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Continuous Property Gradation for Multi-material 3D-printed Objects

Altenhofen, Christian and Luu, Thu Huong and Grasser, Tim and Dennstädt, Marco and Mueller-Roemer, Johannes and Weber, Daniel and Stork, André (2018):
Continuous Property Gradation for Multi-material 3D-printed Objects.
In: Solid Freeform Fabrication 2018: Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, Austin, Tex., University of Texas, In: Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, Austin, TX, USA, 2018, [Online-Edition: http://publica.fraunhofer.de/urns/urn:nbn:de:0011-n-512629-1...],
[Conference or Workshop Item]

Abstract

Modern AM processes allow for printing multiple materials. The resulting objects can be stiff/dense in some areas and soft/porous in others, resulting in distinct physical properties. However, modeling material gradients is still tedious with current approaches, especially when smooth transitions are required. Current approaches can be distinguished into a) NURBS-BReps-based and b) voxel-based. In case of NURBS-BReps, discrete material distributions can be modeled by manually introducing separate shells inside the object; smooth gradation can only be approximated in discrete steps. For voxel representations, gradation is discrete by design and comes along with an approximation error. In addition, interacting on a per-voxel basis is tedious for the designer/engineer. We present a novel approach for representing material gradients in volumetric models using subdivision schemes, supporting continuity and providing elegant ways for interactive modeling of locally varying properties. Additionally, the continuous volumetric representation allows for on-demand sampling at any resolution required by the 3D printer.

Item Type: Conference or Workshop Item
Erschienen: 2018
Creators: Altenhofen, Christian and Luu, Thu Huong and Grasser, Tim and Dennstädt, Marco and Mueller-Roemer, Johannes and Weber, Daniel and Stork, André
Title: Continuous Property Gradation for Multi-material 3D-printed Objects
Language: English
Abstract:

Modern AM processes allow for printing multiple materials. The resulting objects can be stiff/dense in some areas and soft/porous in others, resulting in distinct physical properties. However, modeling material gradients is still tedious with current approaches, especially when smooth transitions are required. Current approaches can be distinguished into a) NURBS-BReps-based and b) voxel-based. In case of NURBS-BReps, discrete material distributions can be modeled by manually introducing separate shells inside the object; smooth gradation can only be approximated in discrete steps. For voxel representations, gradation is discrete by design and comes along with an approximation error. In addition, interacting on a per-voxel basis is tedious for the designer/engineer. We present a novel approach for representing material gradients in volumetric models using subdivision schemes, supporting continuity and providing elegant ways for interactive modeling of locally varying properties. Additionally, the continuous volumetric representation allows for on-demand sampling at any resolution required by the 3D printer.

Title of Book: Solid Freeform Fabrication 2018: Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference
Place of Publication: Austin, Tex.
Publisher: University of Texas
Uncontrolled Keywords: 3D Printing, Subdivision, Material properties, Volume models
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
Event Title: Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference
Event Location: Austin, TX, USA
Event Dates: 2018
Date Deposited: 11 Jul 2019 12:38
Official URL: http://publica.fraunhofer.de/urns/urn:nbn:de:0011-n-512629-1...
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