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Ulas Yaman

Bio: Ulas Yaman is an academic researcher from Middle East Technical University. The author has contributed to research in topics: Fused filament fabrication & Topology optimization. The author has an hindex of 8, co-authored 40 publications receiving 411 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a comprehensive review on additive manufacturing technologies is presented together with both its contributions to Industry 4.0, focusing on three important aspects of AM: recent advances on material science, process development, and enhancements on design consideration.

497 citations

Journal ArticleDOI
TL;DR: A comprehensive review of the current state-of-the-art in the field, covering the following three key aspects of the subject: advances in the hybridization of additive manufacturing processes, developments in process planning for integrated technologies, and insights into the hybrid additive manufacturing industry.
Abstract: Despite the rapid growth in the past decade, the industrial adoption of additive manufacturing has not still been achieved due to certain limitations. A recent trend to alleviate its inherent drawbacks is to integrate additive manufacturing with secondary production techniques. Indeed, hybrid additive manufacturing solutions may help overcome the current barriers to today’s production systems by making use of the combined merits of merging technologies. This paper presents a comprehensive review of the current state-of-the-art in the field, covering the following three key aspects of the subject: (i) advances in the hybridization of additive manufacturing processes, (ii) developments in process planning for integrated technologies, and (iii) insights into the hybrid additive manufacturing industry. The main objective of the paper is to classify the latest knowledge for the researchers, along with highlighting challenges and future research directions in this field.

41 citations

Journal ArticleDOI
TL;DR: 3D Voronoi-based heterogeneous printing is explored, and the slicing algorithm capitalizes on coherence and minimizes print head moves that do not deposit material to minimize non-extruding fast travels.
Abstract: We report on 3D printing of artifacts with a structured, inhomogeneous interior. The interior is decomposed into cells defined by a 3D Voronoi diagram and their sites. When printing such objects, most slices the printer deposits are topologically the same and change only locally in the interior. The slicing algorithm capitalizes on this coherence and minimizes print head moves that do not deposit material. This approach has been implemented on a client/server architecture that computes the slices on the geometry side. The slices are printed by fused deposition, and are communicated upon demand. Display Omitted We explore 3D Voronoi-based heterogeneous printing.We utilize Euler loops to minimize non-extruding fast travels.The motion paths of consecutive slices are almost the same.The motion paths are not generated from scratch at every slice.Only 3 local cases can arise when updating the motion paths.

31 citations

Journal ArticleDOI
TL;DR: An interior design methodology to compensate for the shrinkage in the holes of artifacts fabricated with desktop 3D printers employing fused deposition modeling process is presented in this paper, where various interior structures are constructed according to the geometric attributes of the artifacts.
Abstract: An interior design methodology to compensate for the shrinkage in the holes of artifacts fabricated with desktop 3D printers employing fused deposition modeling process is presented in this study. In the conventional way of compensating, the initial geometry is scaled according to the predictive and statistical models so that the critical dimensions will be more accurate when the part is cooled down. The proposed method employs a completely different paradigm. It constructs various interior structures to compensate for the shrinkage in the holes according to the geometric attributes of the artifacts. In other words, the method utilizes shrinkage as a tool to compensate for the shrinkage. Printed interior line segments, which are directly connected to the perimeter of the hole, simply pull the hole towards the inside of the artifact. In result, the dimensional accuracy of the hole is improved considerably. The measurements with a coordinate measuring machine and the numerical analysis revealed that the proposed design approach can decrease the dimensional error substantially compared to the conventional 3D printed parts.

30 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a constructive design for Fused Deposition Modelling (FDM) parts, where the shrinkage problem of the available polymer materials is considered.
Abstract: Dimensional accuracy of parts manufactured by Fused Deposition Modelling (FDM) greatly suffers from the shrinkage problems of the available polymer materials. This paper proposes a constructive ide...

27 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present an overview of the types of 3D printing technologies, the application of three-dimensional printing technology and lastly, the materials used for 3-D printing technology in manufacturing industry.

686 citations

Journal ArticleDOI
TL;DR: In this paper, a comprehensive review on additive manufacturing technologies is presented together with both its contributions to Industry 4.0, focusing on three important aspects of AM: recent advances on material science, process development, and enhancements on design consideration.

497 citations

Journal ArticleDOI
TL;DR: In this article, the state-of-the-art developments in the design for additive manufacturing (DfAM) and structural optimisation, becomes vital for successfully shaping the future AM-landscape.

330 citations

Journal ArticleDOI
TL;DR: Artificial Intelligence, Service and Policy Framework, and Circular Economy are significant enablers connecting CE and Industry 4.0 in a supply chain and Interface Designing and Automated Synergy Model are the most significant challenges.

305 citations

Journal ArticleDOI
TL;DR: In this paper, the authors identified a set of challenges (framework) for implementing Industry 4.0 in manufacturing industries and evaluated them using a novel multi-criteria decision-making method named Best-Worst method (BWM).

242 citations