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Crashworthiness Analysis of Bio-Inspired Multi-Cell Concave Tubes.

Xiaolin Deng1, Jinjin Huang2, Jialiang Xie2

  • 1School of Mechanical and Resource Engineering, Wuzhou University, Wuzhou 543002, China.

Biomimetics (Basel, Switzerland)
|February 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel bio-inspired multi-cell concave tube (BMCT) that significantly enhances energy absorption and crush force efficiency under axial impact, inspired by horse tail grass.

Keywords:
bio-inspiredcrashworthinesshierarchicalmulti-cell concave tubethin-walled structures

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Area of Science:

  • Biomimetics and Materials Science
  • Mechanical Engineering and Impact Dynamics

Background:

  • Traditional energy-absorbing structures often face trade-offs between initial peak force and overall energy absorption.
  • There is a need for advanced structural designs that optimize crashworthiness for impact mitigation.

Purpose of the Study:

  • To introduce and analyze the crashworthiness of a novel bio-inspired multi-cell concave tube (BMCT).
  • To investigate the energy absorption capabilities and crush force efficiency of the BMCT under axial impact.
  • To validate simulation results through experimental and theoretical analyses.

Main Methods:

  • Biomimicry inspired by horse tail grass plants to design the BMCT structure.
  • Finite element analysis (FEA) for simulating axial impact scenarios.
  • Experimental testing and theoretical analysis to validate simulation data.

Main Results:

  • The BMCT demonstrates enhanced energy absorption capacity at equivalent mass compared to other structures.
  • BMCT achieved a 41.04% increase in crush force efficiency (CFE) with a stable initial peak crushing force (IPCF).
  • Variations in hierarchical levels of the BMCT resulted in a 21.22% increase in CFE at the same mass.

Conclusions:

  • The BMCT offers superior crashworthiness by maintaining a stable initial peak force while improving energy absorption.
  • The bio-inspired design provides a promising approach for developing advanced energy-absorbing structures.
  • The study validates the reliability of simulation methods for analyzing such complex structures.