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<p>Triply periodic minimal surface (TPMS) lattice structures have attracted increasing attention for lightweight energy absorption applications. In this study, the compressive behavior and energy absorption performance of TPMS lattices are investigated through finite element simulations and quasi-static experiments. Four types of structures are considered: Gyroid lattice with gradient design (GTD), Primitive lattice with gradient design (PTD), hybrid lattice combining Gyroid and Primitive unit cells (G&amp;P), and graded-hybrid lattice combining Gyroid and Primitive unit cells with gradient design (G&amp;PTD). Energy absorption performance was evaluated using specific energy absorption (SEA), which is significantly enhanced by both hybrid and graded-hybrid designs. At a relative density of 40%, the G&amp;PTD structure achieves the highest SEA, reaching 33.25&#xa0;J/g experimentally and 33.97&#xa0;J/g numerically, with an error of 2.11%. A technique for order preference by similarity to ideal solution (TOPSIS) analysis further confirms that G&amp;PTD provides the best overall energy absorption performance. These findings indicate that integrating hybrid topology with gradient design is an effective approach for improving the energy absorption capacity of TPMS lattices.</p>

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Design and evaluation of gradient-hybrid TPMS lattices for optimized energy absorption

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Shuai Huang,
  • Jun Hu,
  • Jianwei Ren

摘要

Triply periodic minimal surface (TPMS) lattice structures have attracted increasing attention for lightweight energy absorption applications. In this study, the compressive behavior and energy absorption performance of TPMS lattices are investigated through finite element simulations and quasi-static experiments. Four types of structures are considered: Gyroid lattice with gradient design (GTD), Primitive lattice with gradient design (PTD), hybrid lattice combining Gyroid and Primitive unit cells (G&P), and graded-hybrid lattice combining Gyroid and Primitive unit cells with gradient design (G&PTD). Energy absorption performance was evaluated using specific energy absorption (SEA), which is significantly enhanced by both hybrid and graded-hybrid designs. At a relative density of 40%, the G&PTD structure achieves the highest SEA, reaching 33.25 J/g experimentally and 33.97 J/g numerically, with an error of 2.11%. A technique for order preference by similarity to ideal solution (TOPSIS) analysis further confirms that G&PTD provides the best overall energy absorption performance. These findings indicate that integrating hybrid topology with gradient design is an effective approach for improving the energy absorption capacity of TPMS lattices.