Publicação
High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study
| Resumo: | Wood is a natural material and is submitted to many constantly changing influences. Wood as a construction material presents many advantages due its high strength and stiffness to height ratios. The main advantages of timber constructions, relatively to the use of other materials, are: ease of construction and maintenance, pleasant appearance, renewable resource, lightweight. The high vulnerability of wood due accidental conditions requires a rigorous thermal and mechanical assessment. Safety rules and others guidelines should be useful and used for wood applications. The fire safety of this type of material involves prevention, inhibition and detection. This involves appropriate design rules, installation, construction and maintenance of the wood material in different applications. If wood is submitted to a sufficient heat, a degradation thermal process occurs, producing gases accompanied by loss in serviceable cross-section and its weight. The factors which affect the burning behaviour of wood will determine the charring rate. Design models of wood structures at high temperatures take into account the cross-section loss due to char formation. This work contributes with an experimental program for evaluation of char-layer thickness in wood elements under high temperatures. Experimental results have shown a difference in charring rate and reproduced reasonably well by numerical results with the thermal properties of Eurocode 5 and a ratio of 1.5 applied by the Longitudinal/Transversal thermal conductivity. This study it allows to verify the evolution of the temperature and the char-layer throughout a wooden specimen, in different fibres orientation. The experimental results confirm that grain orientation of wood influences the char-layer evolution. The numerical program reveal of great importance also for char-layer determination. The char-layer thickness was calculated with the numerical results obtained from Ansys program and compared with experimental tests. |
|---|---|
| Autores principais: | Fonseca, E.M.M. |
| Outros Autores: | Barreira, Luísa |
| Assunto: | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| Ano: | 2011 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| _version_ | 1867172854979624960 |
|---|---|
| author | Fonseca, E.M.M. |
| author2 | Barreira, Luísa |
| author2_role | author |
| author_facet | Fonseca, E.M.M. Barreira, Luísa |
| author_role | author |
| contributor_name_str_mv | Biblioteca Digital do IPB |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Fonseca, E.M.M.\",\"Person.identifier.orcid\":\"0000-0003-1854-6514\"},{\"Person.name\":\"Barreira, Luísa\",\"Person.identifier.orcid\":\"0000-0003-0599-1280\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Biblioteca Digital do IPB |
| datacite.creators.creator.creatorName.fl_str_mv | Fonseca, E.M.M. Barreira, Luísa |
| datacite.date.Accepted.fl_str_mv | 2011-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2014-09-17T13:44:45Z |
| datacite.date.embargoed.fl_str_mv | 2014-09-17T13:44:45Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| datacite.titles.title.fl_str_mv | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| dc.contributor.none.fl_str_mv | Biblioteca Digital do IPB |
| dc.creator.none.fl_str_mv | Fonseca, E.M.M. Barreira, Luísa |
| dc.date.Accepted.fl_str_mv | 2011-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2014-09-17T13:44:45Z |
| dc.date.embargoed.fl_str_mv | 2014-09-17T13:44:45Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10198/10460 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | WIT Press |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| dc.title.fl_str_mv | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_5794 |
| description | Wood is a natural material and is submitted to many constantly changing influences. Wood as a construction material presents many advantages due its high strength and stiffness to height ratios. The main advantages of timber constructions, relatively to the use of other materials, are: ease of construction and maintenance, pleasant appearance, renewable resource, lightweight. The high vulnerability of wood due accidental conditions requires a rigorous thermal and mechanical assessment. Safety rules and others guidelines should be useful and used for wood applications. The fire safety of this type of material involves prevention, inhibition and detection. This involves appropriate design rules, installation, construction and maintenance of the wood material in different applications. If wood is submitted to a sufficient heat, a degradation thermal process occurs, producing gases accompanied by loss in serviceable cross-section and its weight. The factors which affect the burning behaviour of wood will determine the charring rate. Design models of wood structures at high temperatures take into account the cross-section loss due to char formation. This work contributes with an experimental program for evaluation of char-layer thickness in wood elements under high temperatures. Experimental results have shown a difference in charring rate and reproduced reasonably well by numerical results with the thermal properties of Eurocode 5 and a ratio of 1.5 applied by the Longitudinal/Transversal thermal conductivity. This study it allows to verify the evolution of the temperature and the char-layer throughout a wooden specimen, in different fibres orientation. The experimental results confirm that grain orientation of wood influences the char-layer evolution. The numerical program reveal of great importance also for char-layer determination. The char-layer thickness was calculated with the numerical results obtained from Ansys program and compared with experimental tests. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | conferencePaper |
| fulltext.url.fl_str_mv | https://bibliotecadigital.ipb.pt/bitstreams/5c05033d-862c-4a48-a6a2-081372e73aad/download |
| id | ipb_98d87ee7f190f1dbfbb30bf8ad80f37a |
| identifier.url.fl_str_mv | http://hdl.handle.net/10198/10460 |
| 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:10198/10460 |
| organization_str_mv | urn:organizationAcronym:ipb |
| person_str_mv | Fonseca, E.M.M. Fonseca, E.M.M. https://www.ciencia-id.pt/EB17-92E5-8374 EB17-92E5-8374 http://orcid.org/0000-0003-1854-6514 0000-0003-1854-6514 Barreira, Luísa Barreira, Luísa https://www.ciencia-id.pt/5C16-CCB5-F4F3 5C16-CCB5-F4F3 http://orcid.org/0000-0003-0599-1280 0000-0003-0599-1280 |
| publishDate | 2011 |
| publisher.none.fl_str_mv | WIT Press |
| reponame_str | Biblioteca Digital do IPB |
| repository_id_str | urn:repositoryAcronym:ipb |
| service_str_mv | urn:repositoryAcronym:ipb |
| spelling | engWIT PressporWood is a natural material and is submitted to many constantly changing influences. Wood as a construction material presents many advantages due its high strength and stiffness to height ratios. The main advantages of timber constructions, relatively to the use of other materials, are: ease of construction and maintenance, pleasant appearance, renewable resource, lightweight. The high vulnerability of wood due accidental conditions requires a rigorous thermal and mechanical assessment. Safety rules and others guidelines should be useful and used for wood applications. The fire safety of this type of material involves prevention, inhibition and detection. This involves appropriate design rules, installation, construction and maintenance of the wood material in different applications. If wood is submitted to a sufficient heat, a degradation thermal process occurs, producing gases accompanied by loss in serviceable cross-section and its weight. The factors which affect the burning behaviour of wood will determine the charring rate. Design models of wood structures at high temperatures take into account the cross-section loss due to char formation. This work contributes with an experimental program for evaluation of char-layer thickness in wood elements under high temperatures. Experimental results have shown a difference in charring rate and reproduced reasonably well by numerical results with the thermal properties of Eurocode 5 and a ratio of 1.5 applied by the Longitudinal/Transversal thermal conductivity. This study it allows to verify the evolution of the temperature and the char-layer throughout a wooden specimen, in different fibres orientation. The experimental results confirm that grain orientation of wood influences the char-layer evolution. The numerical program reveal of great importance also for char-layer determination. The char-layer thickness was calculated with the numerical results obtained from Ansys program and compared with experimental tests.application/pdfporHigh temperatures in parallel or perpendicular wood grain direction: a numerical and experimental studyPersonalFonseca, E.M.M.DSpacehttp://dspace.org/items/bff18bdf-825b-4b45-9774-4f9d94cbe33eDSpacehttp://dspace.org/items/bff18bdf-825b-4b45-9774-4f9d94cbe33eFonsecaElza M. M.Ciência IDhttps://www.ciencia-id.ptEB17-92E5-8374ORCIDhttp://orcid.org0000-0003-1854-6514Researcher IDhttps://www.researcherid.comD-4604-2011Scopus Author IDhttps://www.scopus.com7102526169PersonalBarreira, LuísaDSpacehttp://dspace.org/items/3c9dce7a-9ae1-4e9b-9135-75e9eeec865cDSpacehttp://dspace.org/items/3c9dce7a-9ae1-4e9b-9135-75e9eeec865cBarreiraLuísaCiência IDhttps://www.ciencia-id.pt5C16-CCB5-F4F3ORCIDhttp://orcid.org0000-0003-0599-1280HostingInstitutionOrganizationalBiblioteca Digital do IPBe-mailmailto:dspace@ipb.ptdspace@ipb.ptDOIIsPartOf10.2495/SAFE1101612014-09-17T13:44:45Z20112011-01-01T00:00:00ZHandlehttp://hdl.handle.net/10198/10460http://purl.org/coar/access_right/c_abf2open accessPine woodGrain directionChar-layerHigh temperaturesExperimental studyNumerical study4456359 bytesother research producthttp://purl.org/coar/resource_type/c_5794conference paperhttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://bibliotecadigital.ipb.pt/bitstreams/5c05033d-862c-4a48-a6a2-081372e73aad/downloadFourth International Conference on Safety and Security Engineering171183Porto |
| spellingShingle | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study Fonseca, E.M.M. Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| status | SINGLETON |
| subject.fl_str_mv | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| title | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| title_full | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| title_fullStr | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| title_full_unstemmed | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| title_short | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| title_sort | High temperatures in parallel or perpendicular wood grain direction: a numerical and experimental study |
| topic | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| topic_facet | Pine wood Grain direction Char-layer High temperatures Experimental study Numerical study |
| url | http://hdl.handle.net/10198/10460 |
| visible | 1 |