A microstructure-based constitutive model for pearlite.

Fully pearlitic eutectoid steels have an excellent compromise of mechanical strength and ductility and are widely used for rails, prestressing tendons and high- strength wires. These excellent mechanical properties are a consequence of their particular nanocomposite structure combining thin cementit...

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Autor: Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69
Tipo de recurso: tesis doctoral
Fecha de publicación:2023
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/69092
Acceso en línea:https://hdl.handle.net/10171/69092
Access Level:acceso abierto
Palabra clave:Constitutive model.
Pearlitic steels.
Internal stresses.
Plasticity.
Anisotropy.
Continuum damage mechanics.
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spelling A microstructure-based constitutive model for pearlite.Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69Constitutive model.Pearlitic steels.Internal stresses.Plasticity.Anisotropy.Continuum damage mechanics.Fully pearlitic eutectoid steels have an excellent compromise of mechanical strength and ductility and are widely used for rails, prestressing tendons and high- strength wires. These excellent mechanical properties are a consequence of their particular nanocomposite structure combining thin cementite lamellae (~12% volume fraction) with ferritic lamellae. This complex substructure entails a complex microstructural and property evolution with applied strain that is difficult to model. In this work, a microstructure-based constitutive model for pearlite accounting for both the elastoplastic behaviour and the damage evolution is presented. The original formulation, valid for mesoscopic scales, considers the behaviour of ferrite and cementite separately, assuming that strengthening occurs through the mechanisms acting in ferrite. For its application in macro-scale systems such as wire drawing, a multi-colony homogenization strategy has been applied. For damage, a Continuum Damage Mechanics approach adapted to the features of pearlite has been adopted with the coupling of damage to the mechanical response. The model has been implemented for use in finite element simulations and has been calibrated using experimental data of tensile and torsion tests. Subsequently, the model has been validated, confirming its predictive capabilities across various aspects, including the mechanical response under different stress states, the build-up of internal stresses and the evolution of the microstructure with deformation.Servicio de Publicaciones. Universidad de Navarra.Alkorta-Barragán, J. (Jon)Martínez-Esnaola, J.M. (José Manuel)Dadun. Depósito Académico Digital Universidad de Navarra20242024-02-1320232023-12-0120232023-12-01doctoral thesishttp://purl.org/coar/resource_type/c_db06info:eu-repo/semantics/doctoralThesisapplication/pdfhttps://hdl.handle.net/10171/69092reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/690922026-06-21T12:47:57Z
dc.title.none.fl_str_mv A microstructure-based constitutive model for pearlite.
title A microstructure-based constitutive model for pearlite.
spellingShingle A microstructure-based constitutive model for pearlite.
Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69
Constitutive model.
Pearlitic steels.
Internal stresses.
Plasticity.
Anisotropy.
Continuum damage mechanics.
title_short A microstructure-based constitutive model for pearlite.
title_full A microstructure-based constitutive model for pearlite.
title_fullStr A microstructure-based constitutive model for pearlite.
title_full_unstemmed A microstructure-based constitutive model for pearlite.
title_sort A microstructure-based constitutive model for pearlite.
dc.creator.none.fl_str_mv Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69
author Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69
author_facet Rodríguez-Páez, J.A. (Jorge Adrián)|||/items/1ecd081f-440c-4b57-8343-dd827eae8f69
author_role author
dc.contributor.none.fl_str_mv Alkorta-Barragán, J. (Jon)
Martínez-Esnaola, J.M. (José Manuel)
Dadun. Depósito Académico Digital Universidad de Navarra
dc.subject.none.fl_str_mv Constitutive model.
Pearlitic steels.
Internal stresses.
Plasticity.
Anisotropy.
Continuum damage mechanics.
topic Constitutive model.
Pearlitic steels.
Internal stresses.
Plasticity.
Anisotropy.
Continuum damage mechanics.
description Fully pearlitic eutectoid steels have an excellent compromise of mechanical strength and ductility and are widely used for rails, prestressing tendons and high- strength wires. These excellent mechanical properties are a consequence of their particular nanocomposite structure combining thin cementite lamellae (~12% volume fraction) with ferritic lamellae. This complex substructure entails a complex microstructural and property evolution with applied strain that is difficult to model. In this work, a microstructure-based constitutive model for pearlite accounting for both the elastoplastic behaviour and the damage evolution is presented. The original formulation, valid for mesoscopic scales, considers the behaviour of ferrite and cementite separately, assuming that strengthening occurs through the mechanisms acting in ferrite. For its application in macro-scale systems such as wire drawing, a multi-colony homogenization strategy has been applied. For damage, a Continuum Damage Mechanics approach adapted to the features of pearlite has been adopted with the coupling of damage to the mechanical response. The model has been implemented for use in finite element simulations and has been calibrated using experimental data of tensile and torsion tests. Subsequently, the model has been validated, confirming its predictive capabilities across various aspects, including the mechanical response under different stress states, the build-up of internal stresses and the evolution of the microstructure with deformation.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-12-01
2023
2023-12-01
2024
2024-02-13
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/10171/69092
url https://hdl.handle.net/10171/69092
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Servicio de Publicaciones. Universidad de Navarra.
publisher.none.fl_str_mv Servicio de Publicaciones. Universidad de Navarra.
dc.source.none.fl_str_mv reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra
instname:Universidad de Navarra
instname_str Universidad de Navarra
reponame_str Dadun. Depósito Académico Digital de la Universidad de Navarra
collection Dadun. Depósito Académico Digital de la Universidad de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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