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Structural Optimization of printed structures by self-organizied relaxation

Zocca, Andrea and Gomes, Cynthia and Linow, Ulf and Marx, Heidi and Melcher, Jörg and Colombo, Paolo and Günster, Jens (2016) Structural Optimization of printed structures by self-organizied relaxation. Rapid Prototyping Journal, 22 (2), pp. 344-349. Emerald Group Publishing Limited 2016. ISSN 1355-2546

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Official URL: http://www.emeraldinsight.com/doi/full/10.1108/RPJ-07-2014-0087

Abstract

Purpose This paper aims to present an additive manufacturing-based approach in which a new strategy for a thermally activated local melting and material flow, which results in densification of printed structures, is introduced. Design/methodology/approach For enabling this self-organized relaxation of printed objects by the viscous flow of material, two interconnected structures are printed simultaneously in one printing process, namely, Structure A actually representing the three dimensional object to be built and Structure B acting as a material reservoir for infiltrating Structure A. In an additional process step, subsequent to the printing job, an increase in the objects’ temperature results in the melting of the material reservoir B and infiltration of structure A. Findings A thermally activated local melting of the polymethylsilsesquioxane results in densification of the printed structures and the local formation of structures with minimum surface area. Originality/value The present work introduces an approach for the local relaxation of printed three-dimensional structures by the viscous flow of the printed material, without the loss of structural integrity of the structure itself. This approach is not restricted only to the materials used, but also offers a more general strategy for printing dense structures with a surface finish far beyond the volumetric resolution of the 3D printing process.

Item URL in elib:https://elib.dlr.de/117295/
Document Type:Article
Title:Structural Optimization of printed structures by self-organizied relaxation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zocca, AndreaBAMUNSPECIFIED
Gomes, CynthiaBAMUNSPECIFIED
Linow, UlfBAMUNSPECIFIED
Marx, HeidiBAMUNSPECIFIED
Melcher, JörgDLR-Institut für Faserverbundleichtbau und AdaptronikUNSPECIFIED
Colombo, PaoloBAMUNSPECIFIED
Günster, JensBAMUNSPECIFIED
Date:28 April 2016
Journal or Publication Title:Rapid Prototyping Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:22
Page Range:pp. 344-349
Publisher:Emerald Group Publishing Limited 2016
ISSN:1355-2546
Status:Published
Keywords:Additive manufacturing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems
Deposited By: Melcher, Dr.-Ing. Jörg
Deposited On:18 Dec 2017 07:21
Last Modified:31 Jul 2019 20:14

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