Scholarlink

<p>This study investigates the mechanical performance and energy absorption characteristics of nine lightweight lattice structures with elliptical unit cells fabricated via selective laser melting (SLM). Through quasi-static compression experiments and scanning electron microscopy (SEM) characterization, we demonstrated that graded lattice architectures outperformed uniform counterparts at equivalent volume fractions, exhibiting 9–21% higher energy absorption capacity with a peak value of 115.4&#xa0;J/cm<sup>3</sup>. Notably, the mechanical properties exhibited a linear scaling relationship with volume fraction, while the 45%-graded configuration achieved optimal energy dissipation through a two-stage deformation mechanism: initial layer-by-layer buckling in graded zones followed by progressive densification. Digital image correlation analysis further revealed that catastrophic shear failure mode observed in uniform structures was effectively mitigated by gradient design. These findings highlight the critical role of architectural grading in developing energy-absorbing metamaterials for crash safety applications, particularly in aerospace and automotive systems demanding concurrent high specific strength and programmable energy management capabilities.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanical property and energy absorption performance of 316L graded lattice structures fabricated by selective laser melting

  • 期刊论文

  • 发表日期：

    2026年3月16日

查看全文
  • Lixia Wang,
  • Xu Niu,
  • Yuan Li,
  • Qihang Zeng,
  • Xiangyu Ma,
  • Shuang Liang,
  • Qinghui Zeng,
  • Xiao Li,
  • Runjian Shi

摘要

This study investigates the mechanical performance and energy absorption characteristics of nine lightweight lattice structures with elliptical unit cells fabricated via selective laser melting (SLM). Through quasi-static compression experiments and scanning electron microscopy (SEM) characterization, we demonstrated that graded lattice architectures outperformed uniform counterparts at equivalent volume fractions, exhibiting 9–21% higher energy absorption capacity with a peak value of 115.4 J/cm3. Notably, the mechanical properties exhibited a linear scaling relationship with volume fraction, while the 45%-graded configuration achieved optimal energy dissipation through a two-stage deformation mechanism: initial layer-by-layer buckling in graded zones followed by progressive densification. Digital image correlation analysis further revealed that catastrophic shear failure mode observed in uniform structures was effectively mitigated by gradient design. These findings highlight the critical role of architectural grading in developing energy-absorbing metamaterials for crash safety applications, particularly in aerospace and automotive systems demanding concurrent high specific strength and programmable energy management capabilities.