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<p>The hybrid design enables the decoupling of mechanical properties and relative density in lattice structures, while also achieving elastic isotropy. However, the mixing influence mechanisms between different lattice structures are not uniform, warranting further research. To investigate these mechanisms, plate lattice structures with varying elastic anisotropy were topologically combined with truss structures. The component ratio (<i>W</i>) of the truss structure within the hybrid lattice structure was introduced to examine its impact on the elastic mechanical properties, deformation mechanisms, and behaviors under large deformations through numerical simulations and experimental testing. The findings indicated that <i>W</i> significantly influences the elastic mechanical properties, with isotropy achieved when <i>W</i> ranged from 0.6 to 0.8. Stress distribution and force analysis revealed that the hybrid design effectively integrates the deformation behaviors of different lattice structures under varying loads. The Gibson–Ashby model fitting demonstrated that the hybrid design alters the deformation mechanisms of the lattice structures, enabling the decoupling of behaviors under uniaxial and shear deformations. Further investigations showed that, under uniaxial loading, stress distribution in the hybrid lattice structure is closely related to its structural configuration, and the macroscopic failure mode is significantly influenced by <i>W</i>. When the <i>W</i> is 0.5, the hybrid lattice structure experiences both bending and tensile deformations. At the macroscopic level, this results in failure due to collapse of the middle layer, while at the microscopic level, different deformation patterns are observed at the fracture surfaces of micro-plate and micro-rod structures. Finally, a comparative analysis demonstrated that the novel hybrid lattice structure surpassed other lattice structures in terms of mechanical performance.</p>

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Enhanced Mechanical Properties and Adjustable Anisotropy of the Novel Plate–Truss Hybrid Lattice Structure Based on Simulations and Experiments

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Junjie Lin,
  • Mingsan Xu,
  • Yanglin Tang,
  • Jianhua Ye,
  • Tieping Wei

摘要

The hybrid design enables the decoupling of mechanical properties and relative density in lattice structures, while also achieving elastic isotropy. However, the mixing influence mechanisms between different lattice structures are not uniform, warranting further research. To investigate these mechanisms, plate lattice structures with varying elastic anisotropy were topologically combined with truss structures. The component ratio (W) of the truss structure within the hybrid lattice structure was introduced to examine its impact on the elastic mechanical properties, deformation mechanisms, and behaviors under large deformations through numerical simulations and experimental testing. The findings indicated that W significantly influences the elastic mechanical properties, with isotropy achieved when W ranged from 0.6 to 0.8. Stress distribution and force analysis revealed that the hybrid design effectively integrates the deformation behaviors of different lattice structures under varying loads. The Gibson–Ashby model fitting demonstrated that the hybrid design alters the deformation mechanisms of the lattice structures, enabling the decoupling of behaviors under uniaxial and shear deformations. Further investigations showed that, under uniaxial loading, stress distribution in the hybrid lattice structure is closely related to its structural configuration, and the macroscopic failure mode is significantly influenced by W. When the W is 0.5, the hybrid lattice structure experiences both bending and tensile deformations. At the macroscopic level, this results in failure due to collapse of the middle layer, while at the microscopic level, different deformation patterns are observed at the fracture surfaces of micro-plate and micro-rod structures. Finally, a comparative analysis demonstrated that the novel hybrid lattice structure surpassed other lattice structures in terms of mechanical performance.