Shear band dynamics from a mesoscopic modeling of plasticity

Autores
Jagla, Eduardo Alberto
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The ubiquitous appearance of regions of localized deformation (shear bands) in different kinds of disordered materials under shear is studied in the context of a mesoscopic model of plasticity. The model allows us to include relaxational (ageing) effects. In the absence of relaxational effects the model displays a monotonically increasing dependence of stress on strain rate, and stationary shear bands do not occur. However in start-up experiments transient (although long lived) shear bands occur, that widen without bound in time. I investigate this transient effect in detail, reproducing and explaining a t1/2 law for the thickness increase of the shear band that has been obtained in atomistic numerical simulations. Relaxation produces a negatively sloped region in the stress versus strain-rate curve that stabilizes the formation of shear bands of a well-defined width, which is a function of strain rate. Simulations at very low strain rates reveal a non-trivial stick–slip dynamics of very thin shear bands that has relevance in the study of seismic phenomena. In addition, other non-stationary processes, such as stop-and-go, or strain-rate inversion situations display a phenomenology that matches very well the results of recent experimental studies.
Fil: Jagla, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Materia
slow dynamics and ageing (theory)
granular matter
plasticity (theory)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/279154
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/279154
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Shear band dynamics from a mesoscopic modeling of plasticityJagla, Eduardo Albertoslow dynamics and ageing (theory)granular matterplasticity (theory)https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The ubiquitous appearance of regions of localized deformation (shear bands) in different kinds of disordered materials under shear is studied in the context of a mesoscopic model of plasticity. The model allows us to include relaxational (ageing) effects. In the absence of relaxational effects the model displays a monotonically increasing dependence of stress on strain rate, and stationary shear bands do not occur. However in start-up experiments transient (although long lived) shear bands occur, that widen without bound in time. I investigate this transient effect in detail, reproducing and explaining a t1/2 law for the thickness increase of the shear band that has been obtained in atomistic numerical simulations. Relaxation produces a negatively sloped region in the stress versus strain-rate curve that stabilizes the formation of shear bands of a well-defined width, which is a function of strain rate. Simulations at very low strain rates reveal a non-trivial stick–slip dynamics of very thin shear bands that has relevance in the study of seismic phenomena. In addition, other non-stationary processes, such as stop-and-go, or strain-rate inversion situations display a phenomenology that matches very well the results of recent experimental studies.Fil: Jagla, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaIOP Publishing2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/279154Jagla, Eduardo Alberto; Shear band dynamics from a mesoscopic modeling of plasticity; IOP Publishing; Journal of Statistical Mechanics: Theory and Experiment; 2010; 12; 12-2010; 1-231742-5468CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/1742-5468/2010/12/P12025info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1742-5468/2010/12/P12025info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-01-14T12:08:51Zoai:ri.conicet.gov.ar:11336/279154instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-01-14 12:08:51.382CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Shear band dynamics from a mesoscopic modeling of plasticity
title Shear band dynamics from a mesoscopic modeling of plasticity
spellingShingle Shear band dynamics from a mesoscopic modeling of plasticity
Jagla, Eduardo Alberto
slow dynamics and ageing (theory)
granular matter
plasticity (theory)
title_short Shear band dynamics from a mesoscopic modeling of plasticity
title_full Shear band dynamics from a mesoscopic modeling of plasticity
title_fullStr Shear band dynamics from a mesoscopic modeling of plasticity
title_full_unstemmed Shear band dynamics from a mesoscopic modeling of plasticity
title_sort Shear band dynamics from a mesoscopic modeling of plasticity
dc.creator.none.fl_str_mv Jagla, Eduardo Alberto
author Jagla, Eduardo Alberto
author_facet Jagla, Eduardo Alberto
author_role author
dc.subject.none.fl_str_mv slow dynamics and ageing (theory)
granular matter
plasticity (theory)
topic slow dynamics and ageing (theory)
granular matter
plasticity (theory)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The ubiquitous appearance of regions of localized deformation (shear bands) in different kinds of disordered materials under shear is studied in the context of a mesoscopic model of plasticity. The model allows us to include relaxational (ageing) effects. In the absence of relaxational effects the model displays a monotonically increasing dependence of stress on strain rate, and stationary shear bands do not occur. However in start-up experiments transient (although long lived) shear bands occur, that widen without bound in time. I investigate this transient effect in detail, reproducing and explaining a t1/2 law for the thickness increase of the shear band that has been obtained in atomistic numerical simulations. Relaxation produces a negatively sloped region in the stress versus strain-rate curve that stabilizes the formation of shear bands of a well-defined width, which is a function of strain rate. Simulations at very low strain rates reveal a non-trivial stick–slip dynamics of very thin shear bands that has relevance in the study of seismic phenomena. In addition, other non-stationary processes, such as stop-and-go, or strain-rate inversion situations display a phenomenology that matches very well the results of recent experimental studies.
Fil: Jagla, Eduardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
description The ubiquitous appearance of regions of localized deformation (shear bands) in different kinds of disordered materials under shear is studied in the context of a mesoscopic model of plasticity. The model allows us to include relaxational (ageing) effects. In the absence of relaxational effects the model displays a monotonically increasing dependence of stress on strain rate, and stationary shear bands do not occur. However in start-up experiments transient (although long lived) shear bands occur, that widen without bound in time. I investigate this transient effect in detail, reproducing and explaining a t1/2 law for the thickness increase of the shear band that has been obtained in atomistic numerical simulations. Relaxation produces a negatively sloped region in the stress versus strain-rate curve that stabilizes the formation of shear bands of a well-defined width, which is a function of strain rate. Simulations at very low strain rates reveal a non-trivial stick–slip dynamics of very thin shear bands that has relevance in the study of seismic phenomena. In addition, other non-stationary processes, such as stop-and-go, or strain-rate inversion situations display a phenomenology that matches very well the results of recent experimental studies.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/279154
Jagla, Eduardo Alberto; Shear band dynamics from a mesoscopic modeling of plasticity; IOP Publishing; Journal of Statistical Mechanics: Theory and Experiment; 2010; 12; 12-2010; 1-23
1742-5468
CONICET Digital
CONICET
url http://hdl.handle.net/11336/279154
identifier_str_mv Jagla, Eduardo Alberto; Shear band dynamics from a mesoscopic modeling of plasticity; IOP Publishing; Journal of Statistical Mechanics: Theory and Experiment; 2010; 12; 12-2010; 1-23
1742-5468
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/1742-5468/2010/12/P12025
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1742-5468/2010/12/P12025
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.113929

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