On Fracture of Warm Ice
The effect of grain boundary softening on the fracture toughness of warm freshwater ice is analyzed based on micromechanical considerations. This approach allows one to relate statistical and size effects to microstructural properties, and identify simple scaling rules for the fracture toughness. Those rules suggest that the test data for lake ice reported by Dempsey et al. (1999a) may not be prone to size effects, other than those dictated by linear elastic fracture mechanics.
KeywordsFracture Toughness Process Zone Linear Elastic Fracture Mechanic Periodic Array Fracture Toughness Test
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