Effect of Shear Loading Conditions on the Measured Strength of Ice Adhesion to Superhydrophobic Surfaces

Despite the significant interest of researchers, icing of aircraft, vehicles, ships, and equipment of offshore oil structures remains to be an urgent problem. This paper considers the factors that promote a decrease in the strength of the contact between ice and surfaces under an applied shear load....

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Bibliographic Details
Published in:Colloid journal of the Russian Academy of Sciences 2024-06, Vol.86 (3), p.347-357
Main Authors: Emelyanenko, K. A., Emelyanenko, A. M., Boinovich, L. B.
Format: Article
Language:English
Subjects:
Adhesive strength
Aircraft icing
Brittle fracture
Centrifugal force
Chemistry
Chemistry and Materials Science
Coating effects
Contact stresses
Control equipment
Ductile-brittle transition
Hydrophobic surfaces
Hydrophobicity
Loading rate
Offshore structures
Polymer Sciences
Shear stress
Surfaces and Interfaces
Thin Films
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Summary:Despite the significant interest of researchers, icing of aircraft, vehicles, ships, and equipment of offshore oil structures remains to be an urgent problem. This paper considers the factors that promote a decrease in the strength of the contact between ice and surfaces under an applied shear load. The main attention is focused on studying the influence of the rate of shear loading on the fracture of the interfacial contact between ice and superhydrophobic coatings. The strength of the adhesive contact under the conditions of controlled variations in the applied load is measured using a technique based on the detachment of ice from a surface under the influence of centrifugal force. The study is carried out for large ensembles of samples in the temperature range from −5 to −20°C, thereby making it possible to evaluate the influence of the quasi-liquid layer and the Rehbinder effect on a decrease in the shear adhesive strength. The results obtained indicate that the contact between ice and a superhydrophobic coating is fractured through a mixed viscous–brittle mechanism. In this case, a decrease in temperature or an increase in the loading rate causes a transition from the viscous to the brittle fracture. These results indicate a potential acceleration of ice shedding with an increase in the growth rate of the shear stress.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X24600180