Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials

Viscoplastic constitutive formulations are characterized by instantaneous tangent operators which do no exhibit degradation from the elastic properties. As a consequence Viscoplastic materials descriptions were often advocated to retrofit the shortcomings of the inviscid elastoplastic formulations s...

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Detalles Bibliográficos
Autores: Etse, Jose Guillermo, Carosio, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/105137
Acceso en línea:http://hdl.handle.net/11336/105137
Access Level:acceso abierto
Palabra clave:VISCOPLASTICITY
FAILURE
LOCALIZATION
TANGENT
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
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spelling Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materialsEtse, Jose GuillermoCarosio, A.VISCOPLASTICITYFAILURELOCALIZATIONTANGENThttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Viscoplastic constitutive formulations are characterized by instantaneous tangent operators which do no exhibit degradation from the elastic properties. As a consequence Viscoplastic materials descriptions were often advocated to retrofit the shortcomings of the inviscid elastoplastic formulations such as loss of stability and loss of ellipticity. However, when the time integration of Viscoplastic material processes is considered within finite time increments, there exists an algorithmic tangent operator which may lead to loss of stability and loss of ellipticity similar to rate-independent elastoplastic materials. The algorithmic tangent operator follows from the consistent linearization process. Therefore, the numerical method considered for the time integration of the constitutive equations plays a fundamental role in failure analysis of Viscoplastic materials. This paper focuses in the performance of the conditions form diffuse and localized failure of two Perzyna-type Viscoplastic models, one of them based on the classical formulation and the other one based on a new proposal by Ponthot (1995) which includes a constrain condition representing a rate dependent generalization of the plasticity`s yield condition. Application of Backward Euler method form time integration of both Perzyna formulations leads to quite different form of the consistent tangent material operators. These stiffness tensors are obtained for Perzyna generalizations of the so called Extended Leon Model which is a fracture energy-based elastoplastic constitutive model for concrete. The results included in the paper illustrate the strong differences between the failure predictions of both Perzyna-type Viscoplastic formulations. In this regard, the classical formulation is unable to reproduce the predictions of the inviscid model when the viscosity approaches zero. This case leads to very small values of both failures indicators and their performances are characterized by strong oscillations and even discontinuities. On the other hand the so-called continuous formulation is associated with algorithmic tangent moduli which signals a smooth transition from the elastic operator to the elastoplastic algorithmic one, when the viscosity varies from very large to very small values.Fil: Etse, Jose Guillermo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Carosio, A.. Universidad Nacional de Cuyo; ArgentinaPlanta Piloto de Ingeniería Química2002-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/105137Etse, Jose Guillermo; Carosio, A.; Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials; Planta Piloto de Ingeniería Química; Latin American Applied Research; 32; 12-2002; 21-310327-07931851-8796CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.laar.plapiqui.edu.ar/OJS/public/site/volumens/indexes/artic_v3201/32_(2002)_021_31.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:56:15Zoai:ri.conicet.gov.ar:11336/105137instacron: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:34982024-05-08 13:56:15.759CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
title Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
spellingShingle Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
Etse, Jose Guillermo
VISCOPLASTICITY
FAILURE
LOCALIZATION
TANGENT
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
title_short Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
title_full Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
title_fullStr Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
title_full_unstemmed Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
title_sort Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials
dc.creator.none.fl_str_mv Etse, Jose Guillermo
Carosio, A.
author Etse, Jose Guillermo
author_facet Etse, Jose Guillermo
Carosio, A.
author_role author
author2 Carosio, A.
author2_role author
dc.subject.none.fl_str_mv VISCOPLASTICITY
FAILURE
LOCALIZATION
TANGENT
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
topic VISCOPLASTICITY
FAILURE
LOCALIZATION
TANGENT
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
description Viscoplastic constitutive formulations are characterized by instantaneous tangent operators which do no exhibit degradation from the elastic properties. As a consequence Viscoplastic materials descriptions were often advocated to retrofit the shortcomings of the inviscid elastoplastic formulations such as loss of stability and loss of ellipticity. However, when the time integration of Viscoplastic material processes is considered within finite time increments, there exists an algorithmic tangent operator which may lead to loss of stability and loss of ellipticity similar to rate-independent elastoplastic materials. The algorithmic tangent operator follows from the consistent linearization process. Therefore, the numerical method considered for the time integration of the constitutive equations plays a fundamental role in failure analysis of Viscoplastic materials. This paper focuses in the performance of the conditions form diffuse and localized failure of two Perzyna-type Viscoplastic models, one of them based on the classical formulation and the other one based on a new proposal by Ponthot (1995) which includes a constrain condition representing a rate dependent generalization of the plasticity`s yield condition. Application of Backward Euler method form time integration of both Perzyna formulations leads to quite different form of the consistent tangent material operators. These stiffness tensors are obtained for Perzyna generalizations of the so called Extended Leon Model which is a fracture energy-based elastoplastic constitutive model for concrete. The results included in the paper illustrate the strong differences between the failure predictions of both Perzyna-type Viscoplastic formulations. In this regard, the classical formulation is unable to reproduce the predictions of the inviscid model when the viscosity approaches zero. This case leads to very small values of both failures indicators and their performances are characterized by strong oscillations and even discontinuities. On the other hand the so-called continuous formulation is associated with algorithmic tangent moduli which signals a smooth transition from the elastic operator to the elastoplastic algorithmic one, when the viscosity varies from very large to very small values.
publishDate 2002
dc.date.none.fl_str_mv 2002-12
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/11336/105137
Etse, Jose Guillermo; Carosio, A.; Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials; Planta Piloto de Ingeniería Química; Latin American Applied Research; 32; 12-2002; 21-31
0327-0793
1851-8796
CONICET Digital
CONICET
url http://hdl.handle.net/11336/105137
identifier_str_mv Etse, Jose Guillermo; Carosio, A.; Diffuse and localized failure predictions of Perzyna viscoplastic models for cohesive-frictional materials; Planta Piloto de Ingeniería Química; Latin American Applied Research; 32; 12-2002; 21-31
0327-0793
1851-8796
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.laar.plapiqui.edu.ar/OJS/public/site/volumens/indexes/artic_v3201/32_(2002)_021_31.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Planta Piloto de Ingeniería Química
publisher.none.fl_str_mv Planta Piloto de Ingeniería Química
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,811543

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