Author(s): Rene Tinawi; Luc Gagnon
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Keywords: No Keywords
Abstract: The behaviour of sea ice circular plates tested in the laboratory under a sustained load is examined at temperatures varying between -5°C and -30°C. S2 type sea ice characterizes the material. Creep deflections based on flexural thin plate theory assuming isotropy and homogeneity yield results that are very different from the observed tests. Shear deformations due to transverse anisotropy must be considered in order to have closer correlation between theory and experiments. Based on these tests, a reduction in the transverse shear modulus with time is suggested for evaluation of the long term deflections of sea ice under a sustained load. This implies that a shear model, rather than a flexural model, is better suited for long term predictions. Verification with field test is yet to be performed.
Year: 1984