Tuning the Center of Gravity of 3D Printed Artifacts

Download

1-s2.0-S2351978918311752-main.pdf

Date

2018-06-14

Author

KELEŞ, Mert
Yaman, Ulaş

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

131
views

101
downloads

In this study, we propose an Algorithms-Aided Design (AAD) approach to shift the center of gravity of 3D printed artifacts to a predefined location by creating a heterogeneous internal structure utilizing the same type of material. When the conventional design and fabrication pipeline of 3D printers and additive manufacturing machinery is employed, information about the interior of the artifacts is lost during the conversion of the design files to the STL file format. This de facto file standard only stores the boundary information of the objects. Even though the designed artifact has heterogeneous interior in the Computer Aided Design (CAD) software, after the conversion it becomes a homogeneous solid. Our method does not require an STL file, since we are using a query-based approach in which the built-in algorithm communicates with CAD software to acquire the necessary information about the design for manufacturing. According to the proposed pipeline, the designed artifact in CAD software is first decomposed into voxels having predefined sizes with AAD add-on software. Then, the desired center of gravity and the amount of extra material available are entered by the user and this additional material is distributed to the voxels by our developed algorithm so that the center of gravity of the final artifact is at the predefined location. At the end of the design process, filling percentages of some voxels is altered which made the structure internally heterogeneous. Then the final structure is directly sliced and the trajectories are converted to G-codes. Using the generated file, artifacts are printed on a desktop FFF printer. With the developed algorithm, we can modify the coordinates of the center of gravity of any shape by adjusting their interior structures and fabricate them on FFF printers. (C) 2018 The Authors. Published by Elsevier B.V.

Subject Keywords

Additive manufacturing, FFF, FDM, Center of gravity

URI

https://hdl.handle.net/11511/39903

DOI

https://doi.org/10.1016/j.promfg.2018.10.059

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Topology optimization of 2.5D parts using the SIMP method with a variable thickness approach Kandemir, Volkan; Doğan, Oğuz; Yaman, Ulaş (Elsevier BV; 2018-06-10) In this study, the Solid Isotropic Material with Penalization (SIMP) topology optimization method is employed on the artifacts via keeping the penalization factor as unity. When the penalization is not carried out, the finite elements of the artifact have intermediate material densities. These density values are then used as the thicknesses of the corresponding finite elements and conformal surfaces are formed utilizing these heights in the proposed method. We evaluated the performance of the method with th...
Layout optimization of trusses using simulated annealing Hasançebi, Oğuzhan (2000-09-08) This paper addresses to the development of a simulated annealing (SA) based solution algorithm which is automated to achieve the simultaneous optimum design of truss type structures with respect to size, shape and topology design variables. The proposed algorithm is designed in such a way that together with applicability to practical design problems, it is also aimed at producing efficient and improved design solutions for the problems of interest. From the practicality point of view, the task is chosen as ...
Optimization of Power Conversion Efficiency in Threshold Self-Compensated UHF Rectifiers With Charge Conservation Principle Gharehbaghi, Kaveh; KOÇER, FATİH; Külah, Haluk (2017-09-01) This paper presents a compact model for threshold self-compensated rectifiers that can be used to optimize circuit parameters early in the design phase instead of time-consuming transient simulations. A design procedure is presented for finding the optimum aspect ratio of transistors used in the converter and number of rectifying stages to achieve the maximum power conversion efficiency. In the presented analysis, the relation between the power conversion efficiency and the load current over the variation o...
Optimizing Single-Span Steel Truss Bridges with Simulated Annealing Hasançebi, Oğuzhan (2010-11-01) This study presents applications of a simulated annealing integrated solution algorithm to the optimum design of single-span steel truss bridges subjected to gravity loadings. In the optimum design process of a bridge the members are sized simultaneously as the coordinates of the upper chord nodes are determined such that the least design weight is attained for the structure. The design constraints and limitations are imposed in accordance with serviceability and strength provisions of ASD-AISC (Allowable S...
Design of a high precision hybrid AM machine Yılmaz, Yunus Emre; Dölen, Melik; Department of Mechanical Engineering (2019) Precision requirements in fused deposition modelling (FDM) processes have been increasing in recent years, especially after recognizing the potential of FDM process to produce complex and functional components. In order to increase precision of FDM process, 6-axis hybrid manufacturing system, which can carry out additive- and subtractive manufacturing processes in one manufacturing system platform, is designed. During design, kinematic analysis of the machine is done, axial- and angular errors are estimated...

Citation Formats

M. KELEŞ and U. Yaman, “Tuning the Center of Gravity of 3D Printed Artifacts,” 2018, vol. 17, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39903.