PROGRAMMABLE DAMAGE LOCALIZATION THROUGH SPATIAL TOOLPATH ENGINEERING IN 3D PRINTING

Creative Commons License

Ülke İ.

14. INTERNATIONAL EUROPEAN CONGRESS ON ADVANCED SCIENTIFIC RESEARCH, Zürich, İsviçre, 3 - 06 Eylül 2026, ss.840-847, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Zürich
  • Basıldığı Ülke: İsviçre
  • Sayfa Sayıları: ss.840-847
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Gazi Üniversitesi Adresli: Evet

Özet

Additive manufacturing enables the fabrication of components with complex geometries. However, the mechanical response of printed parts is generally optimized to maximize strength rather than to control where damage initiates. This study introduces a proof-of-concept approach for programmable damage localization through spatial toolpath engineering in material extrusion-based 3D printing. The proposed concept is based on locally modifying raster orientations within predefined regions of a tensile specimen while maintaining identical material, geometry, printing parameters, and infill density. Initially, homogeneous specimens with raster orientations of 0°, 45°, and 90° are manufactured by 3D printing to establish a reference database describing the influence of raster orientation on tensile behavior. Subsequently, heterogeneous specimens incorporating a localized raster-modified region are produced to investigate whether damage initiation can be intentionally directed to a predetermined location. Tensile tests are conducted to evaluate mechanical performance and fracture behavior, and the effectiveness of spatial toolpath engineering for damage localization is assessed by comparing homogeneous and heterogeneous specimens. The proposed methodology demonstrates the feasibility of using raster orientation as a design parameter for controlling the spatial distribution of damage rather than solely improving structural strength. This work provides a foundation for programmable mechanical behavior in additively manufactured structures and establishes a new perspective for damage-aware design in 3D printing.