Djokikj, Jelena

Preferred name

Djokikj, Jelena

Official Name

Djokikj, Jelena

jelena.djokikj@mf.edu.mk

Researcher ID

HSG-6264-2023

Now showing 1 - 10 of 18

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Mechanical properties of parts fabricated with additive manufacturing: A review of mechanical properties of fused filament fabrication parts
(Scientific Technical Union of Mechanical Engineering, 2022)
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Hadzieva, Bojana
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A review of fused deposition modeling process: parameter optimization, materials, and design
(ICAMTAFDM 2022: International Conference on Additive Manufacturing Technologies, Applications and Fused Deposition Modelling, 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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Introducing additive manufacturing and augmented reality in the conceptual phase of the design process.
(Serbian Association of Geometry and Graphics, 2020)
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Integrating parametric design and additive manufacturing knowledge in industrial design education
(Elsevier BV, 2022)
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Angeleska, Elena
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Design for Sustainability: A Review
(SCIENTIFIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY-4.0, 2023-11-08)
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ustainability is topic of great concern since the last decade and still today does not lose of its popularity. Reason for that is that the contemporary way of living is causing great damages to the environment. Designers have been talking about changing the ways in which the products are designed in order to have sustainable product. But, for achieving sustainability many aspects need to be addressed, such as: cultural, social, economical and technological. Nowadays, we believe that these aspects are on higher level and we can talk about sustainable design. Every product development process starts with the design phase and this is why we believe that it is most important for making improvements of the products. In this paper we have the premise that good and appropriate design can have positive influence on the sustainability. In order to check the validity of the premise we are reviewing paper dealing with sustainability, eco design, and engineering materials.
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Mechanical properties of parts fabricated with additive manufacturing: A review of mechanical properties of fused filament fabrication parts
(2022)
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Hadjieva, Bojana
Additive Manufacturing (AM) Technologies are in constant development since their emergence in the late 80s. However, standardization is still in its infancy, owing to the numerous changing variables in each process. One of the most common are the material extrusion process, in which thermoplastic is extruded, also known as fused filament fabrication (FFF). The popularity of this process is due to the relatively simple method as well as the relatively good mechanical properties of the fabricated parts. There are numerous research studies evaluating mechanical properties because the FFF process allows for the investigation of many variables and the production of many parts with a wide range of characteristics. But how good are those characteristics in reality, and how good do we need them to be? It all depends on the application for which those parts are required.
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E. Doncheva, M.Petreski, A.Krstevska N.Avramov, J.Djokikj, “Sustainability assessment of welding processes: a review “, IIW 2022 International Conference on Welding and Joining - Innovative Welding and Joining Technologies to achieve Carbon Neutrality and promote Sustainable Development, (21-23.07.2022), Tokyo, Japan, Program | IIW2022.
(The International Institute of Welding (IIW), 2022-07-21)
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Petreski, Martin
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Krstevska, Aleksandra
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Over the past several years, sustainability has become an important performance metric in industry and a significant driver for the development of innovative concepts and technologies, taking into account economic, social and environmental aspects. Welding is one of the major techniques used in manufacturing industries that requires a large amount of energy and resources and also it is considered dangerous to health and the environment. Energy-saving and constraints in carbon emissions have become a priority in the manufacturing sector therefore, the minimum energy-oriented sustainable welding processes are highly recommended. This paper aims to provide a structured overview of the wide field of research in sustainable production with a focus on the sustainability assessment of welding processes. It describes and outlines the available methodologies used and explores the most recent advances in the field. Based on a broad literature review, research gaps are identified and the scope of future work is discussed. Furthermore, this paper contributes to the advancement of current practices in measuring and assessing the sustainability of welding processes.
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Sustainability and application of life cycle assessment in welded structures
(SCIENTIFIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY-4.0, 2023-01-08)
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Krstevska, Aleksandra
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Petreski, Martin
As global environmental impacts have increased, modern societies have expressed a strong interest in implementing sustainable solutions to reduce emissions and use operational energy and natural resources. The construction industry is a leading promoter of significant environmental impacts because it consumes a significant amount of water, energy, and materials. Steel and welding are critical in all three major sectors of the industry: construction, infrastructure, and industry. This paper discusses the significance of meeting sustainable development goals in welded structures and identifies ways that this industry can help to reduce environmental impact and improve employment conditions while achieving economic growth, saving time, and maintaining structural quality. The paper discusses how to optimize various aspects ranging from raw material extraction to construction waste disposal using the life cycle assessment (LCA) methodology. It provides a starting point and demonstrates how these tools can contribute to more sustainable welded structures.
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Mechanical properties of parts fabricated with additive manufacturing: A review of mechanical properties of fused filament fabrication parts
(SCIENTIFIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY-4.0, 2022-10-07)
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Hadjieva, Bojana
Additive Manufacturing (AM) Technologies are in constant development since their emergence in the late 80s. However, standardization is still in its infancy, owing to the numerous changing variables in each process. One of the most common are the material extrusion process, in which thermoplastic is extruded, also known as fused filament fabrication (FFF). The popularity of this process is due to the relatively simple method as well as the relatively good mechanical properties of the fabricated parts. There are numerous research studies evaluating mechanical properties because the FFF process allows for the investigation of many variables and the production of many parts with a wide range of characteristics. But how good are those characteristics in reality, and how good do we need them to be? It all depends on the application for which those parts are required.
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Nanomaterials: Properties and Applications in Structural Engineering
(SCIENTICIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY 4.0, 2022-01-24)
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Nanotechnology has grown in popularity due to the enormous potential for producing materials and products with diverse properties, allowing significant advancement of existing technology and the development of new innovative technologies. Nanomaterials behave differently at the nanoscale than their conventional counterparts, opening exciting new possibilities in a wide range of construction applications. Nonetheless, the lack of information on nanomaterials' suitability, high costs, and health risks limits their use in construction and structural engineering. As a result, research must be conducted to provide accurate information and facts about the properties and performance of nanomaterials under various load conditions, as well as information on the advantages of using nanomaterials over other construction materials. This paper provides information on nanomaterial properties and how they affect structural materials' microstructure and mechanical properties. It also demonstrates the benefits of using nanotechnology and suggests new possibilities.

Djokikj, Jelena

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