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Abstract <p>With the continuous advancement of additive manufacturing (AM) technology, Lattice structures have become a research hotspot due to their excellent lightweight characteristics and multifunctionality. In this study, topology optimization and selective laser sintering (SLS) technology are innovatively combined to design eight novel lightweight lattice structures (FCL, VL, EML, FQL, VFCL, VFQL, EFCL, and EFQL) by eight complex boundary load conditions, which breaks through the dependence of the traditional combinatorial method on geometrical intersection points. Meanwhile, the typical BCC structure is introduced as a reference. Quasi-static compression experiments were carried out on the prepared topological lattice structures in order to deeply investigate their mechanical properties and energy absorption. The results show that the mechanical properties of VL and VFQL structures are better than the other topological lattice structures, and the FCL and VFQL structures have the most energy absorption per unit volume. The EFCL structure has similar mechanical properties as the VL structure, but the EFCL structure is more stable than the VL structure. All topology-optimized structures show better mechanical properties and energy absorption than BCC structures, which fully demonstrates the feasibility of choosing topology-optimized designed lattice structural units. This study provides theoretical basis and practical guidance for the design and fabrication of high-performance polymer lattice structures.</p>

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Study on Mechanical Properties and Energy Absorption of PA12 Topological Lattice Structures Prepared by Selective Laser Sintering

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • B. Hao,
  • Z. J. Yan,
  • G. N. Li,
  • Y. Han

摘要

Abstract

With the continuous advancement of additive manufacturing (AM) technology, Lattice structures have become a research hotspot due to their excellent lightweight characteristics and multifunctionality. In this study, topology optimization and selective laser sintering (SLS) technology are innovatively combined to design eight novel lightweight lattice structures (FCL, VL, EML, FQL, VFCL, VFQL, EFCL, and EFQL) by eight complex boundary load conditions, which breaks through the dependence of the traditional combinatorial method on geometrical intersection points. Meanwhile, the typical BCC structure is introduced as a reference. Quasi-static compression experiments were carried out on the prepared topological lattice structures in order to deeply investigate their mechanical properties and energy absorption. The results show that the mechanical properties of VL and VFQL structures are better than the other topological lattice structures, and the FCL and VFQL structures have the most energy absorption per unit volume. The EFCL structure has similar mechanical properties as the VL structure, but the EFCL structure is more stable than the VL structure. All topology-optimized structures show better mechanical properties and energy absorption than BCC structures, which fully demonstrates the feasibility of choosing topology-optimized designed lattice structural units. This study provides theoretical basis and practical guidance for the design and fabrication of high-performance polymer lattice structures.