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<p>Ice accumulation on aircraft surfaces can distort their aerodynamic profile, leading to diminished lift, increased drag, impaired&#xa0;maneuverability, and an elevated risk of stalling. Currently, the most promising approach&#xa0;for de-icing involves designing surface structures and chemical compositions that minimize ice adhesion. Anti-icing coatings with low ice adhesion strength are typically&#xa0;fabricated&#xa0;from soft materials, but this often results in insufficient durability. To strike a balance between low ice adhesion strength and durability, this study introduces&#xa0;an inhomogeneous elastic modulus coating, developed&#xa0;through finite element simulation. The shear strength at the ice-substrate interface is the most commonly&#xa0;employed&#xa0;metric for describing ice adhesion strength. An ice shedding model for measuring ice adhesion shear strength was established based on the bilinear cohesive zone model and cohesive element&#xa0;method. Utilizing the finite element model, we analyzed the impact of variations in elastic modulus inhomogeneity, size, shape, and spatial distribution on the coating’s ice adhesion strength. It was found that stress concentration induced&#xa0;by elastic modulus inhomogeneity facilitates&#xa0;crack initiation and propagation along the ice-substrate interface, thereby reducing ice adhesion shear strength. Compared to traditional polydimethylsiloxane coatings with low ice adhesion strength, the engineered anti-icing coating demonstrates a roughly 25% reduction in ice adhesion strength, coupled with a 26-fold increase in durability. This study lays a theoretical foundation for the future development of new anti-icing coatings that combine low ice adhesion strength with enhanced durability.</p>

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Design and preparation of coating with low ice adhesion strength based on interface elastic modulus inhomogeneity

  • 期刊论文

  • 发表日期：

    2025年10月21日

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  • Jiacheng Liu,
  • Xiaobin Huang,
  • Xiangzhao Wang,
  • Zemin Ji,
  • Wenbin Hu

摘要

Ice accumulation on aircraft surfaces can distort their aerodynamic profile, leading to diminished lift, increased drag, impaired maneuverability, and an elevated risk of stalling. Currently, the most promising approach for de-icing involves designing surface structures and chemical compositions that minimize ice adhesion. Anti-icing coatings with low ice adhesion strength are typically fabricated from soft materials, but this often results in insufficient durability. To strike a balance between low ice adhesion strength and durability, this study introduces an inhomogeneous elastic modulus coating, developed through finite element simulation. The shear strength at the ice-substrate interface is the most commonly employed metric for describing ice adhesion strength. An ice shedding model for measuring ice adhesion shear strength was established based on the bilinear cohesive zone model and cohesive element method. Utilizing the finite element model, we analyzed the impact of variations in elastic modulus inhomogeneity, size, shape, and spatial distribution on the coating’s ice adhesion strength. It was found that stress concentration induced by elastic modulus inhomogeneity facilitates crack initiation and propagation along the ice-substrate interface, thereby reducing ice adhesion shear strength. Compared to traditional polydimethylsiloxane coatings with low ice adhesion strength, the engineered anti-icing coating demonstrates a roughly 25% reduction in ice adhesion strength, coupled with a 26-fold increase in durability. This study lays a theoretical foundation for the future development of new anti-icing coatings that combine low ice adhesion strength with enhanced durability.