Czekanski, Aleksander et Etiwa, Ragab.
2025.
« Effect of raster angles on the anisotropic behavior of 3D-printed TPU under uniaxial and planar loading conditions ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
Prévisualisation |
PDF
166 - Effect of raster angles on the ani.pdf - Version publiée Licence d'utilisation : Tous les droits réservés aux détenteurs du droit d'auteur. Télécharger (1MB) | Prévisualisation |
Résumé
Thermoplastic polyurethane (TPU) is typically modeled as an isotropic hyperelastic material. However, when fabricated using fused deposition modeling (FDM), it exhibits anisotropic behavior due to directional filament alignment. This study investigates the effects of raster orientation and layer height on the mechanical performance of 3D-printed TPU using uniaxial and planar tensile tests. Four raster angles (0°, 90°, 0/90°, and -45/45°) were tested under uniaxial loading, while planar tests used 0° and 90° orientations. The 0° raster, aligned with the loading direction, showed the highest tensile strength (~9.5 MPa), modulus (~22.85 MPa), and elongation (>250%). The 90° raster displayed the lowest performance, with early failure (~90-100% strain), lower strength (~4-8 MPa), and reduced stiffness (~19.34 MPa), due to weak interlayer bonding. Bidirectional raster angle showed intermediate responses. Planar tensile results confirmed this anisotropy, with 0° specimens reaching ~20 MPa and 230% strain, while 90° specimens failed at ~5 MPa and ~50-60% strain. Microscopy images revealed that reducing layer height from 0.24 mm to 0.18 mm improved interlayer bonding but narrowed raster-to-raster bond widths. These results highlight the strong influence of printing parameters on TPU anisotropy and the need for constitutive models that account for directional effects in 3D-printed soft materials.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:09 |
| Dernière modification: | 18 déc. 2025 15:09 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32382 |
Actions (Authentification requise)
 |
Dernière vérification avant le dépôt |