Research On Theories And Experiments Of Mechanical Properties Of Impact Ice

Aircraft icing problem caused by flying in super-cooled cloud layer has aroused people’s attentionnowadays. Mechanical de-icing technology, as a kind of effective method of de-icing system, is beingmore and more applied. Mechanical de-icing relies mainly on the vibration or deformation of fuselageskin to damage the structure of ice or its adhesion to fuselage skin. In this process, the ice destructionmode can be divided into normal tensile fracture, tangential shear failure and the adhesion strengthdestruction. So when mechanical de-icing system is at work, it must provide loads which are greaterthan the ice strength and ice adhesive strength. The adhesion mechanism and fracture process of icehas been studied and the data distribution of shear adhesive strength of ice has been obtained throughexperimental research in this paper, which can provide technical support for the design andperformance verification of mechanical de-icing system.In this study, the following several aspects has been researched:1) the original reason of theadhesion mechanism of ice, and the analysis and modeling of ice failure process under external loadbased on fracture mechanics;2) construction of the impact ice test bench and measurement of iceshear adhesion strength with its substrate material while changing experimental parameters such asicing condition, base material and its surface roughness and external loading rate;3) analysis of theexperimental data, have the distribution of ice forms and its shear adhesive strength with variousexperimental parameters concluded, analyze the stress distribution in ice during experiments throughnumerical simulation and have the experimental results compared with foreign research.Through data processing and analysis, the experimental results have been proven to be successfullymatched with ice adhesion and fracture mechanism principles. Accordingly, this test bench can haveimpact ice accumulated successfully and have mechanical experiments accomplished as beingdesigned to. Research in this paper can be meaningful for the design of aircraft de-icing system.