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Free Vibration of Carbon Nanotube–Reinforced Composite Beams under the Various Boundary Conditions
Published in Mohamed Thariq Hameed Sultan, Vishesh Ranjan Kar, Subrata Kumar Panda, Kandaswamy Jayakrishna, Advanced Composite Materials and Structures, 2023
Lazreg Hadji, Mehmet Avcar, Ömer Civalek
The desirable features of structural components in engineering applications are safety, functionality, aesthetics, and cost. The use of nonuniform, nonhomogeneous, and reinforced components helps ensure the requirements, as well as enhanced strength and structural efficiency, while lowering total cost and weight. Composite material refers to any solid that consists of more than one component, in which they are in separate phases. The main advantages of composite materials are excellent strength-to-weight and stiffness-to-weight ratios. One of the composite materials consisting of fibers in a matrix that offer considerable benefit over traditional structural materials is a fiber-reinforced composite. In contemporary engineering applications, structural components made of composite materials have an extensive range of uses—for example, the fibrous composites, consisting of carbon, glass, aramid, and basalt fibers, have seen widespread use in modern engineering and industries, such as civil, automotive, mechanical, defence, marine, aviation, and aerospace [1–4].
Introduction
Published in Andy Nieto, Arvind Agarwal, Debrupa Lahiri, Ankita Bisht, Srinivasa Rao Bakshi, Carbon Nanotubes, 2021
Andy Nieto, Arvind Agarwal, Debrupa Lahiri, Ankita Bisht, Srinivasa Rao Bakshi
The idea of composite materials has emerged from the requirement of light-weight materials with improved mechanical and physical properties like strength, toughness, thermal and electrical conductivity, and lower CTE for targeted applications. Fiber reinforced composites are very suitable for structural applications for their high strength and stiffness. Carbon nanotubes are strong contenders in this category, due to their superior elastic modulus, tensile strength, and thermal and electrical conductivity rather than conventional carbon fibers. CNTs could be the nanomaterial of choice for designing and tailoring metallic composites with an array of multiple property combinations not previously thought possible. Being vigorously researched for now for nearly three decades, production cost of multiwall CNTs has come down considerably, where 1 kg of quality CNTs can be attained for less than $1000 USD. The main problem associated with the fabrication of composite structure is the agglomeration of CNTs due to their high surface tension, resulting in poor properties (strength, electrical and thermal conductivity, etc.) than expected. The last decade of CNT-MMC research has seen exciting advances in the in situ observation of CNT strengthening mechanisms, new possible applications of CNTs in high-temperature applications, and better and more scalable fabrication routes that yield uniform dispersion of CNTs.
Design and Optimization of Glass Reinforced Composite Driveshafts for Automotive Industry
Published in Levent Aydin, H Seçil Artem, Selda Oterkus, Designing Engineering Structures Using Stochastic Optimization Methods, 2020
Melih Savran, Ozan Ayakdaş, Levent Aydin, M Eren Dizlek
Fiber-reinforced composite materials are used in the many industrial applications such as aerospace, automotive, and marine due to them having a lightweight and giving superior performance. They give many design possibilities utilizing the commutative stacking sequences and fiber orientation angles. Since the effects of the design parameters and stacking sequences are very complicated with the possible interactive relations among them, stochastic optimization approaches take a more active role for the composite design problems. On the other hand, usage of the composites had been started being employed instead of the leading traditional materials in the industry since the few last decades. Especially, since fiber-reinforced composite materials have gained significant importance in the automotive industry because of their relatively superior physical properties and main characteristics of them [1]. Fiber-reinforced composites generally composed of glass, carbon or hybrid (carbon & glass) fiber in the automotive main parts are due to having high strength in the fiber direction. These materials are durable and rigid; moreover, that might be saved in cost and weight thanks to optimum design.
Effect of UV aging on the thermo-mechanical properties of C-B-A and G-B-A hybrid composites: A study using TMA
Published in Mechanics of Advanced Materials and Structures, 2023
Munise Didem Demirbas, Zekiye Erdogan
High-performance fiber-reinforced composites offer excellent strength and stiffness properties, but their relatively high material and manufacturing cost, and their brittle, catastrophic failure without sufficient warning, limit their use in high-volume applications such as mass-produced automotive and construction. To expand their use, the development of high-performance ductile or pseudo-ductile composites with safe failure mechanisms similar to metals, with detectable warning and a wide margin before final failure, is of significant interest. However, adding ductility to composite materials is challenging as both traditional constituents of high-performance long fiber-reinforced thermoset polymer matrix composites are brittle [1–3]. Researchers have investigated various approaches to improve the ductility of composites such as modified matrix systems, new ductile fibers, and modified composite architecture [4–5].
Plane wave propagation in a fiber-reinforced thermoelastic rotating medium with variable thermal conductivity under modified Green–Lindsay model
Published in Waves in Random and Complex Media, 2022
Kapil Kumar Kalkal, Sunil Kumar, Aarti Kadian
Fiber-reinforced composites are broadly used in a variety of structures due to their light weight design potential, good corrosion resistance, high tensile strength and specific stiffness. These materials have many applications in aerospace, automotive, medical technology, energy and sports sectors, etc. The initial investigation of elastic properties of fiber-reinforced materials was carried out by Hashin and Rosen [22] which was further extended by Pipkin [23] and Rogers [24]. Effects of magnetic field, gravity and moving heat source on two-dimensional fiber-reinforced medium were considered by Ma and Duan [25] by introducing the fractional theory of thermoelasticity. Deswal et al. [26] considered the reflection phenomenon for a fiber-reinforced magneto-thermoelastic half-space with diffusion and two temperatures. Recently, Hobiny and Abbas [27] studied the thermodynamical interactions in a fiber-reinforced medium under Green–Naghdi model of type III.
Plane wave propagation in a fiber-reinforced diffusive magneto-thermoelastic half space with two-temperature
Published in Waves in Random and Complex Media, 2022
Sunita Deswal, Sunil Kumar, Kavita Jain
Fiber-reinforced composite materials consist of fibers of high strength and modulus embedded in or bonded to a matrix with distinct interfaces (boundaries) between them. In this form, both fibers and matrix retain their physical and chemical identities, yet they produce a combination of properties that cannot be achieved with either of the constituents acting alone. Fiber-reinforced polymer composites are lightweight, noncorrosive, exhibit high strength and specific stiffness and can be tailored to satisfy performance requirements. Due to these advantageous characteristics, these composites have been included in construction and rehabilitation of structures through their use as reinforcement in electronics, building construction, furniture, power industry, oil industry, medical industry and industrial products, etc. Spencer [1] explained the concept of deformation in fiber-reinforced materials. Belfield et al. [2] investigated the stresses in elastic plates reinforced by fibers lying in concentric circles. Sengupta and Nath [3] discussed the problem of surface waves in a fiber-reinforced anisotropic elastic medium. They derived the frequency equation for the surface waves. One can find some work on dynamical interactions in fiber-reinforced thermoelastic medium in the literature [4–6].