Author(s): David M. Cole; John P. Dempsey; Guro Kjestveit; Saul Shapiro; Lewis H. Shapiro; Geoffrey M. Morley Sm
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Keywords: No Keywords
Abstract: The breakup process plays an important role in ice dynamics and thermodynamics. A current research program is studying the mechanical properties of the annual ice in Antarctica in an effort to develop improved, physically based models of the breakup process. Two field trips have been conducted in McMurdo Sound in support of this effort and the present paper describes the work and presents selected results. The in situ experiments investigated the constitutive and fracture behavior of edgenotched, square plate specimens of first-year ice, and involved a detailed characterization of the physical properties and thermal state of the ice. The paper describes the physical properties and microstructure of the sheet, the cyclic loading response and the acoustic emissions activity from one of the in situ specimens. Practical aspects of the experiments are considered, and the results are put into context with the overall modeling goals of the project.
Year: 2002