Fluid Flow-inspired Curvature-aware Print-paths from Hexahedral Meshes for Additive Manufacturing

Serhat Cam*, Erkan Gunpinar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Thanks to recent improvements, computational methods are able to produce high-quality hexahedral meshes, whose hexahedrons are arranged along the principal curvature directions of the input surfaces. Curvature-aware print-paths following these curvature directions have been recently proposed by Gunpinar and enable reduction in stair-stepping effect in the printed parts. However, crosswise contacts can exist between the print-paths (i.e., print-paths are quasi-perpendicular to each other), which is undesirable as failures may occur particularly at those contact regions. Therefore, the present work aims at generation of curvature-aware print-paths without crosswise contacts between them. To solve this problem, we inspire from fluid flow and imitate (laminar) streamlines for an inlet and an outlet of a duct for designing print-paths. A hexahedral mesh is decomposed into blocks (cuboid-like sub-volumes), each of which is covered with fluid flow-inspired print-paths. A multi-axis (collision-free) additive manufacturing (AM) planning technique is also proposed. As a proof of concept, fluid flow-inspired curvature-aware print-paths are validated using a multi-axis AM simulator and machine.

Original languageEnglish
Article number103500
JournalCAD Computer Aided Design
Volume159
DOIs
Publication statusPublished - Jun 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

Funding

The authors would like to thank Umut Can Coskun to provide images of streamlines for fluid flow, Alper Tasmektepligil and Arash Armanfar for their valuable discussions during validating print-paths via AM simulator, Elena Gaidar and Fedor Gridnev from 5AxisMaker company for their technical support about additive manufacturing and Scientific Research Center of Istanbul Technical University for supporting this research (Project Number: 44308 ).

FundersFunder number
Istanbul Teknik Üniversitesi44308

    Keywords

    • Fluid flow
    • Hexahedral mesh
    • Multi-axis additive manufacturing
    • Print-paths

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