Browsing by Author "Velu, R."

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    Analysis and Fabrication of Functionally Graded Prosthetic Socket Using Fused Filament Fabrication
    (Springer Science and Business Media Deutschland GmbH, 2025) Teacher, M.; Mir, S.H.; Velu, R.
    Prosthetics are standard assistive devices that enable the partial movement of body parts lost due to dysvascular disorder or locomotive dysfunction. Conventionally fabricated prosthetics are stiff and lead to wounds and ulcers. As these devices require customization due to variations in the patient limb sizes, additive manufacturing (AM) provides an advantage in their fabrication. Therefore, it is necessary to design and develop a prosthetic socket from functional aspects. These aspects may be considered in two ways: graded from lattice structures and graded from polymer composites based on properties, such as deformation and elastic modulus. Simulation and analytical models optimize the modulus of elasticity and deformation corresponding to the material uses based on stiffness and flexibility. The gyroid-type lattice structures are used to provide lightweight and thermo-regulatory prosthetic sockets. However, the models become distorted due to the large size of STL files. Fused filament fabrication (FFF) of the AM technique fabricates the graded prosthetic socket based on the geometrical aspects. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
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    Laser aided metal additive manufacturing and postprocessing: A comprehensive review
    (Elsevier, 2021) Velu, R.; Kumar, A.V.; Balan, A.S.S.; Mazumder, J.
    In the recent industrial revolution (Industry 5.0), additive manufacturing (AM) will be a very interesting technology, and it is predicted that it will have a significant impact on a wide range of industries in the near future. AM involves many different processing techniques, such as powder bed fusion, directed energy deposition (DED), sheet lamination, and so on, and it can use many different feedstock materials such as metals, polymers, and ceramics. In this chapter, we focused our attention on laser-based AM techniques used to produce metal parts, specifically in selective laser melting and laser-assisted DED techniques. The chapter begins with a classification of lasers and the interaction of lasers with materials. Furthermore, a comprehensive review on the classification of laser-based AM processes, their working principle, relevance of laser processing, need for postprocessing, and a classification of postprocessing techniques are explained in detail. Finally, it is shown that AM processes must be combined in the near future with all traditional manufacturing technologies; however, laser-based AM techniques have an excellent opportunity to influence the current manufacturing sector. © 2021 Elsevier Inc. All rights reserved.