CREEP OF FLOATING ICE SHEET.

• Main Author: Garbaccio,Donald H.
• Other Authors: SCIENCE ENGINEERING ASSOCIATES INC SAN MARINO CALIF
• Format: Text
• Language: English
• Published: 1967
• Subjects: Snow; Ice and Permafrost; (*SEA ICE; CREEP); LOADS(FORCES); ELASTIC PROPERTIES; VISCOELASTICITY; NUMERICAL ANALYSIS; MECHANICAL PROPERTIES; Laplace; Ice; Ice Sheet; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/AD0654742; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0654742

Theory was developed for a finite length line load on an elastic plate on elastic foundation. When the solution for a finite thickness plate failed to give convergent expressions for the bending moments under the load, the solution was reduced to the case of a thin plate for which a convergent solution was obtained. The correspondence principle was applied to obtain the linear viscoelastic problem. An approximate method of Laplace transform inversion was used to obtain the time dependent behavior of the creeping plate. Numerical results are presented. Theory was developed using the Hankel and Laplace transforms for a plate of finite thickness with circular symmetrical loading which was later reduced to a uniform load over a circular area. The solution is presented in a form where numerical calculations can easily be made with a digital computer. Owing to the complexity of the problem the nonlinear creep behavior of floating ice sheets was limited to a thin plate with circular symmmetry deforming with a power creep law. No numerical results were obtained but a suggested method of solution is outlined. (Author)