{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/7422"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/7422","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Avaliação de concentração de tensão em dutos danificados sob pressão interna após reparo","abstract":"This study evaluates the stress concentration of plain dents due to mechanical damage in steel pipes under internal pressure before and after repair. The work is focused on the development of a numerical model, based on the finite element method, to produce stress concentration factors of plain dents before and after applying glass fiber reinforced epoxy matrix laminate repairs with varying thicknesses. Small-scale steel pipe samples are submitted to denting and the resulting stress concentration in the damaged region is estimated under cyclic internal pressure, before and after repair execution. The finite element model developed is calibrated and validated from correlation between numerical and experimental results. Finally, a parametric study is carried out to evaluate stress concentration factors as a function of the repair thicknesses. These factors can be used in the fatigue assessment of damaged pipes, from the correction of S-N curves.","abstract_html":"This study evaluates the stress concentration of plain dents due to mechanical damage in steel pipes under internal pressure before and after repair. The work is focused on the development of a numerical model, based on the finite element method, to produce stress concentration factors of plain dents before and after applying glass fiber reinforced epoxy matrix laminate repairs with varying thicknesses. Small-scale steel pipe samples are submitted to denting and the resulting stress concentration in the damaged region is estimated under cyclic internal pressure, before and after repair execution. The finite element model developed is calibrated and validated from correlation between numerical and experimental results. Finally, a parametric study is carried out to evaluate stress concentration factors as a function of the repair thicknesses. These factors can be used in the fatigue assessment of damaged pipes, from the correction of S-N curves.","abstract_has_math":false,"creators":["Regalla, Sabrina de Almeida Pinto"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Pasqualino, Ilson Paranhos"],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-05","date_published":"2017-05","updated_at":"2026-07-24T01:16:26Z","subjects":["Engenharia oceânica","Concentração de tensão","Dutos de transporte de hidrocarbonetos"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/7422","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Pasqualino, Ilson Paranhos"]},{"key":"dc:creator","label":"Author","values":["Regalla, Sabrina de Almeida Pinto"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-04-25T18:01:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:00:43Z"]},{"key":"dc:date.issued","label":"Date","values":["2017-05"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engenharia oceânica","Concentração de tensão","Dutos de transporte de hidrocarbonetos"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/7422"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This study evaluates the stress concentration of plain dents due to mechanical damage in steel pipes under internal pressure before and after repair. The work is focused on the development of a numerical model, based on the finite element method, to produce stress concentration factors of plain dents before and after applying glass fiber reinforced epoxy matrix laminate repairs with varying thicknesses. Small-scale steel pipe samples are submitted to denting and the resulting stress concentration in the damaged region is estimated under cyclic internal pressure, before and after repair execution. The finite element model developed is calibrated and validated from correlation between numerical and experimental results. Finally, a parametric study is carried out to evaluate stress concentration factors as a function of the repair thicknesses. These factors can be used in the fatigue assessment of damaged pipes, from the correction of S-N curves."]},{"key":"dc:title","label":"Title","values":["Avaliação de concentração de tensão em dutos danificados sob pressão interna após reparo"]}]}],"canonical_facts":{"dc:contributor.advisor":["Pasqualino, Ilson Paranhos"],"dc:creator":["Regalla, Sabrina de Almeida Pinto"],"dc:date.accessioned":["2019-04-25T18:01:22Z"],"dc:date.available":["2026-05-16T03:00:43Z"],"dc:date.issued":["2017-05"],"dc:description.abstract":["This study evaluates the stress concentration of plain dents due to mechanical damage in steel pipes under internal pressure before and after repair. The work is focused on the development of a numerical model, based on the finite element method, to produce stress concentration factors of plain dents before and after applying glass fiber reinforced epoxy matrix laminate repairs with varying thicknesses. Small-scale steel pipe samples are submitted to denting and the resulting stress concentration in the damaged region is estimated under cyclic internal pressure, before and after repair execution. The finite element model developed is calibrated and validated from correlation between numerical and experimental results. Finally, a parametric study is carried out to evaluate stress concentration factors as a function of the repair thicknesses. These factors can be used in the fatigue assessment of damaged pipes, from the correction of S-N curves."],"dc:identifier.uri":["http://hdl.handle.net/11422/7422"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Engenharia oceânica","Concentração de tensão","Dutos de transporte de hidrocarbonetos"],"dc:title":["Avaliação de concentração de tensão em dutos danificados sob pressão interna após reparo"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:26Z"}