Crack coalescence in granite
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2008.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2009
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| Online Access: | http://hdl.handle.net/1721.1/47771 |
| _version_ | 1826202056397946880 |
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| author | Miller, James Thomas, Ph. D. Massachusetts Institute of Technology |
| author2 | Herbert H. Einstein. |
| author_facet | Herbert H. Einstein. Miller, James Thomas, Ph. D. Massachusetts Institute of Technology |
| author_sort | Miller, James Thomas, Ph. D. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2008. |
| first_indexed | 2024-09-23T12:01:28Z |
| format | Thesis |
| id | mit-1721.1/47771 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T12:01:28Z |
| publishDate | 2009 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/477712019-04-12T13:52:02Z Crack coalescence in granite Miller, James Thomas, Ph. D. Massachusetts Institute of Technology Herbert H. Einstein. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Civil and Environmental Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2008. Includes bibliographical references. This thesis experimentally investigates crack coalescence in prismatic Barre Granite specimens with two pre-cut, open flaws under uniaxial compression. Using a high-speed video system, crack initiation, propagation, and coalescence are observed. Flaw geometries are chosen to allow one to compare the results with those of studies in other materials as well as to better understand fracturing and coalescence processes. Specifically, the effect of ligament length (L), flaw inclination angle (p3), and bridging angle (a) on coalescence is investigated. The same crack types as in other materials are observed. Coalescence patterns observed fit into a previously developed framework (for molded gypsum and Carrara marble) with the exception of one new coalescence pattern. Crack processes and coalescence patterns suggest a more tensile behavior as grain size increases from gypsum to marble to granite. Similar to previous work in marble and granite, white patches are observed during compression tests. These white patches can be categorized as either diffuse or linear, with linear white patches further subdivided into two more types, namely boundary-following and through-going. The white patches are essentially process zones. The effect of water pressure on coalescence pattern is also investigated. Flaw water pressure is seen to affect coalescence in granite, although further work is needed. by James Thomas Miller. S.M. 2009-10-01T15:40:58Z 2009-10-01T15:40:58Z 2008 2008 Thesis http://hdl.handle.net/1721.1/47771 428976146 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 474 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Civil and Environmental Engineering. Miller, James Thomas, Ph. D. Massachusetts Institute of Technology Crack coalescence in granite |
| title | Crack coalescence in granite |
| title_full | Crack coalescence in granite |
| title_fullStr | Crack coalescence in granite |
| title_full_unstemmed | Crack coalescence in granite |
| title_short | Crack coalescence in granite |
| title_sort | crack coalescence in granite |
| topic | Civil and Environmental Engineering. |
| url | http://hdl.handle.net/1721.1/47771 |
| work_keys_str_mv | AT millerjamesthomasphdmassachusettsinstituteoftechnology crackcoalescenceingranite |