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  4. Geometric distortion-compensation via transient numerical simulation for directed energy deposition additive manufacturing
 
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2020
Journal Article
Titel

Geometric distortion-compensation via transient numerical simulation for directed energy deposition additive manufacturing

Abstract
Components distort during directed energy deposition (DED) additive manufacturing (AM) due to the repeated localised heating. Changing the geometry in such a way that distortion causes it to assume the desired shape - a technique called distortion-compensation - is a promising method to reach geometrically accurate parts. Transient numerical simulation can be used to generate the compensated geometries and severely reduce the amount of necessary experimental trials. This publication demonstrates the simulation-based generation of a distortion-compensated DED build for an industrial-scale component. A transient thermo-mechanical approach is extended for large parts and the accuracy is demonstrated against 3d-scans. The calculated distortions are inverted to derive the compensated geometry and the distortions after a single compensation iteration are reduced by over 65%.
Author(s)
Biegler, Max
Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK
Elsner, B.A.M.
Graf, B.
Rethmeier, Michael
Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK
Zeitschrift
Science and technology of welding and joining
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DOI
10.1080/13621718.2020.1743927
Language
English
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Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK
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