Modeling and measurement of dielectric anisotropy in materials manufactured via fused filament fabrication processes

Title

Modeling and measurement of dielectric anisotropy in materials manufactured via fused filament fabrication processes

 Author

Hehenberger, S.P. (TU Delft Microwave Sensing, Signals & Systems; German Aerospace Center)
Caizzone, Stefano (German Aerospace Center)
Yarovoy, Alexander (TU Delft Microwave Sensing, Signals & Systems)

Date

2024

 Abstract

Additive manufacturing (AM) is increasingly recognized as an enabling technology for novel devices with increased functionality and bandwidth for microwave applications. However, due to the layer-by-layer build approach employed by most AM techniques, internal patterns are introduced to printed materials, which cause an effective anisotropy in their material parameters. An electrostatic model inspired by parallel plate capacitors, describing the dielectric anisotropy of materials manufactured with fused filament fabrication (FFF) AM techniques is proposed in this work. The accuracy of the model's predictions about the permittivity tensor of printed materials is investigated via numerical simulations. Furthermore, permittivity tensor measurements are carried out for samples printed with various materials and print settings. Measurement data is fitted to the model via a least squares approach, and excellent agreement is observed. Novel conclusions about the impact of material and print parameters on the effective permittivity of additively manufactured materials, improving the accuracy in modeling and designing additively manufactured microwave devices are drawn.


 Subject

Additive manufacturing
Dielectric anisotropy
Fused filament fabrication
Microwave material characterization
Modeling

 To reference this document use:

http://resolver.tudelft.nl/uuid:41be386c-5b84-4704-84d8-5ca28436441f

 DOI

https://doi.org/10.1016/j.materresbull.2024.112938

 Embargo date

2024-12-11

 ISSN

0025-5408

 Source

Materials Research Bulletin, 179

 Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2024 S.P. Hehenberger, Stefano Caizzone, Alexander Yarovoy
Files
file embargo until 2024-12-11