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A Self-Healing Structure Based on Monolayer Wall-Less Microvascular Network Carriers for Orthotropic Anisotropic

Shenbiao Wang1, Peng Li1, Baijia Fan1

  • 1School of Mechatronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013, China.

Polymers
|April 28, 2025
PubMed
Summary

This study optimized microvascular networks in glass-fiber composites for self-healing. Light-activated repair significantly enhanced structural integrity and load-bearing capacity after damage.

Keywords:
light energy damage self-healingnon-dominated sorting genetic algorithm II (NSGA-II)orthotropic anisotropic polymer compositesself-healing structurewall-less microvascular network

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Composite Materials

Background:

  • Anisotropic composite laminates are prone to internal damage cracks due to their structure and properties.
  • Self-healing materials offer a promising solution to mitigate damage in structural components.

Purpose of the Study:

  • To design and fabricate a self-healing composite material with an optimized microvascular network.
  • To investigate the effectiveness of light-activated repair on the mechanical performance of damaged composites.

Main Methods:

  • Topology optimization using non-dominated sorting genetic algorithm II (NSGA-II) to design the microvascular network.
  • Fabrication of wall-less microvascular networks using vacuum-assisted resin transfer molding and embedded wire removal.
  • Mechanical testing via three-point bending tests to evaluate repair performance.

Main Results:

  • The embedded microvascular network recovered 94.06% of the original maximum failure load without light repair.
  • Real-time light repair increased the average maximum failure load by 4.1% compared to non-light-repaired structures.
  • Light-repaired structures showed a 28.56% higher second peak load than non-light-repaired structures.

Conclusions:

  • Optimized microvascular networks enhance the self-healing capability of glass-fiber-reinforced polymer composites.
  • Light-activated repair is an effective method to further improve the mechanical performance and load-bearing capacity of damaged self-healing composites.