Faculty of Mechanical Engineering

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    A review of fused deposition modeling process: parameter optimization, materials, and design
    (2022-07-21)
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    Hadjieva, Bojana
    In the past decade, additive manufacturing technology or 3D printing has been promoted as an efficient method for fabricating hybrid composite materials and structures with superior mechanical properties and complex shape and geometry. Fused deposition modeling (FDM) process is commonly used additive manufacturing technique for production of polymer products. Therefore, many studies and experiments are focused on investigating the possibilities for improving the obtained results on product properties as a key factor for expanding the spectrum of their application. This article provides an extensive review on recent research advances in FDM and reports on studies that cover the effects of process parameters, material and design of the product properties. The paper conclusions provide a clear up-to date information for optimum efficiency and enhancement of the mechanical properties of 3D printed samples and recommends further research work and investigations.
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    METAL ADDITIVE MANUFACTURING WITH TOPOLOGY OPTIMIZATION METHODOLOGY FOR INNOVATIVE STRUCTURAL DESIGN
    (Faculty of technical science, Novi Sad, Srbia, 2023-10-05)
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    Petreski, Martin
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    Metal additive manufacturing (MAM) is an exciting manufacturing process that has recently received a lot of scientific attention due to its ability to develop stress-optimized structural elements and products in a material-efficient, cost-effective manner. Indeed, MAM also known as rapid prototyping or three-dimensional printing of metal products, is one of the most promising aspects of manufacturing highly complex geometries. It is now regarded as a source of opportunities for achieving true design optimized manufacturing through topology optimization methodology. This methodology can improve material distribution by generating complex geometries that are easily built layer by layer using data from a three-dimensional (3D) model. The article is intended to explore the current state of process development and investigates the future potential of topology-optimized design approaches for MAM in developing lightweight and effective products. It discusses the most recent research efforts and topology optimization applications on various products and how current techniques can produce structural elements with significant weight reduction. The study demonstrates the need for additional research in industrial structure optimization and design, and it emphasizes the importance of integrating appropriate material, process, structure efficiency, and performance characterization when using topology optimization to pursue flexible and high-performance products.
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    WIRE-ARC ADDITIVE MANUFACTURING: RECENT DEVELOPMENTS AND POTENTIAL
    (The Academy of Applied Technical Studies Belgrad, 2023-12-15)
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    Krstevska, Aleksandra
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    Wire-arc additive manufacturing (WAAM) is a promising technology for producing medium and large components without traditional subtracting technologies. It is a hybrid of two manufacturing techniques: additive manufacturing and welding. The use of this technology has grown significantly due to advantages such as material and energy savings while achieving high deposition rates and low cost. However, there are some issues with microstructure homogeneity, and properties are affected due to the complexity of the arc-induced thermal cycles and metallurgical mechanisms, resulting in high residual stresses, distortion, porosity, cracks, and delamination. This article summarises the progress made in the field of wire additive manufacturing, with a focus on welding systems, tool path design software, material analysis, and control systems. It also highlights some critical aspects that must be addressed to ensure high-quality production, such as control and diagnosis mechanisms for defect monitoring, the effects of parameters and their optimisation possibilities for improving quality, ensuring process stability, and possible post-deposition heat treatments. The conclusions suggest further improvements to the wire-additive manufacturing process in terms of accuracy, reliability, and efficacy, as well as future applications of the technology and research activities.