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  • Open Access

    ARTICLE

    Application of Multi-Criteria Decision and Simulation Approaches to Selection of Additive Manufacturing Technology for Aerospace Application

    Ilesanmi Afolabi Daniyan1,*, Rumbidzai Muvunzi2, Festus Fameso3, Julius Ndambuki3, Williams Kupolati3, Jacques Snyman3

    CMC-Computers, Materials & Continua, Vol.83, No.2, pp. 1623-1648, 2025, DOI:10.32604/cmc.2025.062092 - 16 April 2025

    Abstract This study evaluates the Fuzzy Analytical Hierarchy Process (FAHP) as a multi-criteria decision (MCD) support tool for selecting appropriate additive manufacturing (AM) techniques that align with cleaner production and environmental sustainability. The FAHP model was validated using an example of the production of aircraft components (specifically fuselage) employing AM technologies such as Wire Arc Additive Manufacturing (WAAM), laser powder bed fusion (L-PBF), Binder Jetting (BJ), Selective Laser Sintering (SLS), and Laser Metal Deposition (LMD). The selection criteria prioritized eco-friendly manufacturing considerations, including the quality and properties of the final product (e.g., surface finish, high strength,… More >

  • Open Access

    ARTICLE

    Finite Element Modeling of Thermo-Viscoelastoplastic Behavior of Dievar Alloy under Hot Rotary Swaging

    Josef Izák1,*, Marek Benč2, Petr Opěla2

    CMES-Computer Modeling in Engineering & Sciences, Vol.142, No.3, pp. 3115-3133, 2025, DOI:10.32604/cmes.2025.059234 - 03 March 2025

    Abstract The paper deals with the FEM (Finite Element Method) simulation of rotary swaging of Dievar alloy produced by additive manufacturing technology Selective Laser Melting and conventional process. Swaging was performed at a temperature of 900°C. True flow stress-strain curves were determined for 600°C–900°C and used to construct a Hensel-Spittel model for FEM simulation. The process parameters, i.e., stress, temperature, imposed strain, and force, were investigation during the rotary swaging process. Firstly, the stresses induced during rotary swaging and the resistance of the material to deformation were investigated. The amount and distribution of imposed strain in… More >

  • Open Access

    ARTICLE

    Parametric Analysis and Designing Maps for Powder Spreading in Metal Additive Manufacturing

    Yuxuan Wu, Sirish Namilae*

    CMES-Computer Modeling in Engineering & Sciences, Vol.142, No.2, pp. 2067-2090, 2025, DOI:10.32604/cmes.2024.059091 - 27 January 2025

    Abstract Powder bed fusion (PBF) in metallic additive manufacturing offers the ability to produce intricate geometries, high-strength components, and reliable products. However, powder processing before energy-based binding significantly impacts the final product’s integrity. Processing maps guide efficient process design to minimize defects, but creating them through experimentation alone is challenging due to the wide range of parameters, necessitating a comprehensive computational parametric analysis. In this study, we used the discrete element method to parametrically analyze the powder processing design space in PBF of stainless steel 316L powders. Uniform lattice parameter sweeps are often used for parametric… More >

  • Open Access

    ARTICLE

    Revolutionizing Biodegradable and Sustainable Materials: Exploring the Synergy of Polylactic Acid Blends with Sea Shells

    Prashanth K P1,*, Rudresh M2, Venkatesh N3, Poornima Gubbi Shivarathri4, Shwetha Rajappa5

    Journal of Renewable Materials, Vol.12, No.12, pp. 2115-2134, 2024, DOI:10.32604/jrm.2024.055437 - 20 December 2024

    Abstract This study explores the mechanical properties of a novel composite material, blending polylactic acid (PLA) with sea shells, through a comprehensive tensile test analysis. The tensile test results offer valuable insights into the material’s behavior under axial loading, shedding light on its strength, stiffness, and deformation characteristics. The results suggest that the incorporation of sea shells decrease the tensile strength of 14.55% and increase the modulus of 27.44% for 15 wt% SSP (sea shell powder) into PLA, emphasizing the reinforcing potential of the mineral-rich sea shell particles. However, a potential trade-off between decreased strength and… More >

  • Open Access

    PROCEEDINGS

    Material-Structure Integrated Additive Manufacturing of Bio-Inspired Lightweight Metallic Components for Aerospace Applications

    Dongdong Gu1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.013403

    Abstract In this presentation, we will report our recent research progress and prospect in the fields of laser additive manufacturing (AM) / 3D printing (3DP) of high-performance/multi-functional lightweight metallic components for aerospace applications. The innovative elements of AM including multi-material layout, innovative structural design, tailored printing process, and resultant high performance and multiple functions of components will be addressed. For a tailored printing process, some key scientific issues in AM process control deserve to be studied, including interaction of energy and printed matter, thermodynamic and dynamic behavior of printing, relationship of process parameters, microstructure and properties. More >

  • Open Access

    PROCEEDINGS

    Additively Manufactured Dual-Faced Structured Fabric for Shape-Adaptive Protection

    Yuanyuan Tian1,2, Kun Zhou1,2,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.013372

    Abstract Fabric-based materials have demonstrated promise for high-performance wearable applications but are currently restricted by their deficient mechanical properties. Here, we leverage the design freedom offered by additive manufacturing and a novel interlocking pattern to for the first time fabricate a dual-faced chain mail structure consisting of three-dimensional re-entrant unit cells. The flexible structured fabric demonstrates high specific energy absorption and specific strength of up to 1530 J/kg and 5900 N·m/kg, respectively, together with an excellent recovery ratio of ~80%, thereby overcoming the strength–recoverability trade-off. The designed dual-faced structured fabric compares favorably against a wide range More >

  • Open Access

    PROCEEDINGS

    Additive Manufacturing of Stents for the Coarctation of Aorta

    Yi Huang1, Giovanni Biglino1, Fengyuan Liu2,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.013295

    Abstract Coarctation of aorta (CoA) is one of the congenital heart diseases with a proportion of 5% to 10%, which has a prevalence of four per 10,000 babies. As the most common cardiac defect missed at routine physical exams, CoA has a high undiagnosed rate of 60% to 80% in newborns before hospital discharge. The insertion of bare metal stents (BMS) with balloon dilatation is the useful method to reopen the narrow area of aorta. However, the stented vessel has a fixed diameter and cannot grow with the age, resulting in a relative restenosis and frequent… More >

  • Open Access

    PROCEEDINGS

    Wire Arc Directed Energy Deposited High Performance Aluminium Alloy

    Xuewei Fang1,2,*, Jiannan Yang1, Ke Huang1, Bingheng Lu1,2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.012410

    Abstract Wire and Arc Additive Manufacturing (WAAM) technology has the advantages of high-efficiency and low-cost to fabricate large-scaled components with medium-complexity. 2319 aluminum alloy is a widely used in aerospace and military industries. Problems of porosity, residual stress, distortion, and poor mechanical properties were focused on in this paper. The mechanism of defect formation during fabrication and strengthening mechanism of peening process were investigated. In order to learn the droplet transfer and molten pool flow behavior, CFD models of molten pools for the pulse mode of CMT (CMT + P) and pulse reverse polarity CMT mode… More >

  • Open Access

    PROCEEDINGS

    Mechanism of Crack Resistance and Strength-Ductility in Additive Manufacturing of High Entropy Alloys

    Pengda Niu1, Ruidi Li1,*, Tiechui Yuan1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, pp. 1-1, 2024, DOI:10.32604/icces.2024.012243

    Abstract In terms of grain refinement and component shape complexity, laser additive manufacturing (AM) is unmatched. This is exemplified by laser powder bed fusion (LPBF), whose rapid solidification and non-equilibrium metallurgy have expanded the understanding of ultra-fine grains and sub-stable organization among academics. At present, the reliability of LPBF components is being questioned by the industry due to the rapid heating and cooling cycles in AM processing, coupled with the extreme non-equilibrium heat-fluid-mass process, which renders LPBF printing vulnerable to metallurgical defects like microcracks and porosity. A significant impediment to the development of LPBF lies in… More >

  • Open Access

    PROCEEDINGS

    Additive Manufacturing of Energy Storage Devices

    Xiaocong Tian1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.32, No.2, 2024, DOI:10.32604/icces.2024.011810

    Abstract With the ever-growing demand for miniature electronics and portable devices, the need for new types of micro-sized, low-cost and high-performance electrochemical energy storage devices becomes a cutting-edge research frontier. Advanced manufacturing technology (such as 3D printing) has brought broad application prospects and new opportunities to the construction of advanced electrochemical energy storage materials and devices. With a focus on “advanced manufacturing of new energy storage materials and devices”, we carried out interdisciplinary research on 3D/4D printing of wearable miniature batteries and supercapacitors, integrable energy devices and systems. Notably, a universal 3D printing approach towards advanced More >

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