{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/105248"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/105248","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Novel techniques for fracture monitoring in crystalline rock","abstract":"The study of fracture is necessary in geotechnical engineering for the safe design of structures and application of engineering principles. Fracture plays a significant role in the behavior of rock and structures during failure. Often times, fracture processes observed in the laboratory do not accurately represent what occurs in the field due to the effect that specimen size and loading conditions have on fracture properties, namely, fracture toughness and the size of the fracture process zone. The fracture toughness increases with specimen size until it reaches a limiting value when the material is large enough to exhibit brittle behavior. In a similar manner, the size of the fracture process zone is observed to grow with specimen size until a limiting value is reached for a large enough specimen. In this study, experiments were performed on granitic specimens of different sizes and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to the extremely small displacements, in the order of microns, that are associated with fracture in granite. The results from experiments performed on Adelaide Black granite under three-point bending are compared to data obtained using acoustic emission on the same rock and were shown to be in good agreement. It was observed that in Charcoal granite specimens of sizes that that are typically used in the laboratory, the fracture process zone is larger under four-point bending compared to three-point bending conditions. However, it is predicted that for a large enough specimen, the dimensions of the fracture process zone are similar for both loading conditions. In addition, in the appendix, the use of ultrasonic measurements to study and determine the geometry of a propagating hydraulic fracture in granite is described.","abstract_html":"The study of fracture is necessary in geotechnical engineering for the safe design of structures and application of engineering principles. Fracture plays a significant role in the behavior of rock and structures during failure. Often times, fracture processes observed in the laboratory do not accurately represent what occurs in the field due to the effect that specimen size and loading conditions have on fracture properties, namely, fracture toughness and the size of the fracture process zone. The fracture toughness increases with specimen size until it reaches a limiting value when the material is large enough to exhibit brittle behavior. In a similar manner, the size of the fracture process zone is observed to grow with specimen size until a limiting value is reached for a large enough specimen. In this study, experiments were performed on granitic specimens of different sizes and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to the extremely small displacements, in the order of microns, that are associated with fracture in granite. The results from experiments performed on Adelaide Black granite under three-point bending are compared to data obtained using acoustic emission on the same rock and were shown to be in good agreement. It was observed that in Charcoal granite specimens of sizes that that are typically used in the laboratory, the fracture process zone is larger under four-point bending compared to three-point bending conditions. However, it is predicted that for a large enough specimen, the dimensions of the fracture process zone are similar for both loading conditions. In addition, in the appendix, the use of ultrasonic measurements to study and determine the geometry of a propagating hydraulic fracture in granite is described.","abstract_has_math":false,"creators":["Mishaan Lilienthal, Gabriel"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Makhnenko, Roman Y."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-08-23T20:48:23Z","date_published":"2019-08-23T20:48:23Z","updated_at":"2026-07-22T22:24:44Z","subjects":["Digital Image Correlation, Fracture Process Zone, Size Dependence, Rock Mechanics"],"languages":["en"],"rights":["Copyright 2019 Gabriel Mishaan Lilienthal"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/105248","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Makhnenko, Roman Y."]},{"key":"dc:creator","label":"Author","values":["Mishaan Lilienthal, Gabriel"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-08-23T20:48:23Z","2021-08-24T09:15:31Z","2019-04-23","2019-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Digital Image Correlation, Fracture Process Zone, Size Dependence, Rock Mechanics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Gabriel Mishaan Lilienthal"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/105248"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The study of fracture is necessary in geotechnical engineering for the safe design of structures and application of engineering principles. Fracture plays a significant role in the behavior of rock and structures during failure. Often times, fracture processes observed in the laboratory do not accurately represent what occurs in the field due to the effect that specimen size and loading conditions have on fracture properties, namely, fracture toughness and the size of the fracture process zone. The fracture toughness increases with specimen size until it reaches a limiting value when the material is large enough to exhibit brittle behavior. In a similar manner, the size of the fracture process zone is observed to grow with specimen size until a limiting value is reached for a large enough specimen. In this study, experiments were performed on granitic specimens of different sizes and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to the extremely small displacements, in the order of microns, that are associated with fracture in granite. The results from experiments performed on Adelaide Black granite under three-point bending are compared to data obtained using acoustic emission on the same rock and were shown to be in good agreement. It was observed that in Charcoal granite specimens of sizes that that are typically used in the laboratory, the fracture process zone is larger under four-point bending compared to three-point bending conditions. However, it is predicted that for a large enough specimen, the dimensions of the fracture process zone are similar for both loading conditions. In addition, in the appendix, the use of ultrasonic measurements to study and determine the geometry of a propagating hydraulic fracture in granite is described.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-05-01","The student, Gabriel Mishaan Lilienthal, accepted the attached license on 2019-04-23 at 11:48.","The student, Gabriel Mishaan Lilienthal, submitted this Thesis for approval on 2019-04-23 at 11:49.","This Thesis was approved for publication on 2019-04-23 at 17:58.","DSpace SAF Submission Ingestion Package generated from Vireo submission #13838 on 2019-08-22 at 16:23:39","Made available in DSpace on 2019-08-23T20:48:23Z (GMT). No. of bitstreams: 2 MISHAANLILIENTHAL-THESIS-2019.pdf: 3991976 bytes, checksum: 7bc48d031979ecdaf03e6e7c0e4fe832 (MD5) LICENSE.txt: 4223 bytes, checksum: f12195370ce916907959b5927a25f7b0 (MD5) Previous issue date: 2019-04-23","Embargo set by: Seth Robbins for item 112370 Lift date: 2021-08-23T20:48:32Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 112370 on 2021-08-24T09:15:31Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Novel techniques for fracture monitoring in crystalline rock"]}]}],"canonical_facts":{"dc:contributor":["Makhnenko, Roman Y."],"dc:creator":["Mishaan Lilienthal, Gabriel"],"dc:date":["2019-08-23T20:48:23Z","2021-08-24T09:15:31Z","2019-04-23","2019-05"],"dc:description":["The study of fracture is necessary in geotechnical engineering for the safe design of structures and application of engineering principles. Fracture plays a significant role in the behavior of rock and structures during failure. Often times, fracture processes observed in the laboratory do not accurately represent what occurs in the field due to the effect that specimen size and loading conditions have on fracture properties, namely, fracture toughness and the size of the fracture process zone. The fracture toughness increases with specimen size until it reaches a limiting value when the material is large enough to exhibit brittle behavior. In a similar manner, the size of the fracture process zone is observed to grow with specimen size until a limiting value is reached for a large enough specimen. In this study, experiments were performed on granitic specimens of different sizes and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to the extremely small displacements, in the order of microns, that are associated with fracture in granite. The results from experiments performed on Adelaide Black granite under three-point bending are compared to data obtained using acoustic emission on the same rock and were shown to be in good agreement. It was observed that in Charcoal granite specimens of sizes that that are typically used in the laboratory, the fracture process zone is larger under four-point bending compared to three-point bending conditions. However, it is predicted that for a large enough specimen, the dimensions of the fracture process zone are similar for both loading conditions. In addition, in the appendix, the use of ultrasonic measurements to study and determine the geometry of a propagating hydraulic fracture in granite is described.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-05-01","The student, Gabriel Mishaan Lilienthal, accepted the attached license on 2019-04-23 at 11:48.","The student, Gabriel Mishaan Lilienthal, submitted this Thesis for approval on 2019-04-23 at 11:49.","This Thesis was approved for publication on 2019-04-23 at 17:58.","DSpace SAF Submission Ingestion Package generated from Vireo submission #13838 on 2019-08-22 at 16:23:39","Made available in DSpace on 2019-08-23T20:48:23Z (GMT). No. of bitstreams: 2 MISHAANLILIENTHAL-THESIS-2019.pdf: 3991976 bytes, checksum: 7bc48d031979ecdaf03e6e7c0e4fe832 (MD5) LICENSE.txt: 4223 bytes, checksum: f12195370ce916907959b5927a25f7b0 (MD5) Previous issue date: 2019-04-23","Embargo set by: Seth Robbins for item 112370 Lift date: 2021-08-23T20:48:32Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 112370 on 2021-08-24T09:15:31Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/105248"],"dc:language":["en"],"dc:rights":["Copyright 2019 Gabriel Mishaan Lilienthal"],"dc:subject":["Digital Image Correlation, Fracture Process Zone, Size Dependence, Rock Mechanics"],"dc:title":["Novel techniques for fracture monitoring in crystalline rock"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:44Z"}