded directly as reinforcement in matrix and can be woven into fabrics and used as a reinforcement. This paper reviews the different techniques of embedding SMA wires in composite structures, their pros and cons and their applications.

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17

Mun, Wai Chee, Ahmad Rivai, and Omar Bapokutty. "Design and Analysis of an Aircraft Composite Hinge Bracket Using Finite Element Approach." Applied Mechanics and Materials 629 (October 2014): 158–63. http://dx.doi.org/10.4028/www.scientific.net/amm.629.158.

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The use of composite materials in aircraft structures have been increasing for the past decade. The anisotropic and heterogeneous nature of composites remains a major challenge to the design and analysis of composite aircraft structures. Composite structures require a different design approach compared to the design of metallic structures. This paper aims to provide a step by step definitive guide to design and analyze composite structures using finite element approach. A simplified design model for the composite structural design was used to analyze an aircraft composite hinge bracket. The composite hinge bracket which is made of IM7/8552 laminated composite plates was successfully designed with a margin of safety of 0.216 and a weight savings of 43.77 percent was estimated.

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18

Malakhov, Andrei V. "Influence of Curved Fibers on the Mechanical Behavior of Variable Stiffness Composites." Key Engineering Materials 910 (February 15, 2022): 814–19. http://dx.doi.org/10.4028/p-zd7k11.

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Composite materials are widely used in various industries due to their high specific characteristics. The most common composites are laminates, which consist of multidirectional layers with unidirectional fibers adapted to stresses of the laminates. However, the efficiency of such structures is significantly reduced when there are stress concentrators. One of the ways to increase the efficiency of composite structures with stress concentrators is to change the reinforcement structure and use the transition from unidirectional fibers to curvilinear fibers, which could be adapted to both the geometry and the loads of the composite structures. This short review describes the various methods by which it is possible to manufacture composite structures with curved fibers and change the reinforcement structure. Composite structures both unidirectional fibers and curved fibers made by different manufacturing technologies are considered and compared as well as the efficiency of the composites is analyzed.

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19

Khaliulin, V. I., P. A. Petrov, V. A. Kostin, and N. V. Levshonkov. "Exploratory analysis of hybrid polymer metal-composite structures." VESTNIK of Samara University. Aerospace and Mechanical Engineering 22, no. 3 (November 3, 2023): 160–75. http://dx.doi.org/10.18287/2541-7533-2023-22-3-160-175.

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The results of research in the field of development of technology for the manufacture of hybrid composites according to the scheme of directional fiber netting are presented. Reinforcement is carried out by combining carbon fibers and metal wire, impregnation with a polymer binder by infusion. The results of experimental evaluation of the tensile strength of composites reinforced only with wire, as well as hybrid samples with different percentages of carbon and metal fibers are presented. A significant dependence of the strength of the hybrid composite on the volume ratios of reinforcing materials and technological factors has been established. Design and technology recommendations aimed at improving the functional parameters of the hybrid composite are formulated.

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20

Yakubovskiy, Yu E., V. I. Kolosov, A. G. Kuzyaev, and S. O. Kruglov. "Calculation and manufacture of multilayer composite structures." E3S Web of Conferences 474 (2024): 01066. http://dx.doi.org/10.1051/e3sconf/202447401066.

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A brief overview of the work done to solve the problems of bending of composite plates and shells is presented. A mathematical model has been developed that takes into account the physically nonlinear properties of the layer’s material. The seams between the layers have finite longitudinal stiffness. Seams can be continuous or discrete (anchors). The proposed mathematical model makes it possible to take into account the creep properties of the aging material. The reliability of calculations is substantiated by comparison with experimental data and known calculations. Taking into account the temperature mode made it possible to develop a technology for manufacturing multilayer structures with predicted properties of the material of the layers. Based on the results presented, methods for calculating multilayer structures and technologies for their manufacture have been developed. It is proposed to create products from cement-based composites with unique planned characteristics, oriented to the intended purpose of the manufactured structures. The intended purpose of products can be achieved by using a material with special characteristics in each layer. To protect against rodents and microorganisms, light antiseptics can be used in the process of making the composite. The solution of these issues in thin-walled structures is associated with the development of technologies for creating multilayer composite systems. The results of the creation of composites are presented.

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21

Deng, Tong, Vivek Garg, and Michael S. A. Bradley. "Erosive Wear of Structured Carbon-Fibre-Reinforced Textile Polymer Composites under Sands Blasting." Lubricants 12, no. 3 (March 15, 2024): 94. http://dx.doi.org/10.3390/lubricants12030094.

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Textile polymer composite is made of structured fibre matrix using textile technologies in fabrication, and gains benefits from strong mechanical properties with extra light weight. However, erosion behaviours and associated wear mechanisms of the composites may be influenced by the fibre structures due to heterogeneous composition and complex architectural topologies. Understanding the erosive mechanisms of the structured composites can be important, not only for preventing surface damage and loss of mechanical strength but also for improving design and fabrication of the composites. This paper presents an experimental study of erosive wear under sand blasting on 3D woven carbon-fibre-reinforced textile composites with epoxy. The architectural topology methods of the composites include non-crimped bidirectional, tufted bidirectional, 3D layer-to-layer and 3D orthogonal textile methods. The erosion tests were conducted on four impact angles (20°, 30°, 45° and 90°) under one impact velocity at 40 m/s. The study results show that the erosive mechanism of the textile composites is different from that of the neat substrate material. The observations from this study also reveal the different erosive behaviours between the composites with different fibre structures. It concludes that architectural structures can influence the erosion of a textile composite but will not result in significant differences in the wear resistance of the composites (<20%).

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22

Sellitto, Andrea, Aniello Riccio, A. Russo, Antonio Garofano, and Mauro Zarrelli. "Nanofillers’ Effects on Fracture Energy in Composite Aerospace Structures." Key Engineering Materials 827 (December 2019): 43–48. http://dx.doi.org/10.4028/www.scientific.net/kem.827.43.

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Composite materials damage behaviour is, nowadays, extensively investigated in the frame of aerospace research programmes. Among the several failure mechanisms which can affect composites, delamination can be considered as the most critical one, especially when combined to compressive loading conditions. In this context, nanofillers can represent an effective way to increase the composites fracture toughness with a consequent reduction of the delamination onset and evolution. Hence, in this paper, the toughening effect of the nanofillers on the delamination growth in composite material panels, subject to compressive load, has been numerically studied. A validated robust numerical procedure for the prediction of the delamination growth in composite materials panel, named SMXB and based on the VCCT-Fail release approach, has been used to perform numerical analyses by considering two different types of nanofillers. Reference material, without nanofillers insertion, has been used as benchmark in order to assess the capability of nanofillers to enhance the fracture toughness in composite laminates.

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23

Ashraf, W., M. R. Ishak, M. Y. M. Zuhri, N. Yidris, and A. M. Ya’acob. "Experimental Investigation on the Mechanical Properties of a Sandwich Structure Made of Flax/Glass Hybrid Composite Facesheet and Honeycomb Core." International Journal of Polymer Science 2021 (March 10, 2021): 1–10. http://dx.doi.org/10.1155/2021/8855952.

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This research is aimed at developing the sandwich structure with a hybrid composite facesheet and investigate its mechanical properties (tensile, edgewise compression, and flexural). The combination of renewable and synthetic materials appears to reduce the weight, cost, and environmental impact compared to pure synthetic materials. The hybrid composite facesheets were fabricated with different ratios and stacking sequence of flax and glass fibers. The nonhybrid flax and glass composite facesheet sandwich structures were fabricated for comparison. The overall mechanical performance of the sandwich structures was improved by increasing the glass fiber ratio in the hybrid composites. The experimental tensile properties of the hybrid facesheet and the edgewise compression strength and ultimate flexural facing stress of the hybrid composites sandwich structures were achieved higher when the results were normalized to the same fiber volume fraction of glass composite. The hybrid composite sandwich structure showed improved compression and flexural facing stress up to 68% and 75%, respectively, compared to nonhybrid flax composites. The hybrid composite using glass in the outer layer achieved the similar flexural stiffness of the nonhybrid glass composite with only a 6% higher thickness than the glass composite sandwich structure.

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24

Vesenjak, Matej, Franci Gačnik, Lovre Krstulović-Opara, and Zoran Ren. "Behavior of composite advanced pore morphology foam." Journal of Composite Materials 45, no. 26 (August 1, 2011): 2823–31. http://dx.doi.org/10.1177/0021998311410489.

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The mechanical characterization of advanced pore morphology (APM) foam, consisting of sphere-like metallic foam elements, is very limited since APM foam has been developed only recently. The purpose of this research was thus to determine the behavior of APM spheres and its composites when subjected to compressive loading. Single metallic APM spheres have been characterized with experimental testing and computational simulations, providing the basic properties and knowledge for an efficient composition of composite APM foam structures. Then, the APM foam elements were molded with epoxy matrix resulting in new composite structures. These composites have been adhered together with the epoxy resin achieving partial and syntactic morphology. The mechanical characterization of composite APM foam structures was based on experimental testing results with free and confined boundaries. The results of the performed research have shown valuable mechanical properties of the composite APM foam structures. Furthermore, they offer new possibilities for their use in general engineering applications.

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25

Srihi, Khouloud, Zakaria Zergoune, Nadia Massé, Garip Genc, and Ali El Hafidi. "Modal behavior of post low velocity impact flax/epoxy composite structures." Vibroengineering PROCEDIA 43 (June 13, 2022): 46–51. http://dx.doi.org/10.21595/vp.2022.22525.

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Natural fibers are increasingly used for polymer composite intending to minimize the environmental impact. Bio-composite materials are increasingly being used in industrial transport structures, including aerospace and automotive. Natural fiber reinforces composites with equivalent performances of glass fiber composites, have higher amount of fiber, resulting in less pollution and much lighter weight, which reduces the fuel consumption. Also, they offer the ability to design complex parts and high mechanical properties structures. Barely visible impact damage (BVID) represent a serious threat to the efficiency of bio-composite materials. In this paper, modal analysis was used to investigate and evaluate the impact-induced damage of flax/epoxy composite plates. The vibratory behavior is an indicator of the structural health monitoring of composite materials. Natural frequency, damping loss factors and displacement pattern, named mode shapes, are studied in order to detect damage and anticipate perilous consequences through time.

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26

Yartsev, B. "Composite vibration-damping structures." Transactions of the Krylov State Research Centre 2, no. 388 (May 22, 2019): 55–68. http://dx.doi.org/10.24937/2542-2324-2019-2-388-55-68.

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27

Kollar, LP, GS Springer, and M.-A. Erki. "Mechanics of Composite Structures." Applied Mechanics Reviews 57, no. 3 (2004): B14. http://dx.doi.org/10.1115/1.1760519.

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Decolon,, C., and E. Armanios,. "Analysis of Composite Structures." Applied Mechanics Reviews 56, no. 1 (January 1, 2003): B5. http://dx.doi.org/10.1115/1.1523357.

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Vasiliev, Valery V., Robert M. Jones, Lucia I. Man, and C. W. Bert. "Mechanics of Composite Structures." Journal of Applied Mechanics 61, no. 2 (June 1, 1994): 503. http://dx.doi.org/10.1115/1.2901486.

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30

Ko, Frank. "Toughened Complex Composite Structures." Materials and Processing Report 2, no. 12 (March 1988): 1–2. http://dx.doi.org/10.1080/08871949.1988.11752142.

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Lachaud, Frédéric, Robert Piquet, Francis Collombet, and Laurent Surcin. "Drilling of composite structures." Composite Structures 52, no. 3-4 (May 2001): 511–16. http://dx.doi.org/10.1016/s0263-8223(01)00040-x.

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32

Davies, G. A. O., and R. Olsson. "Impact on composite structures." Aeronautical Journal 108, no. 1089 (November 2004): 541–63. http://dx.doi.org/10.1017/s0001924000000385.

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The problem of impact damage in laminated composite structures, and the consequent reduction in residual strength, has been a topic of continual research for over two decades. The number of journal papers on the subject now runs into four figures and most have been conscientiously reviewed by Abrate(1991, 1994, 1998). This review is not intended to be in the academic tradition, with emphasis on acknowledging the authorship of all the various research initiatives. Instead we present our opinions so that the reader can appreciate our current understanding of the problem, our capability of predicting by analysis, and the scope of the design tools for avoiding structural damage, or at least designing damage tolerant aerospace structures.

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33

Morgan, F. "Composite perforated implant structures." Cell Transplantation 4, no. 6 (November 12, 1995): V—VI. http://dx.doi.org/10.1016/0963-6897(96)85236-5.

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34

Beardmore, P. "Composite structures for automobiles." Composite Structures 5, no. 3 (January 1986): 163–76. http://dx.doi.org/10.1016/0263-8223(86)90001-2.

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35

Marshall, I. H. "Composite Materials and Structures." Composite Structures 13, no. 3 (January 1989): 235. http://dx.doi.org/10.1016/0263-8223(89)90006-8.

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36

Marshall, I. H. "Mechanics of Composite Structures." Composite Structures 28, no. 2 (January 1994): 225. http://dx.doi.org/10.1016/0263-8223(94)90053-1.

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37

Nicolais, L., and Antonio Apicella. "Processing of composite structures." Pure and Applied Chemistry 57, no. 11 (January 1, 1985): 1701–6. http://dx.doi.org/10.1351/pac198557111701.

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38

Gut, K. "Composite optical waveguide structures*." Journal de Physique IV (Proceedings) 137 (November 2006): 87–90. http://dx.doi.org/10.1051/jp4:2006137016.

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39

Ceccotti, Ario. "Composite concrete-timber structures." Progress in Structural Engineering and Materials 4, no. 3 (2002): 264–75. http://dx.doi.org/10.1002/pse.126.

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40

"Composite structures." Composite Structures 30, no. 1 (January 1995): i—viii. http://dx.doi.org/10.1016/0263-8223(95)90002-0.

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41

"Composite Structures." Additives for Polymers 1990, no. 11 (November 1990): 16. http://dx.doi.org/10.1016/0306-3747(90)90296-e.

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"Composite structures." Additives for Polymers 1990, no. 12 (December 1990): 16. http://dx.doi.org/10.1016/0306-3747(90)90340-8.

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43

"Composite structures." Composites 22, no. 3 (May 1991): 254–55. http://dx.doi.org/10.1016/0010-4361(91)90428-j.

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44

Kalamkarov, Alexander L., Igor V. Andrianov, and Vladyslav V. Danishevs’kyy. "Asymptotic Homogenization of Composite Materials and Structures." Applied Mechanics Reviews 62, no. 3 (March 31, 2009). http://dx.doi.org/10.1115/1.3090830.

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The present paper provides details on the new trends in application of asymptotic homogenization techniques to the analysis of composite materials and thin-walled composite structures and their effective properties. The problems under consideration are important from both fundamental and applied points of view. We review a state-of-the-art in asymptotic homogenization of composites by presenting the variety of existing methods, by pointing out their advantages and shortcomings, and by discussing their applications. In addition to the review of existing results, some new original approaches are also introduced. In particular, we analyze a possibility of analytical solution of the unit cell problems obtained as a result of the homogenization procedure. Asymptotic homogenization of 3D thin-walled composite reinforced structures is considered, and the general homogenization model for a composite shell is introduced. In particular, analytical formulas for the effective stiffness moduli of wafer-reinforced shell and sandwich composite shell with a honeycomb filler are presented. We also consider random composites; use of two-point Padé approximants and asymptotically equivalent functions; correlation between conductivity and elastic properties of composites; and strength, damage, and boundary effects in composites. This article is based on a review of 205 references.

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45

"Composite wing structures." Aircraft Engineering and Aerospace Technology 73, no. 1 (February 2001). http://dx.doi.org/10.1108/aeat.2001.12773aab.009.

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46

"Composite ceramic structures." Composites 24, no. 8 (November 1993): 662. http://dx.doi.org/10.1016/0010-4361(93)90144-w.

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"Reinforced composite structures." Composites 23, no. 6 (November 1992): 467. http://dx.doi.org/10.1016/0010-4361(92)90068-6.

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Alaziz, Radwa, Shuvam Saha, and Rani W. Sullivan. "Stitched Graphene Nanoplatelet Composites for Unitized Aerospace Structures." Journal of Aircraft, July 25, 2023, 1–7. http://dx.doi.org/10.2514/1.c037386.

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Lightweight composites play an important role in sustainability as their usage in aerospace vehicles translates to improved fuel consumption and reduced emissions. However, due to their low interlaminar strength, delaminations and microcracking degrade their strength and stiffness properties. Through-thickness stitching in composites enhances interlaminar properties but reduces the in-plane properties. Graphene nanoplatelets (GNPs) and carbon “thin plies” have been found to increase the mechanical properties of these composite structures. This study considers a hybrid composite that uses GNPs coupled with thin plies at the midplane to mitigate the reduction in the in-plane properties. Composite specimens [Formula: see text] were stitched with two different seam angles (0 and 90°) and tested under uniaxial tensile loading. Surface strain fields from digital image correlation measurements show a significant decrease in strain concentrations in the hybrid specimens compared to the baseline stitched composites. An increase of 17% in tensile modulus and a reduction of 15% in strain energy density are realized due to the hybrid architecture of the stitched composite.

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PANDEY, Akhileshwar, Ashutosh Kumar UPADHYAY, and Karunesh Kumar SHUKLA. "Lightning strike response of composite structures: A review." Journal of Metals, Materials and Minerals 31, no. 1 (March 28, 2021). http://dx.doi.org/10.55713/jmmm.v31i1.749.

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Wind turbines and aircraft are generally made of less conductive carbon/glass composites. Significant damages may occur to these materials if they are struck by high energy lightning strikes. Damage and structural response of composites is essentially a multiphysics domain, involving thermal, electrical, magnetic and structural analysis. In this article, the fundamental physics of lightning, multiphysics analysis, numerical implementation and experimental studies about composite materials are reviewed. The relevant international standards and possible characterization methods of lightning strike damage are also reproduced in this article. In addition to this, the current and prospective technologies, to protect composite from lightning strikes are also provided.

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Galiana, Shankar, Morteza Moradi, Peter Wierach, and Dimitrios Zarouchas. "Innovative welding integration of acousto-ultrasonic composite transducers onto thermoplastic composite structures." Structural Health Monitoring, April 27, 2024. http://dx.doi.org/10.1177/14759217241247766.

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Acousto-ultrasonic composite transducers (AUCTs), comprising piezoceramic materials in a reinforced polymeric matrix, show promise for structural health monitoring in composite structures. Challenges arise when integrating AUCTs onto highly loaded thermoplastic composites, especially low-surface-energy materials like polyaryletherketone composites. To address this, the study explores the viability of attaching AUCTs to low-melting polyaryletherketone carbon fiber-reinforced thermoplastic composite structures using ultrasonic welding. This welding technique forms a joint where the interface material fuses with the AUCT embedment and the structure matrix, providing a reliable and automatable process. The investigation includes a comparative analysis of an ultrasonic welded joint with an external energy director and a reference AUCT system integrated using a vacuum bagging oven procedure. Results highlight the potential of AUCT configurations integrated by ultrasonic welding as an alternative solution, acknowledging challenges that persist for further development and increased reliability in structural health monitoring applications.

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