{"id":12445,"date":"2018-03-09T08:58:18","date_gmt":"2018-03-09T08:58:18","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/comportamiento-en-fatiga-de-poliamidas-reforzadas-con-fibra-de-vidrio-corta\/"},"modified":"2018-03-09T08:58:18","modified_gmt":"2018-03-09T08:58:18","slug":"comportamiento-en-fatiga-de-poliamidas-reforzadas-con-fibra-de-vidrio-corta","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/comportamiento-en-fatiga-de-poliamidas-reforzadas-con-fibra-de-vidrio-corta\/","title":{"rendered":"Comportamiento en fatiga de poliamidas reforzadas con fibra de vidrio corta"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Antonio Casado Del Prado <\/strong><\/h2>\n<p>En esta tesis se constata experimentalmente la existencia de tres estados diferentes en el comportamiento en fatiga de la pliamida reforzda con fibra de vidrio hasta el instante en que se produce su rotura, cada uno de los cuales puede ser descrito como se establece a continuaci\u00f3n:  1,- en el suelo i se producen procesos de deformaci\u00f3n por fluencia transitoria (d2e\/dn2&lt;0) durante los que el desafse entre las se\u00f1ales de variaci\u00f3n tensional impuesta y la de variaci\u00f3n de deformaci\u00f3n resultante en el material, conlleva una disipaci\u00f3n de energ\u00eda en el material, que se transforma en valor y hace que aumente la temperatura del mismo. De esta forma, para una varaici\u00f3n tensional dada, se produce una disminuci\u00f3n del m\u00f3dulo de elasticidad del material y un aumento en su deformaci\u00f3n. En funci\u00f3n de que la t se mantega constante o aumente de forma progresiva, el proceso alcanza la estabilidad necesaria para que \u00e9ste soporte un n\u00famero ilimitado de ciclos o, de lo contrario, adquiere una deformaci\u00f3n para la que se produce la transici\u00f3n al estado ii.  2,- el estado ii se caracteriza porque en \u00e9l la velocidad de deformaci\u00f3n del material es constante (d2e\/dn2=0), inici\u00e1ndose, de forma simult\u00e1nea, el \u00abcrazing\u00bb en el mismo. En estas condiciones, la velocidad de disipaci\u00f3n de energ\u00eda por cilco crece de forma constante, (d2e\/dn2=0), aumentando de forma estable la temperatura del material.Este proceso conduce a la inestabilidad final, que se inicia cuando la deformaci\u00f3n del material alcanza el valor para el que sucede una segunda transici\u00f3n al estado iii.  3,- el estado iii es aqu\u00e9l para el que se produce de inestabilidad local en el material que antecede a su rotura. Ello se debe a que, en alguna zona del material,la cuant\u00eda.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Comportamiento en fatiga de poliamidas reforzadas con fibra de vidrio corta<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Comportamiento en fatiga de poliamidas reforzadas con fibra de vidrio corta <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Antonio Casado Del Prado <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Cantabria<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/07\/2001<\/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>Federico Gutierrez Solana Salcedo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Mar\u00eda Varona ruiz <\/li>\n<li>Antonio Mart\u00ednez benasat (vocal)<\/li>\n<li>Jos\u00e9 Zapatero arenaza (vocal)<\/li>\n<li> Belzluence varela Francisco Javier (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Antonio Casado Del Prado En esta tesis se constata experimentalmente la existencia de tres estados diferentes [&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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