Mechanical Properties And Anti-Icing Coatings Of Titanium Corrugated Sandwich Structure

The corrugated sandwich structure, consisting of two thin layers and light core component with high stiffness, has good design ability, light weight, high specific strength, and high load bearing property. In this thesis, the corrugated sandwich structure based on titanium alloy layer was studied. On the one hand, a series of experimental investigations and numerical analyses was conducted to investigate the impact of different wavelength on the compressive and transverse shear properties, et. al static mechanical properties; On the other hand, considering the surface of titanium alloy easy to get freezing under the low temperature and humidity environment, this thesis is intended to design different coating with special chemical component and physics structure of the surface to prevent the accretion of ice.Titanium has been machined as trapezoidal core of the corrugated sandwich structure by gear molding and then the as-prepared waved layer was brazed together to form a whole composite. The out-of-plane compressive and transverse shear properties of the corrugated cores(2.5 mm?5 mm?7.5 mm) have been measured and compared with finite element(FE) predictions. The results revealed that the mechanical behavior of the corrugated board in compression and shear load was sensitive to the variation of the core structure. The deformation load value with the variation in displacement was investigated. The out-of-plane compressive and transverse shear responses of the corrugated with three different wavelength were discussed. FE models were in good agreement with the experimental results.It has been proved that, the surface free energy and surface microstructure can pay a significantly role in anti-icing and ice-phobic. Based on the analysis in this thesis, an anti-icing coating of low surface energy surface and rough structure was synthesized. Firstly, The anti-icing film was acquired from the free radical polymerization of low surface energy properties methacryloxy propyl trimethoxyl silane/trifluoroethyl methacrylate and methyl methacrylate, butyl acrylate, styrene monomer, and the dosage of methacryloxy propyl trimethoxyl silane/trifluoroethyl methacrylate monomer respond of resin film surface hydrophobic and adhesion of titanium were discussed; Secondly, the nano-silica was activated by toluene diisocyanate before it hydrophobic modified by methacryloxy propyl trimethoxyl silane, the activation and modification mechanical was studied, and the property of the hydrophobic modified nano-silica was discussed; Finally, the anti-icing coating was prepared by dispersing the organic modification nano-silica into the organic silicon polyacrylic acid resin. An influence of the morphology of coating on hydrophobicity and the method of dosage of nano-silica(0%?2%?4%?6%?8%?10%) on the crystallization temperature of the water, the adhesion strength between the coating and ice layer was studied.