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iniciais que actuam como fendas. A análise é efectuada de modo a estimar o número de ciclos necessário para o
crescimento de um defeito inicial até este atingir uma dimensão crítica responsável pela ruína da estrutura. A
vida passada na fase de iniciação das fendas não é considerada neste método, o que pode subestimar significativamente
a vida real de uma estrutura. Este erro é particularmente importante no caso de vidas longas, para as
quais a fase de iniciação pode atingir, em determinados casos, valores da ordem de 80% da vida total à fadiga.
Dentro dos métodos actualmente usados na previsão da iniciação de uma fenda, os métodos locais são os mais
importantes. A sua aplicação exige o prévio conhecimento das propriedades elastoplásticas cíclicas do material.
Assim, apresentam-se neste trabalho um conjunto de resultados de ensaios realizados para obtenção das propriedades
elastoplásticas cíclicas e de fadiga oligocíclica para a liga de alumínio 6061-T651.03942<a class="citation_author_name" title="Browse by Author Name for Da Silva Ribeiro, Alfredo" href="/fez/list/author/Da Silva Ribeiro, Alfredo/">Da Silva Ribeiro, Alfredo</a>, <a class="citation_author_name" title="Browse by Author Name for De Jesus, Abílio M.P." href="/fez/list/author/De Jesus, Abílio M.P./">De Jesus, Abílio M.P.</a> and <a class="citation_author_name" title="Browse by Author Name for Fernandes, António A." href="/fez/list/author/Fernandes, António A./">Fernandes, António A.</a> . (<span class="citation_date">2007</span>) <a class="citation_title" title="Click para ver : Comportamiento elastoplástico cíclico e à fadiga da liga de alumínio 6061-T651" href="/fez/view/bibliuned:iberoingmecanica-2007-vol11-n2-04">Comportamiento elastoplástico cíclico e à fadiga da liga de alumínio 6061-T651</a>. RecordArtículo de revistaPublishedhttp://udcdata.info/041674Ingeniería MecánicaUniversidad Nacional de Educación a Distancia (España)Da Silva Ribeiro, AlfredoDe Jesus, Abílio M.P.Fernandes, António A.bibliuned:iberoingmecanica-2007-vol11-n2-04http://e-spacio.uned.es/fez/view/bibliuned:iberoingmecanica-2007-vol11-n2-04porDocumento.pdfbibliuned:iberoingmecanica-2007-vol.11-n.2bibliuned:Setopenairebibliuned:SetarticuloRevista iberoamericana de ingeniería mecánica. Año 2007, vol. 11, n. 2Set de openaireSet de artículohttp://creativecommons.org/licenses/by-nc-nd/4.0Licencia Creative CommonsDa Silva RibeiroAcceso abierto1.24915