{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/3576"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/3576","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Principios variacionales y soluciones numéricas en elasto-visco-plasticidad","abstract":"In the first part of this work a viscoplastic model is studied and it is shown how the viscoplasticity theory can be used not only to model this behavior but also to model plasticity as well as creep. The mixed-initial boundary value problem in elasto/viscoplasticity is presented for the case of quasi-static iso- thermal process and infinitesimal deformations. Different variational formulations related to the above boundary value problan are also deduced. A numerical algorithm based on the Finit Element Method and the Euler's Method, for the spacial and time cretizations respectively is presented. The algorithm in then used to obtain approximate solutions in elasto-plasticity, secundary creep and elasto/ viscoplasticity problems.","abstract_html":"In the first part of this work a viscoplastic model is studied and it is shown how the viscoplasticity theory can be used not only to model this behavior but also to model plasticity as well as creep. The mixed-initial boundary value problem in elasto/viscoplasticity is presented for the case of quasi-static iso- thermal process and infinitesimal deformations. Different variational formulations related to the above boundary value problan are also deduced. A numerical algorithm based on the Finit Element Method and the Euler's Method, for the spacial and time cretizations respectively is presented. The algorithm in then used to obtain approximate solutions in elasto-plasticity, secundary creep and elasto/ viscoplasticity problems.","abstract_has_math":false,"creators":["Taroco, Edgar"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Feijóo, Raul Antonino"],"committee_chairs":[],"committee_members":[],"year":1980,"date_issued":"1980-03","date_published":"1980-03","updated_at":"2026-07-24T01:16:04Z","subjects":["Viscoplsticidade das estruturas","Resistência dos materiais","Método dos elementos finitos"],"languages":["spa"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/3576","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Feijóo, Raul Antonino"]},{"key":"dc:creator","label":"Author","values":["Taroco, Edgar"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-01-31T11:33:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:04:32Z"]},{"key":"dc:date.issued","label":"Date","values":["1980-03"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Tese"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Viscoplsticidade das estruturas","Resistência dos materiais","Método dos elementos finitos"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["spa"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/3576"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In the first part of this work a viscoplastic model is studied and it is shown how the viscoplasticity theory can be used not only to model this behavior but also to model plasticity as well as creep. The mixed-initial boundary value problem in elasto/viscoplasticity is presented for the case of quasi-static iso- thermal process and infinitesimal deformations. Different variational formulations related to the above boundary value problan are also deduced. A numerical algorithm based on the Finit Element Method and the Euler's Method, for the spacial and time cretizations respectively is presented. The algorithm in then used to obtain approximate solutions in elasto-plasticity, secundary creep and elasto/ viscoplasticity problems.","Estudia en primer término el mode lo viscoplástico, analizando sús propiedades y mostrando como a partir de leyes constitutivas viscoplásticas es posible obtener correspondientes leyes plásticas y de creep secundario. Posteriormente se formula el problema de valor de contorno en elasto/viscoplasticidad dentro de la teoria de formaciones infinitesimales, para procesos cuasi-estáticos y se deducen los princípios variacionales correspondientes. Se presenta un algoritmo numérico basado en el Método de Elementos Finitos para la aproximación espacial y en el Método de Euler para la integración en el tiempo. Finalmente empleando el algoritmo anterior se obtienen soluciones aproximadas en problemas de plasticidad, creep secundario y elasto/viscoplasticidad."]},{"key":"dc:title","label":"Title","values":["Principios variacionales y soluciones numéricas en elasto-visco-plasticidad"]}]}],"canonical_facts":{"dc:contributor.advisor":["Feijóo, Raul Antonino"],"dc:creator":["Taroco, Edgar"],"dc:date.accessioned":["2018-01-31T11:33:22Z"],"dc:date.available":["2026-05-16T03:04:32Z"],"dc:date.issued":["1980-03"],"dc:description.abstract":["In the first part of this work a viscoplastic model is studied and it is shown how the viscoplasticity theory can be used not only to model this behavior but also to model plasticity as well as creep. The mixed-initial boundary value problem in elasto/viscoplasticity is presented for the case of quasi-static iso- thermal process and infinitesimal deformations. Different variational formulations related to the above boundary value problan are also deduced. A numerical algorithm based on the Finit Element Method and the Euler's Method, for the spacial and time cretizations respectively is presented. The algorithm in then used to obtain approximate solutions in elasto-plasticity, secundary creep and elasto/ viscoplasticity problems.","Estudia en primer término el mode lo viscoplástico, analizando sús propiedades y mostrando como a partir de leyes constitutivas viscoplásticas es posible obtener correspondientes leyes plásticas y de creep secundario. Posteriormente se formula el problema de valor de contorno en elasto/viscoplasticidad dentro de la teoria de formaciones infinitesimales, para procesos cuasi-estáticos y se deducen los princípios variacionales correspondientes. Se presenta un algoritmo numérico basado en el Método de Elementos Finitos para la aproximación espacial y en el Método de Euler para la integración en el tiempo. Finalmente empleando el algoritmo anterior se obtienen soluciones aproximadas en problemas de plasticidad, creep secundario y elasto/viscoplasticidad."],"dc:identifier.uri":["http://hdl.handle.net/11422/3576"],"dc:language":["spa"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Viscoplsticidade das estruturas","Resistência dos materiais","Método dos elementos finitos"],"dc:title":["Principios variacionales y soluciones numéricas en elasto-visco-plasticidad"],"dc:type":["Tese"]},"updated_at":"2026-07-24T01:16:04Z"}