Author(s): W. D. Hibler; E. M. Schulson
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Keywords: No Keywords
Abstract: The failure of sea-ice under deformation on scales both small and large is characterized by the development of oriented leads and cracks. A conceptual notion especially relevant to the geophysical scale is that these leads and flaws develop from the interaction and propagation of existing oriented leads and flaws. A theory for the dynamical treatment of anisotropic oriented flaws in sea ice has been developed by Hibler and Schulson (1998) based on taking laboratory constitutive laws for both thin and thick ice. This model predicts certain preferred orientations for failing flaws. To examine fracture propagation characteristics of this model we here consider a simpler constitutive law for the flaw and thick ice and examine the deformation and stress characteristics of imbedded flaws and the surrounding ice under both near and far field stress forcing in order to determine how fracture and subsequent lead formation occur in this anisotropic model.
Year: 1998