{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83248"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83248","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A Heat Transfer Modeling Study of Rail Thermite Welding","abstract":"This investigation is concerned with the effect of welding conditions on the development of fatigue-critical weld defects in rail thermite welds. Finite Element Modeling (FEM) was used to analyze the heat transfer behavior during the thermite welding process. The results of the thermal analyses were correlated to the development of various weld defects and compared with measurements performed on laboratory thermite welds. The effects of welding parameters on weld defect development were explored through a series of thermal simulations. It was found that a wider weld gap, a longer preheating time, and a higher liquid temperature help to reduce the occurrence of the most severe weld defects in thermite welds. The influence of welding conditions were summarized in defect formation maps which can be used to guide the selection of welding parameters for improving the quality and reliability of thermite welds.","abstract_html":"This investigation is concerned with the effect of welding conditions on the development of fatigue-critical weld defects in rail thermite welds. Finite Element Modeling (FEM) was used to analyze the heat transfer behavior during the thermite welding process. The results of the thermal analyses were correlated to the development of various weld defects and compared with measurements performed on laboratory thermite welds. The effects of welding parameters on weld defect development were explored through a series of thermal simulations. It was found that a wider weld gap, a longer preheating time, and a higher liquid temperature help to reduce the occurrence of the most severe weld defects in thermite welds. The influence of welding conditions were summarized in defect formation maps which can be used to guide the selection of welding parameters for improving the quality and reliability of thermite welds.","abstract_has_math":false,"creators":["Chen, Yiren"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Lawrence, Frederick V., Jr"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:03:52Z","date_published":"2015-09-25T21:03:52Z","updated_at":"2026-07-22T22:26:20Z","subjects":["Engineering, Metallurgy"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3160872"],"render_values":[{"text":"(MiAaPQ)AAI3160872","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83248","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lawrence, Frederick V., Jr"]},{"key":"dc:creator","label":"Author","values":["Chen, Yiren"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:03:52Z","10000-01-01","2004"]},{"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":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Engineering, Metallurgy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83248","(MiAaPQ)AAI3160872"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This investigation is concerned with the effect of welding conditions on the development of fatigue-critical weld defects in rail thermite welds. Finite Element Modeling (FEM) was used to analyze the heat transfer behavior during the thermite welding process. The results of the thermal analyses were correlated to the development of various weld defects and compared with measurements performed on laboratory thermite welds. The effects of welding parameters on weld defect development were explored through a series of thermal simulations. It was found that a wider weld gap, a longer preheating time, and a higher liquid temperature help to reduce the occurrence of the most severe weld defects in thermite welds. The influence of welding conditions were summarized in defect formation maps which can be used to guide the selection of welding parameters for improving the quality and reliability of thermite welds.","Made available in DSpace on 2015-09-25T21:03:52Z (GMT). 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Finite Element Modeling (FEM) was used to analyze the heat transfer behavior during the thermite welding process. The results of the thermal analyses were correlated to the development of various weld defects and compared with measurements performed on laboratory thermite welds. The effects of welding parameters on weld defect development were explored through a series of thermal simulations. It was found that a wider weld gap, a longer preheating time, and a higher liquid temperature help to reduce the occurrence of the most severe weld defects in thermite welds. The influence of welding conditions were summarized in defect formation maps which can be used to guide the selection of welding parameters for improving the quality and reliability of thermite welds.","Made available in DSpace on 2015-09-25T21:03:52Z (GMT). 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