Faculty of Mechanical Engineering
Permanent URI for this communityhttps://repository.ukim.mk/handle/20.500.12188/13
Browse
34 results
Search Results
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, AN OVERVIEW OF ADVANCED JOINING TECHNIQUES FOR POLYMER AND COMPOSITE MATERIALS(2022); Krstevska, Aleksandra - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Review of current welding technology and literature review of weld repair without post-weld heat treatment for X10CrMoVNb9-1 steel in dissimilar metal welds(Elsevier BV, 2025); ; ; Petreski, Martin - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A REVIEW STUDY ON HYDROGEN EMBRITTLEMENT OF STEEL(Society for Structural Integrity and Life and IMS Institute, 2024); A common and intricate phenomenon known as hydrogen embrittlement of steel is the deterioration of the mechanical properties of metal in relation to stress corrosion cracking. This phenomenon has been extensively studied, with numer-ous works proposed over the last two decades, but there is still a lack of unified solutions and a solid understanding of the phenomenon. The purpose of this paper is to provide a review of the literature and publications on hydrogen embrittlement in steel. It focuses on recent developments and methods that have contributed to a better understand-ing of the relationship between steel structure, properties, and performance, with a particular emphasis on hydrogen diffusion, characterisation, mechanisms, and prevention of hydrogen embrittlement in structural steel. Furthermore, the paper discusses recent advances in experimental and multi-scale modelling and proposes future studies to address challenges related to hydrogen embrittlement in steels. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental investigation on mechanical properties of FFF parts using different materials(ELSEVIER B.V., 2022-02-14); ; ; Hadjieva, BojanaFused filament fabrication (FFF) is one of the additive manufacturing processes that provides parts with finest mechanical properties. Different materials offer different mechanical properties of the part. In this research we investigated parts fabricated with polylactic acid (PLA), polycarbonate (PC) and polyethylene terephthalate glycol, PETG. Samples are designed according to the ASTM standards and fabricated under the same process parameters. The mean effect on the tensile strength and flexural strength have been studied. From the study it can be concluded that there is a difference in the results as expected. But we cannot say that there is one material with superior properties, simply different materials are suitable for different applications - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A review of fused deposition modeling process: parameter optimization, materials, and design(2022-07-21); ; ; Hadjieva, BojanaIn 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 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); ; 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 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); ; ; Hadjieva, BojanaAdditive 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nanomaterials: Properties and Applications in Structural Engineering(SCIENTIFIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY-4.0, 2022-10-07); 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nanomaterials: Properties and Applications in Structural Engineering(SCIENTICIC TECHNICAL UNION OF MECHANICAL ENGINEERING INDUSTRY 4.0, 2022-01-24); 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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Mechanical properties of parts fabricated with additive manufacturing: A review of mechanical properties of fused filament fabrication parts(2022); ; ; Hadjieva, BojanaAdditive 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.