Experimental Investigation Of Compressive Failure Of Truncated Conical Ice Specimens PDF Download
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Author | : Kashfi Binte Habib |
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Total Pages | : |
Release | : 2014 |
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Download Experimental Investigation of Compressive Failure of Truncated Conical Ice Specimens Book in PDF, ePub and Kindle
In total, twenty-eight (28) small-scale ice indentation tests have been carried out to study the compressive failure of polycrystalline ice during indentation and to explore the link between various parameters that influence the ice failure processes, using ice specimens having a truncated conical geometry. Taper angle, temperature, indentation rate, indenter shape and grain size are considered as controlled variables in this research program. For the experiments, three geometric configurations (with taper angles of 13°, 21°, 30°) have been used, conducted at temperatures of -10°C and -5°C. Indentation rates of 0.1 mm/s, 1 mm/s and 10 mm/s have been considered using two indenter shapes (a flat plate and a spherical indenter). Two grain size ranges were considered for these tests. The total force and pressure were found to show dependencies on the indentation rate. The force becomes higher and failure process changes from brittle to ductile as indentation rate decreases. For example, in case of the 21o taper angle ice sample, maximum ice loads were 20 kN and 145 kN and peak pressures were 8 MPa and 18 MPa for indentation speeds of 10 mm/s and 0.1 mm/s respectively. The total force also depends on the taper angle of ice sample. The loads increase as the ice samples become flatter. So, the 13° ice sample was stronger than the 30° ice sample. Different shaped indenters also observed to have distinct experimental outputs. Tests that were done using the spherical indenter show lower forces than the tests that were done using the flat indenter. Effects of temperature reveal that the warm tests show a greater tendency to ductile failure than cold tests having same parameters. The ice samples with smaller ice seeds need more force to fail compared to ice samples with bigger ice seeds. To observe the microstructural modification, horizontal and vertical thin-sections of the damaged ice adjacent to the indenter have been examined. Ice particles were collected from the testing area following each experiment to observe the influence of different factors on the particle size distributions. The effect of each variable on observed failure processes and associated loads are presented in the thesis.
Author | : Katy Taylor |
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Total Pages | : 174 |
Release | : 2005 |
Genre | : Faults (Geology) |
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Author | : Dana Burks |
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Total Pages | : 534 |
Release | : 1933 |
Genre | : Alcohol |
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Total Pages | : 512 |
Release | : 1968 |
Genre | : Chemistry |
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Download Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States Book in PDF, ePub and Kindle
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Total Pages | : 248 |
Release | : 1972 |
Genre | : Aeronautics |
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Total Pages | : 164 |
Release | : 1968 |
Genre | : Dissertations, Academic |
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Download Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences Book in PDF, ePub and Kindle
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Total Pages | : 410 |
Release | : 1994 |
Genre | : Cold regions |
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Download Bibliography on Cold Regions Science and Technology Book in PDF, ePub and Kindle
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Total Pages | : 338 |
Release | : 1987 |
Genre | : Mechanics, Applied |
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Author | : Samuel K. Clark |
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Total Pages | : 942 |
Release | : 1981 |
Genre | : Friction |
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Author | : Franz Roters |
Publisher | : John Wiley & Sons |
Total Pages | : 188 |
Release | : 2011-08-04 |
Genre | : Technology & Engineering |
ISBN | : 3527642099 |
Download Crystal Plasticity Finite Element Methods Book in PDF, ePub and Kindle
Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.