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<p>The triply periodic minimal surface (TPMS) structure has become a research topicality for lightweight multifunctional materials due to its unique mechanical properties and thermal conductivity characteristics. In this study, an optimization strategy based on multi-physical fields to design multilayer Gyroid lattice structures is proposed. Three types of specimens were prepared using the selective laser melting technique: multilayer hierarchical structures optimized based on the stress field, multilayer hierarchical structures optimized based on the temperature field, and six sets of primary Gyroid structures with corresponding volume fractions as a control group. Through systematic uniaxial compression experiments and constant temperature heating tests, it was found that the ultimate compressive strength, modulus of elasticity, and yield strength of the stress field-optimized structures were significantly increased by 57.94, 63.36, and 109.48%, respectively, for similar volume fractions; at the same time, the temperature field-optimized structures achieved a 20.37% increase in the temperature difference compared to the conventional structures, and the thermal insulation performance was significantly improved. This study provides an important theoretical basis and practical guidance for the development of new TPMS materials with excellent mechanical properties and thermal insulation characteristics.</p>

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Mechanical and Thermal Properties of Multilayer Gyroid Lattice Structures Driven by Multiple Physical Fields

  • 期刊论文

  • 发表日期：

    2025年10月22日

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  • Jing Fu,
  • Mingkai Tang,
  • Mingzhi Yao

摘要

The triply periodic minimal surface (TPMS) structure has become a research topicality for lightweight multifunctional materials due to its unique mechanical properties and thermal conductivity characteristics. In this study, an optimization strategy based on multi-physical fields to design multilayer Gyroid lattice structures is proposed. Three types of specimens were prepared using the selective laser melting technique: multilayer hierarchical structures optimized based on the stress field, multilayer hierarchical structures optimized based on the temperature field, and six sets of primary Gyroid structures with corresponding volume fractions as a control group. Through systematic uniaxial compression experiments and constant temperature heating tests, it was found that the ultimate compressive strength, modulus of elasticity, and yield strength of the stress field-optimized structures were significantly increased by 57.94, 63.36, and 109.48%, respectively, for similar volume fractions; at the same time, the temperature field-optimized structures achieved a 20.37% increase in the temperature difference compared to the conventional structures, and the thermal insulation performance was significantly improved. This study provides an important theoretical basis and practical guidance for the development of new TPMS materials with excellent mechanical properties and thermal insulation characteristics.