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<p>The behavior of PA66 Nylon in 3D printing was investigated by considering two experimental groups based on extruder temperature, standard filling patterns, and Intelligent Infill Design, seeking to maximize tensile strength and minimize porosity. Three simple standard filling patterns (starred, concentric, and linear) and two Intelligent Infill Designs from CAD (starred–concentric and starred–linear) were compared, keeping constant the 80% infill along with the weight of the specimens. UTS reached up to 26&#xa0;MPa for the concentric pattern, while the best optimization was achieved with the starred–linear pattern, reaching 36&#xa0;MPa and a porosity of 13.5% at 280°C, showing that extrusion temperature improved the UTS of the Intelligent Infill Design specimens. The failure mechanism was plastic or brittle deformation for the standard infill patterns, while the Intelligent Infill Design did not exhibit any visible plastic deformation. Therefore, the Intelligent Infill Design impacted the physical and mechanical properties of the material.</p> Graphical abstract <p></p>

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Improving the mechanical performance of 3D printed nylon through intelligent infill design

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Sandra L. Rodríguez Reyna,
  • Jorge H. Díaz Aguilera,
  • Héctor R. Acevedo Parra,
  • Fidencio Tapia

摘要

The behavior of PA66 Nylon in 3D printing was investigated by considering two experimental groups based on extruder temperature, standard filling patterns, and Intelligent Infill Design, seeking to maximize tensile strength and minimize porosity. Three simple standard filling patterns (starred, concentric, and linear) and two Intelligent Infill Designs from CAD (starred–concentric and starred–linear) were compared, keeping constant the 80% infill along with the weight of the specimens. UTS reached up to 26 MPa for the concentric pattern, while the best optimization was achieved with the starred–linear pattern, reaching 36 MPa and a porosity of 13.5% at 280°C, showing that extrusion temperature improved the UTS of the Intelligent Infill Design specimens. The failure mechanism was plastic or brittle deformation for the standard infill patterns, while the Intelligent Infill Design did not exhibit any visible plastic deformation. Therefore, the Intelligent Infill Design impacted the physical and mechanical properties of the material.

Graphical abstract