Publicação
Thermal and mechanical behavior of railway tracks
| Resumo: | Railways are infrastructures subject to open weather conditions and also to temperature changes during the day and over the season. Due to this change, internal stresses may appear, whether tensile or compressive depending on the stress-free temperature and the current measure. High compressive stress may lead the track to buckle, meanwhile tensile stress can cause brittle failure. Given the importance of the temperature on railways, many models have been developed to correlate weather conditions and rail temperatures, in order to avoid the occurrence of mechanical instabilities which cause major problems in the operation of railroads. The present work validates one model developed by CNU university by comparing it with nite element solutions and also with experimental data of a rail track in the city of Mirandela-Portugal. A python package was developed to solve the model and is available to download. The model shows a good correlation between measured and simulated rail temperatures. In addition, by utilizing weather information of other locations in Portugal, the maximum expected rail temperatures were determined. Furthermore, mechanical analyses were made to analyze the critical temperature to reach the buckling mode of instability without the e ect of rolling loads and also the important parameters that a ect this phenomenon. The simulations show that the quality of the ballast and the initial miss-alignment of the track are the most important. Keywords: |
|---|---|
| Autores principais: | Frigeri, Ary Vinicius Nervis |
| Assunto: | Railway Thermal buckling Numerical simulation Finite element analysis |
| Ano: | 2021 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| _version_ | 1867173391288500224 |
|---|---|
| author | Frigeri, Ary Vinicius Nervis |
| author_facet | Frigeri, Ary Vinicius Nervis |
| author_role | author |
| contributor_name_str_mv | Minhoto, Manuel Piloto, P.A.G. Silva, Dyorgge A. Biblioteca Digital do IPB |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Frigeri, Ary Vinicius Nervis\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Minhoto, Manuel Piloto, P.A.G. Silva, Dyorgge A. Biblioteca Digital do IPB |
| datacite.creators.creator.creatorName.fl_str_mv | Frigeri, Ary Vinicius Nervis |
| datacite.date.Accepted.fl_str_mv | 2021-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2021-06-23T14:49:19Z |
| datacite.date.embargoed.fl_str_mv | 2021-06-23T14:49:19Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Railway Thermal buckling Numerical simulation Finite element analysis |
| datacite.titles.title.fl_str_mv | Thermal and mechanical behavior of railway tracks |
| dc.contributor.none.fl_str_mv | Minhoto, Manuel Piloto, P.A.G. Silva, Dyorgge A. Biblioteca Digital do IPB |
| dc.creator.none.fl_str_mv | Frigeri, Ary Vinicius Nervis |
| dc.date.Accepted.fl_str_mv | 2021-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2021-06-23T14:49:19Z |
| dc.date.embargoed.fl_str_mv | 2021-06-23T14:49:19Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10198/23684 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by-nc/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Railway Thermal buckling Numerical simulation Finite element analysis |
| dc.title.fl_str_mv | Thermal and mechanical behavior of railway tracks |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_bdcc |
| description | Railways are infrastructures subject to open weather conditions and also to temperature changes during the day and over the season. Due to this change, internal stresses may appear, whether tensile or compressive depending on the stress-free temperature and the current measure. High compressive stress may lead the track to buckle, meanwhile tensile stress can cause brittle failure. Given the importance of the temperature on railways, many models have been developed to correlate weather conditions and rail temperatures, in order to avoid the occurrence of mechanical instabilities which cause major problems in the operation of railroads. The present work validates one model developed by CNU university by comparing it with nite element solutions and also with experimental data of a rail track in the city of Mirandela-Portugal. A python package was developed to solve the model and is available to download. The model shows a good correlation between measured and simulated rail temperatures. In addition, by utilizing weather information of other locations in Portugal, the maximum expected rail temperatures were determined. Furthermore, mechanical analyses were made to analyze the critical temperature to reach the buckling mode of instability without the e ect of rolling loads and also the important parameters that a ect this phenomenon. The simulations show that the quality of the ballast and the initial miss-alignment of the track are the most important. Keywords: |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| fulltext.url.fl_str_mv | https://bibliotecadigital.ipb.pt/bitstreams/edf2cc09-67bb-48a2-9289-c54427541af1/download |
| id | ipb_95e1a400cd3bfd1af6d1789cf4bc08bf |
| identifier.url.fl_str_mv | http://hdl.handle.net/10198/23684 |
| instacron_str | ipb |
| institution | Instituto Politécnico de Bragança |
| instname_str | Instituto Politécnico de Bragança |
| language | eng |
| network_acronym_str | ipb |
| network_name_str | Biblioteca Digital do IPB |
| oai_identifier_str | oai:bibliotecadigital.ipb.pt:10198/23684 |
| organization_str_mv | urn:organizationAcronym:ipb |
| person_str_mv | Frigeri, Ary Vinicius Nervis |
| publishDate | 2021 |
| reponame_str | Biblioteca Digital do IPB |
| repository_id_str | urn:repositoryAcronym:ipb |
| service_str_mv | urn:repositoryAcronym:ipb |
| spelling | engpt_PTRailways are infrastructures subject to open weather conditions and also to temperature changes during the day and over the season. Due to this change, internal stresses may appear, whether tensile or compressive depending on the stress-free temperature and the current measure. High compressive stress may lead the track to buckle, meanwhile tensile stress can cause brittle failure. Given the importance of the temperature on railways, many models have been developed to correlate weather conditions and rail temperatures, in order to avoid the occurrence of mechanical instabilities which cause major problems in the operation of railroads. The present work validates one model developed by CNU university by comparing it with nite element solutions and also with experimental data of a rail track in the city of Mirandela-Portugal. A python package was developed to solve the model and is available to download. The model shows a good correlation between measured and simulated rail temperatures. In addition, by utilizing weather information of other locations in Portugal, the maximum expected rail temperatures were determined. Furthermore, mechanical analyses were made to analyze the critical temperature to reach the buckling mode of instability without the e ect of rolling loads and also the important parameters that a ect this phenomenon. The simulations show that the quality of the ballast and the initial miss-alignment of the track are the most important. Keywords:application/pdfpt_PTThermal and mechanical behavior of railway tracksFrigeri, Ary Vinicius NervisMinhoto, ManuelPiloto, P.A.G.Silva, Dyorgge A.HostingInstitutionOrganizationalBiblioteca Digital do IPBe-mailmailto:dspace@ipb.ptdspace@ipb.ptURNurn:tid:2027346922021-06-23T14:49:19Z20212021-01-01T00:00:00ZHandlehttp://hdl.handle.net/10198/23684http://purl.org/coar/access_right/c_abf2open accessRailwayThermal bucklingNumerical simulationFinite element analysis12447033 bytesliteraturehttp://purl.org/coar/resource_type/c_bdccmaster thesis2021http://creativecommons.org/licenses/by-nc/4.0/http://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://bibliotecadigital.ipb.pt/bitstreams/edf2cc09-67bb-48a2-9289-c54427541af1/download |
| spellingShingle | Thermal and mechanical behavior of railway tracks Frigeri, Ary Vinicius Nervis Railway Thermal buckling Numerical simulation Finite element analysis |
| status | SINGLETON |
| subject.fl_str_mv | Railway Thermal buckling Numerical simulation Finite element analysis |
| title | Thermal and mechanical behavior of railway tracks |
| title_full | Thermal and mechanical behavior of railway tracks |
| title_fullStr | Thermal and mechanical behavior of railway tracks |
| title_full_unstemmed | Thermal and mechanical behavior of railway tracks |
| title_short | Thermal and mechanical behavior of railway tracks |
| title_sort | Thermal and mechanical behavior of railway tracks |
| topic | Railway Thermal buckling Numerical simulation Finite element analysis |
| topic_facet | Railway Thermal buckling Numerical simulation Finite element analysis |
| url | http://hdl.handle.net/10198/23684 |
| visible | 1 |