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<p>Conventional simple-cubic (SC) lattice structures possess favorable load-bearing capacity but suffer from stress concentration and deformation instability under compression, which limits their energy absorption capacity. SC closed tubular lattices have gained attention for their low anisotropy and relatively stable yet irregular post-yield response, though their deformation controllability and energy absorption capacity remain limited. To address these limitations, this study introduces a corrugation-based geometric design, incorporating circumferential, longitudinal, and orthogonal corrugations into SC closed tubular lattices. The corrugated geometry enables multi-directional load transfer and controlled deformation, converting disordered collapse into ordered, progressive compaction. Structures are fabricated via high-precision additive manufacturing and tested under quasi-static uniaxial compression. Results show that corrugations significantly improve stiffness, stability, and energy absorption. The circumferentially corrugated lattice achieves 100% higher energy absorption, while the longitudinal corrugated lattice shows the highest energy absorption efficiency of 51.5%, and the orthogonal structure delivers a well-balanced performance. Compared to traditional thin-walled or surface-corrugated lattices, the proposed closed tubular design enhances deformation controllability. This work presents a geometric design strategy to improve deformation regularity and energy absorption in SC-based lattices, offering valuable insights for developing high-performance energy-absorbing structures.</p>

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Corrugation-Based Design Enables Deformation Mode Control and Energy Absorption Enhancement in Simple-Cubic Closed Tubular Lattices

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Guo Fu,
  • Jiahao Wen,
  • Di Ou,
  • Yuhang Li,
  • Nengwen Yang,
  • Andi Lai

摘要

Conventional simple-cubic (SC) lattice structures possess favorable load-bearing capacity but suffer from stress concentration and deformation instability under compression, which limits their energy absorption capacity. SC closed tubular lattices have gained attention for their low anisotropy and relatively stable yet irregular post-yield response, though their deformation controllability and energy absorption capacity remain limited. To address these limitations, this study introduces a corrugation-based geometric design, incorporating circumferential, longitudinal, and orthogonal corrugations into SC closed tubular lattices. The corrugated geometry enables multi-directional load transfer and controlled deformation, converting disordered collapse into ordered, progressive compaction. Structures are fabricated via high-precision additive manufacturing and tested under quasi-static uniaxial compression. Results show that corrugations significantly improve stiffness, stability, and energy absorption. The circumferentially corrugated lattice achieves 100% higher energy absorption, while the longitudinal corrugated lattice shows the highest energy absorption efficiency of 51.5%, and the orthogonal structure delivers a well-balanced performance. Compared to traditional thin-walled or surface-corrugated lattices, the proposed closed tubular design enhances deformation controllability. This work presents a geometric design strategy to improve deformation regularity and energy absorption in SC-based lattices, offering valuable insights for developing high-performance energy-absorbing structures.