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<p>This research presents a new design method for lightweight, energy-absorbing, hybrid lattice structures of triply periodic minimal surfaces. Traditional diamond (D) and gyroid (G) lattices are hybridized with varying weights to create a novel structure that combines their advantages. An Al-Cu-Mg-Y alloy fabricated via laser powder bed fusion with ultrahigh compressive ductility is used to prepare the lattices. Results show that the D6G4 lattice (60&#xa0;wt.% D + 40&#xa0;wt.% G) exhibits a broader load-bearing region and an interlaced grid arrangement aligned with the maximum shear stress direction at 45°. This configuration effectively disperses shear stress into other directions, thereby improving the ultimate compressive strength and plateau stress. Consequently, the D6G4 lattice demonstrates superior energy absorption performance.</p>

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Energy Absorption Studies on LPBF Fabricated Hybrid-Dimensional TPMS Lattice Structure

  • 期刊论文

  • 发表日期：

    2026年4月3日

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  • Zeyuan Li,
  • Chuangwei Xiao,
  • Jiamin Wu,
  • Shang Zhu,
  • Ying Chen,
  • Shengfu Yu,
  • Yusheng Shi

摘要

This research presents a new design method for lightweight, energy-absorbing, hybrid lattice structures of triply periodic minimal surfaces. Traditional diamond (D) and gyroid (G) lattices are hybridized with varying weights to create a novel structure that combines their advantages. An Al-Cu-Mg-Y alloy fabricated via laser powder bed fusion with ultrahigh compressive ductility is used to prepare the lattices. Results show that the D6G4 lattice (60 wt.% D + 40 wt.% G) exhibits a broader load-bearing region and an interlaced grid arrangement aligned with the maximum shear stress direction at 45°. This configuration effectively disperses shear stress into other directions, thereby improving the ultimate compressive strength and plateau stress. Consequently, the D6G4 lattice demonstrates superior energy absorption performance.