Browse Publications Technical Papers 2019-01-1948

Numerical and Experimental Investigation of Ice Adhesion using the Blister Test 2019-01-1948

Structures in cold weather environments are susceptible to atmospheric ice formation. A fracture mechanics based approach is proposed for in situ characterization of the interfacial fracture energy of ice on different substrates. This paper summarizes the development of the experimental and analytical framework to measure the ice adhesion energy. The testing configuration utilizes a shaft-loaded blister test to produce stable crack propagation, from a well-defined pre-crack at the interface of the ice layer and the substrate. Measurements of the fracture energy are taken over a range of ice thicknesses and surface roughnesses. The developed analytical framework to estimate the ice deformation configuration and the adhesion energy are verified and calibrated via finite element numerical simulation of the proposed geometric configuration and employing cohesive surfaces along the interface to simulate the crack nucleation and propagation process. Several different phenome were observed include the transition from adhesive to cohesive fracture and the formation of serrated fracture surface. The proposed experimental framework enables precise measurement of the interfacial fracture toughness over a range of surface finishes and ice layer thickness.


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