{"id":20789,"date":"2018-03-09T09:10:18","date_gmt":"2018-03-09T09:10:18","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-la-propagacion-de-fisuras-en-materiales-ductiles\/"},"modified":"2018-03-09T09:10:18","modified_gmt":"2018-03-09T09:10:18","slug":"estudio-de-la-propagacion-de-fisuras-en-materiales-ductiles","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/politecnica-de-madrid\/estudio-de-la-propagacion-de-fisuras-en-materiales-ductiles\/","title":{"rendered":"Estudio de la propagaci\u00f3n de fisuras en materiales d\u00factiles"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Roberto Maurice Flores Le Roux <\/strong><\/h2>\n<p>Este trabajo presenta un m\u00e9todo para el an\u00e1lisis de los procesos de fisuraci\u00f3n de materiales d\u00factiles.  el micromecanismo de fallo m\u00e1s corriente en aleaciones de elevada tenacidad es la coalescencia de microcavidades. El modelo de gursosn se ha desarrollado con el fin de reproducir este proceso. Incorpora el efecto de la tensi\u00f3n hidrost\u00e1tica en la superficie de flujo y predice la aparici\u00f3n de una componente dilatadora de la deformaci\u00f3n pl\u00e1stica.  implementado mediante el m\u00e9todo de los elementos finitos, el modelo de gurson permite analizar situaciones intratables mediante la mec\u00e1nica de fractura cl\u00e1sica. La aplicaci\u00f3n del an\u00e1lisis est\u00e1tico impl\u00edcito a los casos de propagaci\u00f3n lenta de fisuras resulta muy costosa, especialmente si se consideran efectos tridimensionales. Se ha estudiado la viabilidad del an\u00e1lisis din\u00e1mico expl\u00edcito aplicado a este problema. Se comprueba que es posible obtener soluciones robustos a tiempo que se reduce sensiblemente el coste computacional.  se detalla una t\u00e9cnica de clibraci\u00f3n que permite estimar f\u00e1cilmente los par\u00e1metros relevantes del modelo. Se muestra la aplicaci\u00f3n del mismo a un caso pr\u00e1ctico en el que los efectos tridimensionales son muy importantes. se ha elegido una configuraci\u00f3n en la que la distribuci\u00f3n de esfuerzos es muy diferente a la existente en los ensayos utilizados en el proceso de calibraci\u00f3n. Los resultados num\u00e9ricos reproducen correctamente las mediciones experimentales pese al cambio de la severidad de la solicitaci\u00f3n.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio de la propagaci\u00f3n de fisuras en materiales d\u00factiles<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio de la propagaci\u00f3n de fisuras en materiales d\u00factiles <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Roberto Maurice Flores Le Roux <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/12\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Miguel Angel Astiz Suarez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: andr\u00e9s Valiente cancho <\/li>\n<li>Jos\u00e9 Fern\u00e1ndez s\u00e1ez (vocal)<\/li>\n<li>eugenio O\u00f1ate ib\u00e1\u00f1ez de navarra (vocal)<\/li>\n<li>federico Gutierrez solana salcedo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Roberto Maurice Flores Le Roux Este trabajo presenta un m\u00e9todo para el an\u00e1lisis de los procesos de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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