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<p>This study systematically examined the influence of cell geometry and orientation on the mechanical behavior of Onyx cellular topologies produced via fused filament fabrication. Distinct cellular topologies were designed and tested under quasi-static tensile loading in both in-plane and axial orientations of the cell geometry. The results demonstrated that the tensile strength of axial orientation consistently outperformed the in-plane orientation across all topologies. Notably, the triangular axial topology exhibited the highest Young’s modulus (470.28&#xa0;MPa), whereas the rectangular axial topology demonstrated the highest tensile strength (12.35&#xa0;MPa) and strength-to-mass ratio (1.95&#xa0;MPa/g). The tensile strength of the rectangular axial topology was approximately 73.2% greater than that of the rectangular in-plane topology, underscoring the substantial impact of cell orientation on mechanical behavior. Statistical analysis confirmed significant differences between the orientations of the cell geometries. Scanning electron microscopy was used for microstructural and fractographic analyses. Furthermore, grey relational analysis was employed for multi-objective optimization. The rectangular axial topology was revealed as the optimal combination for maximizing the strength-to-mass ratio and Young’s modulus. These findings provided critical insights for developing lightweight, high-performance structural components through additive manufacturing technologies.</p>

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Influence of Cell Geometry and Orientation on the Mechanical Behavior of Additively Manufactured Onyx Cellular Topologies

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Gopal B. Mudholkar,
  • Dhanraj B. Waghmare

摘要

This study systematically examined the influence of cell geometry and orientation on the mechanical behavior of Onyx cellular topologies produced via fused filament fabrication. Distinct cellular topologies were designed and tested under quasi-static tensile loading in both in-plane and axial orientations of the cell geometry. The results demonstrated that the tensile strength of axial orientation consistently outperformed the in-plane orientation across all topologies. Notably, the triangular axial topology exhibited the highest Young’s modulus (470.28 MPa), whereas the rectangular axial topology demonstrated the highest tensile strength (12.35 MPa) and strength-to-mass ratio (1.95 MPa/g). The tensile strength of the rectangular axial topology was approximately 73.2% greater than that of the rectangular in-plane topology, underscoring the substantial impact of cell orientation on mechanical behavior. Statistical analysis confirmed significant differences between the orientations of the cell geometries. Scanning electron microscopy was used for microstructural and fractographic analyses. Furthermore, grey relational analysis was employed for multi-objective optimization. The rectangular axial topology was revealed as the optimal combination for maximizing the strength-to-mass ratio and Young’s modulus. These findings provided critical insights for developing lightweight, high-performance structural components through additive manufacturing technologies.