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<p>Informed by the stems of the bird of paradise plant and the lotus leaf plant, a series of double square bio-inspired hierarchical multicellular structures (DBHS) are proposed. Simulation studies were conducted utilizing experimentally validated models. The findings indicate that DBHSB3 demonstrates superior crashworthiness when evaluated at both equivalent wall thicknesses and equivalent mass. Specifically, for structures of the same mass, the specific energy absorption (SEA) and crush force efficiency (CFE) of DBHSB3 increased by 31.13% and 105.33%, respectively, while the initial peak crush force (IPCF) decreased by 36.14% in comparison to DBHSB0. The parametric analysis revealed that the axial gradient in wall thickness (<i>δ</i>) exerts a more pronounced influence on the crashworthiness of the structure than the transverse gradient in wall thickness (<i>k</i>). Notably, the energy absorption (EA), SEA, CFE, and IPCF of DBHSA3 increased by 105.88, 23.53, 81.54, and 13.41%, respectively, while those of DBHSB3 increased by 100.54, 20.60, 75.61, and 14.20%, respectively, when comparing <i>δ</i> = 1.5 to <i>δ</i> = 0.5.</p>

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Investigation of Energy Absorption in Double Square Bio-Inspired Hierarchical Multicellular Structures under Axial Impact

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Cuiping Huang,
  • Xiaolin Deng

摘要

Informed by the stems of the bird of paradise plant and the lotus leaf plant, a series of double square bio-inspired hierarchical multicellular structures (DBHS) are proposed. Simulation studies were conducted utilizing experimentally validated models. The findings indicate that DBHSB3 demonstrates superior crashworthiness when evaluated at both equivalent wall thicknesses and equivalent mass. Specifically, for structures of the same mass, the specific energy absorption (SEA) and crush force efficiency (CFE) of DBHSB3 increased by 31.13% and 105.33%, respectively, while the initial peak crush force (IPCF) decreased by 36.14% in comparison to DBHSB0. The parametric analysis revealed that the axial gradient in wall thickness (δ) exerts a more pronounced influence on the crashworthiness of the structure than the transverse gradient in wall thickness (k). Notably, the energy absorption (EA), SEA, CFE, and IPCF of DBHSA3 increased by 105.88, 23.53, 81.54, and 13.41%, respectively, while those of DBHSB3 increased by 100.54, 20.60, 75.61, and 14.20%, respectively, when comparing δ = 1.5 to δ = 0.5.