{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/41098"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/41098","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Analysis of acoustic emission waveforms from fatigue cracks on a steel bridge hanger","abstract":"Fatigue cracks on a steel bridge hanger were monitored for acoustic emission in conjunction with strain gage monitoring. Waveforms of emissions were collected and classified using source location, strain magnitude, position on strain cycle and uniqueness of waveforms as the primary criteria. A vast majority of AE from the cracks were found to be due to crack face rubbing and the crushing of corrosion products between the crack faces while limited crack growth emissions were detected. AE was monitored from A588 compact tension specimens under variable amplitude tension-tension fatigue loading, results of which were used to aid in the interpretation of AE data from the hanger. Crack growth AE were detected only on overload cycles mostly above 92% of maximum load while AE due to crack face rubbing occurred throughout the strain cycle.","abstract_html":"Fatigue cracks on a steel bridge hanger were monitored for acoustic emission in conjunction with strain gage monitoring. Waveforms of emissions were collected and classified using source location, strain magnitude, position on strain cycle and uniqueness of waveforms as the primary criteria. A vast majority of AE from the cracks were found to be due to crack face rubbing and the crushing of corrosion products between the crack faces while limited crack growth emissions were detected. AE was monitored from A588 compact tension specimens under variable amplitude tension-tension fatigue loading, results of which were used to aid in the interpretation of AE data from the hanger. Crack growth AE were detected only on overload cycles mostly above 92% of maximum load while AE due to crack face rubbing occurred throughout the strain cycle.","abstract_has_math":false,"creators":["Sison, Miguel Fernando G."],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Engineering Mechanics","degree_department":"Engineering Mechanics","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-22T22:19:16Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-02132009-172406"],"render_values":[{"text":"etd-02132009-172406","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/41098","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Engineering Mechanics"]},{"key":"dc:creator","label":"Author","values":["Sison, Miguel Fernando G."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:29:20Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:29:20Z","2009-02-13"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering Mechanics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-02132009-172406"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/41098"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Fatigue cracks on a steel bridge hanger were monitored for acoustic emission in conjunction with strain gage monitoring. Waveforms of emissions were collected and classified using source location, strain magnitude, position on strain cycle and uniqueness of waveforms as the primary criteria. A vast majority of AE from the cracks were found to be due to crack face rubbing and the crushing of corrosion products between the crack faces while limited crack growth emissions were detected. AE was monitored from A588 compact tension specimens under variable amplitude tension-tension fatigue loading, results of which were used to aid in the interpretation of AE data from the hanger. Crack growth AE were detected only on overload cycles mostly above 92% of maximum load while AE due to crack face rubbing occurred throughout the strain cycle."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Analysis of acoustic emission waveforms from fatigue cracks on a steel bridge hanger"]}]}],"canonical_facts":{"dc:contributor.department":["Engineering Mechanics"],"dc:creator":["Sison, Miguel Fernando G."],"dc:date.accessioned":["2014-03-14T21:29:20Z"],"dc:date.available":["2014-03-14T21:29:20Z","2009-02-13"],"dc:date.issued":["1995"],"dc:description.abstract":["Fatigue cracks on a steel bridge hanger were monitored for acoustic emission in conjunction with strain gage monitoring. Waveforms of emissions were collected and classified using source location, strain magnitude, position on strain cycle and uniqueness of waveforms as the primary criteria. A vast majority of AE from the cracks were found to be due to crack face rubbing and the crushing of corrosion products between the crack faces while limited crack growth emissions were detected. AE was monitored from A588 compact tension specimens under variable amplitude tension-tension fatigue loading, results of which were used to aid in the interpretation of AE data from the hanger. 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