{"id":116857,"date":"2022-05-25T00:10:53","date_gmt":"2022-05-24T23:10:53","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-contrainte-residuelle-materiaux-definition\/"},"modified":"2022-05-26T06:29:25","modified_gmt":"2022-05-26T05:29:25","slug":"quest-ce-que-la-contrainte-residuelle-materiaux-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-contrainte-residuelle-materiaux-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la contrainte r\u00e9siduelle &#8211; Mat\u00e9riaux &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Les contraintes r\u00e9siduelles sont des contraintes caus\u00e9es par les proc\u00e9d\u00e9s de fabrication.\u00a0Ce type de contrainte reste dans un mat\u00e9riau solide apr\u00e8s que la cause initiale des contraintes a \u00e9t\u00e9 supprim\u00e9e.<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Stress<\/span><\/h2>\n<p><span>En m\u00e9canique et science des mat\u00e9riaux,\u00a0<\/span><strong><span>la contrainte<\/span><\/strong><span>\u00a0(repr\u00e9sent\u00e9e par une lettre grecque minuscule sigma &#8211;\u00a0<\/span><strong><span>\u03c3<\/span><\/strong><span>) est une grandeur physique qui exprime les forces internes que les particules voisines d&rsquo;un mat\u00e9riau continu exercent les unes sur les autres, tandis que la d\u00e9formation est la mesure de la d\u00e9formation du mat\u00e9riau qui n&rsquo;est pas une grandeur physique.<\/span><\/p>\n<p><span>Bien qu&rsquo;il soit impossible de mesurer l&rsquo;intensit\u00e9 de cette contrainte, la charge externe et la zone sur laquelle elle est appliqu\u00e9e peuvent \u00eatre mesur\u00e9es.\u00a0<\/span><strong><span>La contrainte (\u03c3)<\/span><\/strong><span> peut \u00eatre assimil\u00e9e \u00e0 la charge par unit\u00e9 de surface ou \u00e0 la force (F) appliqu\u00e9e par section transversale (A) perpendiculaire \u00e0 la force comme suit:<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/stress-mechanics.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-27622\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/stress-mechanics.png\" alt=\"stress - d\u00e9finition\" width=\"256\" height=\"177\" \/><\/a><\/p>\n<p><span>Lorsqu&rsquo;un m\u00e9tal est soumis \u00e0 une charge (force), il est d\u00e9form\u00e9 ou d\u00e9form\u00e9, quelle que soit la force du m\u00e9tal ou la l\u00e9g\u00e8ret\u00e9 de la charge.\u00a0Si la charge est faible, la distorsion dispara\u00eetra probablement lorsque la charge sera retir\u00e9e.\u00a0L&rsquo;intensit\u00e9 ou le degr\u00e9 de distorsion est appel\u00e9\u00a0<\/span><strong><i><span>d\u00e9formation<\/span><\/i><\/strong><span>.\u00a0Une d\u00e9formation est appel\u00e9e\u00a0<\/span><strong><span>d\u00e9formation \u00e9lastique<\/span><\/strong><span>, si la contrainte est une fonction lin\u00e9aire de la d\u00e9formation.\u00a0En d&rsquo;autres termes, le stress et la d\u00e9formation suivent\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-hookes-law-definition\/\"><strong><span>la loi de Hooke<\/span><\/strong><\/a><span>.\u00a0Au-del\u00e0 de la r\u00e9gion lin\u00e9aire, la contrainte et la d\u00e9formation pr\u00e9sentent un comportement non lin\u00e9aire.\u00a0Ce comportement in\u00e9lastique est appel\u00e9\u00a0<\/span><strong><span>d\u00e9formation plastique.<\/span><\/strong><\/p>\n<p><span>La contrainte est la r\u00e9sistance interne, ou contre-force, d&rsquo;un mat\u00e9riau aux effets d\u00e9formants d&rsquo;une force ou d&rsquo;une charge externe.\u00a0Ces contre-forces tendent \u00e0 ramener les atomes \u00e0 leur position normale.\u00a0La r\u00e9sistance totale d\u00e9velopp\u00e9e est \u00e9gale \u00e0 la charge externe.<\/span><\/p>\n<h3><span>Contrainte r\u00e9siduelle<\/span><\/h3>\n<p><b><span>Les contraintes r\u00e9siduelles<\/span><\/b><span>\u00a0sont des contraintes caus\u00e9es par les processus de fabrication.\u00a0Ce type de contrainte reste dans un mat\u00e9riau solide apr\u00e8s que la cause initiale des contraintes a \u00e9t\u00e9 supprim\u00e9e.\u00a0Par exemple, le soudage laisse des contraintes r\u00e9siduelles dans les m\u00e9taux soud\u00e9s.\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-heat-in-physics-heat-definition\/\"><span>La chaleur<\/span><\/a><span>\u00a0du soudage peut provoquer une dilatation localis\u00e9e, qui est absorb\u00e9e pendant le soudage soit par le m\u00e9tal en fusion, soit par le placement des pi\u00e8ces \u00e0 souder.<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span><div class=\"su-accordion su-u-trim\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>References :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\u00a0<\/div><\/div><\/div><\/span><strong><span>Science des mat\u00e9riaux:<\/span><\/strong><\/p>\n<ol>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span><\/li>\n<li><span>William D. Callister, David G. Rethwisch.\u00a0Science et g\u00e9nie des mat\u00e9riaux : une introduction 9e \u00e9dition, Wiley ;\u00a09 \u00e9dition (4 d\u00e9cembre 2013), ISBN-13\u00a0: 978-1118324578.<\/span><\/li>\n<li><span>En ligneEberhart, Mark (2003).\u00a0Pourquoi les choses se cassent\u00a0: Comprendre le monde par la mani\u00e8re dont il se d\u00e9compose.\u00a0Harmonie.\u00a0ISBN 978-1-4000-4760-4.<\/span><\/li>\n<li><span>Gaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><\/li>\n<li><span>Gonzalez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1<\/span><\/li>\n<li><span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Mat\u00e9riaux: ing\u00e9nierie, science, traitement et conception (1\u00e8re \u00e9d.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><\/li>\n<li><span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<\/ol>\n<p><span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div class=\"su-divider su-divider-style-default\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Voir au dessus:<\/span><\/h2>\n<p><span>Force<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a><\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Contrainte r\u00e9siduelle &#8211; Mat\u00e9riaux<\/span><\/strong><span>, vous aidera.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous esp\u00e9rons que cet article,\u00a0Contrainte r\u00e9siduelle &#8211; Mat\u00e9riaux, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la contrainte r\u00e9siduelle - Mat\u00e9riaux - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"Les contraintes r\u00e9siduelles sont des contraintes caus\u00e9es par les processus de fabrication. 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