Author(s): R. F. Mckenna; I. J. Jordaan; J. Xiao
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Keywords: No Keywords
Abstract: The damage process is an important aspect of ice crushing and influences the loads exerted on ships and structures. Recent field experiments using a spherical indenter and laboratory indentation experiments on freshwater ice have prompted the development of the present finite element model. Where ice crushing occurs, there is increasing evidence that much of the ice load is transmitted in small regions of high pressure. The present work addresses the confined ice zone immediately adjacent to the structure. A three-dimensional continuum model was developed to address the influence of microcracking on the elastic and creep properties of the ice, and to account for the volume increase resulting from the microcracks. This model has been implemented using finite elements and applied to ice loading situations. On impact, damage is concentrated at the contact face as energy flows into the area. This is illustrated graphically by observing changes in the flow of mechanical energy as damage progresse
Year: 1990