YU Di,WANG Zhaoyang,LIU Yansong,et al. Study on energy absorption characteristics of biomimetic fractal sandwich plate core structure[J]. Journal of Mechanical Strength,2025,47(10):124-130.
YU Di,WANG Zhaoyang,LIU Yansong,et al. Study on energy absorption characteristics of biomimetic fractal sandwich plate core structure[J]. Journal of Mechanical Strength,2025,47(10):124-130. DOI: DOI:10.16579/j.issn.1001.9669.2025.10.014.
Study on energy absorption characteristics of biomimetic fractal sandwich plate core structure
To enhance the energy absorption efficiency of conventional sandwich panels
a biomimetic tree-like fractal core (BTLFC) inspired by the dendritic fractal structure of the royal lotus leaf vein was designed. Firstly
quasi-static compression tests revealed th
at the 2-order BTLFC exhibited a specific energy absorption 5.69% higher and an average load 4.46% greater than traditional honeycomb cores. Secondly
a finite element numerical model of the BTLFC was established; combined with quasi-static compression test data
the finite element model error was within 2.2%
demonstrating high accuracy of the model. Finally
Latin hypercube test design
Kriging surrogate model
and the non-dominated sorting genetic algorithm-II (NSGA-II) were employed to perform multi-objective optimization on the structural parameter combinations of the BTLFC (size ratio
r
bifurcation angle
θ
fractal order
D
). The optimized BTLFC structure exhibited superior comprehensive performance
with specific energy absorption increased by 10.19%
peak crushing force reduced by 12.27%
and mass decreased by 11.79% compared to traditional honeycomb cores. The findings provide novel biomimetic design insights for developing high-performance energy absorption structures.
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references
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