Modelling ice island calving events with Finite Element Analysis

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Supplemental Files: 

Creator: 

Smith, Jesse

Date: 

2020

Abstract: 

Ice islands, massive tabular icebergs, are known to fracture (calve) into fragments as they drift. One proposed calving mechanism occurs when a large protuberance, known as a ram, develops along the submerged edge of the ice island and induces a bending stress due to its buoyancy. To examine the relationship between rams and ice island fracture, polygons of ice islands derived from remote sensing imagery were used to create 3-D representations with synthesized rams. Associated stress and fractures were predicted using a Finite Element Analysis (FEA) and the results were compared to polygons of the actual fractured pieces. Modelled ice islands calve accurately when a synthesized ram is placed only along the edge that breaks off. An empirical model was developed to predict stress magnitude, which indicated the length of the ram, ram extent, and the ratio of ram volume to total ice volume play a central role in calving.

Subject: 

Physical Geography
Environmental Sciences
Materials Science

Language: 

English

Publisher: 

Carleton University

Note: 

testing notes field

Thesis Degree Name: 

Master of Science: 
M.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Geography

Parent Collection: 

Theses and Dissertations

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