Author(s): J. Weiss; N. Hotellier; M. Gay
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Keywords: No Keywords
Abstract: Two different aspects of the coupling between viscoplastic deformation and damage have been investigated within the ductile/brittle transition in ice under compression. First, it was shown that fracturing enhanced creep deformation of damaged ice in two ways: by cataclastic flow, as well as by an increase of dislocation creep. This last effect prevails at the early stages of fracturing, whereas cataclastic flow prevails as approaching failure. Then, we showed that viscoplastic pre-straining of ice modified the spatial organisation of the early stages of damage and delayed the entire fracturing process.
Year: 1998