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<p>It is still challenging to develop mechanical metamaterials featuring well-balanced elastic isotropy, high specific stiffness and high specific strength for lightweight structural engineering. Fortunately, plate-lattice architectures exhibit great potential to satisfy such integrated mechanical performance criteria. This work introduces a new isotropic plate‑lattice topology, denoted the simple‑cubic and reinforced face‑centered-cubic (SC‑rFCC) plate lattice, and systematically investigates the mechanical properties of Ti‑6Al‑4&#xa0;V lattices with this topology using combined analytical and numerical methods. The titanium lattices exhibit competitive stiffness and strength, approaching theoretical upper bounds for isotropic porous materials, while maintaining excellent mechanical isotropy. Characterization includes directional elastic moduli, uniaxial yield strength distributions, initial failure mechanisms, and large‑deformation crushing behavior. Closed‑form Gibson–Ashby scaling laws are derived for stiffness, yield strength, and specific energy absorption over a wide range of relative densities. When evaluated using Ashby material property charts, the proposed isotropic Ti‑6Al‑4&#xa0;V SC‑rFCC plate lattice compares favorably with many conventional cellular solids and lattice materials, indicating good potential for load‑bearing applications that demand high performance‑to‑weight efficiency in advanced engineering designs.</p>

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Mechanical assessment of an isotropic Ti-6Al-4 V plate-lattice material: numerical and analytical investigations

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Liang Dong,
  • Kaihong Yu

摘要

It is still challenging to develop mechanical metamaterials featuring well-balanced elastic isotropy, high specific stiffness and high specific strength for lightweight structural engineering. Fortunately, plate-lattice architectures exhibit great potential to satisfy such integrated mechanical performance criteria. This work introduces a new isotropic plate‑lattice topology, denoted the simple‑cubic and reinforced face‑centered-cubic (SC‑rFCC) plate lattice, and systematically investigates the mechanical properties of Ti‑6Al‑4 V lattices with this topology using combined analytical and numerical methods. The titanium lattices exhibit competitive stiffness and strength, approaching theoretical upper bounds for isotropic porous materials, while maintaining excellent mechanical isotropy. Characterization includes directional elastic moduli, uniaxial yield strength distributions, initial failure mechanisms, and large‑deformation crushing behavior. Closed‑form Gibson–Ashby scaling laws are derived for stiffness, yield strength, and specific energy absorption over a wide range of relative densities. When evaluated using Ashby material property charts, the proposed isotropic Ti‑6Al‑4 V SC‑rFCC plate lattice compares favorably with many conventional cellular solids and lattice materials, indicating good potential for load‑bearing applications that demand high performance‑to‑weight efficiency in advanced engineering designs.