{"id":87147,"date":"2018-03-10T00:11:55","date_gmt":"2018-03-10T00:11:55","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/comportamiento-mecanico-y-fractura-de-mezclas-de-poliestireno-y-microesferas-de-vidrio\/"},"modified":"2018-03-10T00:11:55","modified_gmt":"2018-03-10T00:11:55","slug":"comportamiento-mecanico-y-fractura-de-mezclas-de-poliestireno-y-microesferas-de-vidrio","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/comportamiento-mecanico-y-fractura-de-mezclas-de-poliestireno-y-microesferas-de-vidrio\/","title":{"rendered":"Comportamiento mec\u00e1nico y fractura de mezclas de poliestireno y microesferas de vidrio"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Miguel S\u00e1nchez Soto <\/strong><\/h2>\n<p>En esta tesis se estudia el efecto que la introducci\u00f3n de una carga r\u00edgida de microesferas de vidrio tiene sobre las propiedades mec\u00e1nicas y sobre la fractura de los compuestos poliestireno-microesferas.  la adici\u00f3n de microesferas potencia los mecanismos de deformaci\u00f3n sucedi\u00e9ndose la nucleaci\u00f3n de microcavidades, su crecimiento, y la aparici\u00f3n y generalizaci\u00f3n del crazing. Se ha observado un gran auemtno de la deformaci\u00f3n a cedencia y a al rotura, alcanz\u00e1ndose el mayor nivel de efectividad con un 15% en peso de microesferas, porcentaje que representa el l\u00edmite de saturaci\u00f3n de la matriz. El m\u00f3dulo el\u00e1stico a tracci\u00f3n aumenta con el porcentaje que representa el l\u00edmite de saturaci\u00f3n de la matriz. El m\u00f3dulo el\u00e1stico a tracci\u00f3n aumenta con el porcentaje de microesferas mientras que disminuye la resistencia a la tracci\u00f3n. Las propiedades mec\u00e1nicas a alta velocidad de deformaci\u00f3n se han descrito satisfactoriamente a trav\u00e9s de la t\u00e9cnica de impacto por caida de dardo, siendo el mejor modelo el de flexi\u00f3n de baja energ\u00eda.  en fractura las part\u00edculas provocan la estabilizaci\u00f3n de la propagaci\u00f3n de grieta. A bajo contenido de microesferas (6% peso) predomina el car\u00e1cter inestable.Con porcentajes superioes se ha observado fractura estable. La inclusi\u00f3n de cantidades moderadas de part\u00edculas (10% en peso) da lugar a un aumento de los par\u00e1metros de fractura.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Comportamiento mec\u00e1nico y fractura de mezclas de poliestireno y microesferas de vidrio<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Comportamiento mec\u00e1nico y fractura de mezclas de poliestireno y microesferas de vidrio <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Miguel S\u00e1nchez Soto <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 31\/10\/2000<\/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>Antonio Mart\u00ednez Benasat<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ferran Espiell \u00e1lvarez <\/li>\n<li>miquel Llop manero (vocal)<\/li>\n<li>joan Vivancos caluet (vocal)<\/li>\n<li>Antonio Gordillo aubert (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Miguel S\u00e1nchez Soto En esta tesis se estudia el efecto que la introducci\u00f3n de una carga r\u00edgida [&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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