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Download IUTAM Symposium on Scaling Laws in Ice Mechanics and Ice by Ronald Greeley (auth.), J. P. Dempsey, H. H. Shen (eds.) PDF

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By Ronald Greeley (auth.), J. P. Dempsey, H. H. Shen (eds.)

This quantity constitutes the lawsuits of the IUTAM Symposium on 'Scaling legislation in Ice Mechanics and Ice Dynamics', held in Fairbanks, Alaska from thirteenth to sixteenth of June 2000. Ice mechanics offers with basically intact ice: during this self-discipline, descriptions of the movement and deformation of Arctic/ Antarctic and river/lake ice demand the improvement of bodily dependent constitutive and fracture versions over an important variety in scale: 0.01 m - 10 km. Ice dynamics, nonetheless, offers with the move of damaged ice: descriptions of an mixture of ice floes demand actual modeling of momentum move in the course of the sea/ice process, back over an immense diversity in scale: 1 km (floe scale) - 500 km (basin scale). For ice mechanics, the emphasis on lab-scale (0.01 - 1/2 m) examine con­ trasts with purposes on the scale of order 1 km (ice-structure interplay, icebreaking); many very important upscaling questions stay to be explored.

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Extra resources for IUTAM Symposium on Scaling Laws in Ice Mechanics and Ice Dynamics: Proceedings of the IUTAM Symposium held in Fairbanks, Alaska, U.S.A., 13–16 June 2000

Example text

Kry (1978) analysed the indentation of ice sheets, particularly with MNJORDAANANDJOHNPOND 48 a view to the design of ice islands in the Beaufort Sea. The independent zones corresponded to flakes or spalls observed in the field; smaller scale field tests were also conducted. The focus was therefore on relatively slowly moving ice. Under these conditions, quite large spalls take place, and the final estimate of the independent zones was of the order of 7m. Kry used lognormal distributions to describe the stresses in the individual zones, and then averaged these over several zones, on the assumption of independence between zones.

Again a "jump" in the pressure/area curve occurs. 15 times less than the value of a fully LOCAL ICE PRESSURE AREA CURVES 23 confined area for the same area. The design values for our examples are given in Table 4. Table 4. 3 64 This process continues until the full pressure/area or load per width curves are determined for the entire full width of the structure. The results of this exercise for the SSDC/MAT are presented in Figure 10 and Figure 11. Figure 10 also includes local ice pressures derived for a wide structure located in the Chuckchi Sea in 30 m of water.

Shkhinek, K. , 1999. An Overview of the Influence of Structure Width and Ice Thickness on the Global Ice Load. Proceedings 15th Inti. Conf on Port and Ocean Engineering under Arctic Conditions, Espoo, Finland, August 1999, Jukka Tuhkuri and Kaj Riska, Editors. Masterson, D. M. and Frederking, R. M. , 1993. Local Contact Pressures in Ship/Ice and Structure/Ice Interactions. Cold Regions Science and Technology 21, 169-185 Sandwell Inc. , 1994. Processing of Pack Ice Stress Data. Report to National Research Council, Ottawa, Canada.

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