{"id":116844,"date":"2022-05-24T20:49:02","date_gmt":"2022-05-24T19:49:02","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition\/"},"modified":"2022-05-25T13:47:38","modified_gmt":"2022-05-25T12:47:38","slug":"quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la r\u00e9sistance ultime \u00e0 la traction &#8211; UTS &#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\">La r\u00e9sistance \u00e0 la traction ultime est le maximum sur la courbe contrainte-d\u00e9formation technique.\u00a0La r\u00e9sistance \u00e0 la traction ultime est souvent abr\u00e9g\u00e9e en \u00ab\u00a0r\u00e9sistance \u00e0 la traction\u00a0\u00bb ou m\u00eame en \u00ab\u00a0l&rsquo;ultime\u00a0\u00bb.<\/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\"><b><br \/>\n<\/b>\n<p><strong><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Stress-strain-curve-Strength-of-Materials.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright wp-image-27803\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Stress-strain-curve-Strength-of-Materials.png\" alt=\"Courbe contrainte-d\u00e9formation - R\u00e9sistance des mat\u00e9riaux\" width=\"467\" height=\"409\" \/><\/a><\/strong><span>Un diagramme sch\u00e9matique de la\u00a0<\/span><strong><span>courbe contrainte-d\u00e9formation<\/span><\/strong><span>\u00a0de l&rsquo;acier \u00e0 faible teneur en carbone \u00e0 temp\u00e9rature ambiante est pr\u00e9sent\u00e9 dans la figure.\u00a0Il existe plusieurs \u00e9tapes montrant des comportements diff\u00e9rents, ce qui sugg\u00e8re des propri\u00e9t\u00e9s m\u00e9caniques diff\u00e9rentes.\u00a0Pour clarifier, les mat\u00e9riaux peuvent manquer une ou plusieurs \u00e9tapes indiqu\u00e9es sur la figure, ou avoir des \u00e9tapes totalement diff\u00e9rentes.\u00a0Dans ce cas, nous devons faire la distinction entre les caract\u00e9ristiques de contrainte-d\u00e9formation des mat\u00e9riaux\u00a0<\/span><strong><span>ductiles<\/span><\/strong><span>\u00a0et\u00a0<\/span><strong><span>fragiles<\/span><\/strong><span>.\u00a0Les points suivants d\u00e9crivent les diff\u00e9rentes r\u00e9gions de la courbe contrainte-d\u00e9formation et l&rsquo;importance de plusieurs emplacements sp\u00e9cifiques.<\/span><\/p>\n<h2><b><\/b><span>R\u00e9sistance \u00e0 la traction ultime<\/span><\/h2>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Yield-Strength-Ultimate-Tensile-Strength-Table-of-Materials.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-full wp-image-27807\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Yield-Strength-Ultimate-Tensile-Strength-Table-of-Materials.png\" alt=\"Limite d'\u00e9lasticit\u00e9 - R\u00e9sistance \u00e0 la traction ultime - Tableau des mat\u00e9riaux\" width=\"349\" height=\"438\" \/><\/a><span>La\u00a0<\/span><strong><span>r\u00e9sistance \u00e0 la traction ultime<\/span><\/strong><span>\u00a0est le maximum sur la courbe technique de contrainte-d\u00e9formation.\u00a0Cela correspond \u00e0 la\u00a0<\/span><strong><span>contrainte maximale <\/span><\/strong><span>qui peut \u00eatre soutenu par une structure en tension.\u00a0La r\u00e9sistance \u00e0 la traction ultime est souvent abr\u00e9g\u00e9e en \u00ab\u00a0r\u00e9sistance \u00e0 la traction\u00a0\u00bb ou m\u00eame en \u00ab\u00a0l&rsquo;ultime\u00a0\u00bb.\u00a0Si cette contrainte est appliqu\u00e9e et maintenue, une fracture en r\u00e9sultera.\u00a0Souvent, cette valeur est nettement sup\u00e9rieure \u00e0 la limite d&rsquo;\u00e9lasticit\u00e9 (jusqu&rsquo;\u00e0 50 \u00e0 60 % de plus que le rendement pour certains types de m\u00e9taux).\u00a0Lorsqu&rsquo;un mat\u00e9riau ductile atteint sa r\u00e9sistance ultime, il subit une striction o\u00f9 la section transversale se r\u00e9duit localement.\u00a0La courbe contrainte-d\u00e9formation ne contient pas de contrainte sup\u00e9rieure \u00e0 la r\u00e9sistance ultime.\u00a0M\u00eame si les d\u00e9formations peuvent continuer \u00e0 augmenter, la contrainte diminue g\u00e9n\u00e9ralement apr\u00e8s que la r\u00e9sistance ultime a \u00e9t\u00e9 atteinte.\u00a0C&rsquo;est une propri\u00e9t\u00e9 intensive;\u00a0sa valeur ne d\u00e9pend donc pas de la taille de l&rsquo;\u00e9prouvette.\u00a0Cependant, cela d\u00e9pend d&rsquo;autres facteurs, <\/span><strong><span>temp\u00e9rature<\/span><\/strong><span>\u00a0de l&rsquo;environnement et du mat\u00e9riau d&rsquo;essai.\u00a0<\/span><strong><span>Les r\u00e9sistances ultimes \u00e0 la traction<\/span><\/strong><span>\u00a0varient de 50 MPa pour un aluminium jusqu&rsquo;\u00e0 3000 MPa pour les aciers \u00e0 tr\u00e8s haute r\u00e9sistance.<\/span><\/p>\n<h2><span id=\"Strain_Hardening\"><span>Ecrouissage<\/span><\/span><\/h2>\n<p><span>L&rsquo;une des \u00e9tapes de la <\/span><strong><span>courbe contrainte-d\u00e9formation<\/span><\/strong><span> est la<\/span><strong><span>\u00a0r\u00e9gion d&rsquo;\u00e9crouissage<\/span><\/strong><span>.\u00a0Cette r\u00e9gion commence lorsque la d\u00e9formation <\/span><strong><span>d\u00e9passe la limite d&rsquo;\u00e9lasticit\u00e9<\/span><\/strong><span>\u00a0et se termine au point de r\u00e9sistance ultime, qui est la contrainte maximale indiqu\u00e9e sur la courbe contrainte-d\u00e9formation.\u00a0Dans cette r\u00e9gion, la contrainte augmente principalement \u00e0 mesure que le mat\u00e9riau s&rsquo;allonge, sauf qu&rsquo;il y a une r\u00e9gion presque plate au d\u00e9but.\u00a0<\/span><strong><span>L&rsquo;\u00e9crouissage<\/span><\/strong><span> est aussi appel\u00e9 <\/span><strong><span>\u00e9crouissage<\/span><\/strong><span> ou\u00a0<\/span><strong><span>travail \u00e0 froid<\/span><\/strong><span>.\u00a0C&rsquo;est ce qu&rsquo;on appelle le travail \u00e0 froid car la d\u00e9formation plastique doit se produire \u00e0 une temp\u00e9rature suffisamment basse pour que les atomes ne puissent pas se r\u00e9arranger.\u00a0C&rsquo;est un processus qui rend un m\u00e9tal plus dur et plus r\u00e9sistant par d\u00e9formation plastique.\u00a0Lorsqu&rsquo;un m\u00e9tal est d\u00e9form\u00e9 plastiquement,\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/crystallographic-defects\/line-defects-dislocations\/\"><span>les dislocations<\/span><\/a><span> se d\u00e9placent et des dislocations suppl\u00e9mentaires sont g\u00e9n\u00e9r\u00e9es.\u00a0Les dislocations peuvent se d\u00e9placer si les atomes de l&rsquo;un des plans environnants rompent leurs liaisons et rebondissent avec les atomes au bord de terminaison.\u00a0La densit\u00e9 de dislocations dans un m\u00e9tal augmente avec la d\u00e9formation ou le travail \u00e0 froid en raison de la multiplication des dislocations ou de la formation de nouvelles dislocations.\u00a0Plus il y a de dislocations dans un mat\u00e9riau, plus elles interagissent et s&rsquo;\u00e9pinglent ou s&#8217;emm\u00ealent.\u00a0Il en r\u00e9sultera une diminution de la mobilit\u00e9 des luxations et un renforcement du mat\u00e9riau.<\/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 style=\"text-align: center;\"><span><div class=\"su-youtube su-u-responsive-media-yes\"><iframe width=\"300\" height=\"200\" src=\"https:\/\/www.youtube.com\/embed\/pS2HSTwHpSw?\" frameborder=\"0\" allowfullscreen allow=\"autoplay; encrypted-media; picture-in-picture\" title=\"\"><\/iframe><\/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><\/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>Courbe contrainte-d\u00e9formation<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/strength\/stress-strain-curve-stress-strain-diagram\/\" 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>R\u00e9sistance ultime \u00e0 la traction &#8211; UTS<\/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,\u00a0R\u00e9sistance ultime \u00e0 la traction &#8211; UTS, 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 r\u00e9sistance ultime \u00e0 la traction - UTS - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"La r\u00e9sistance \u00e0 la traction ultime est le maximum sur la courbe technique de contrainte-d\u00e9formation. 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La r\u00e9sistance \u00e0 la traction ultime est souvent abr\u00e9g\u00e9e en &quot;r\u00e9sistance \u00e0 la traction&quot; ou m\u00eame en &quot;l&#039;ultime&quot;.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/material-properties.org\/fr\/quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition\/\" \/>\n<meta property=\"og:site_name\" content=\"Material Properties\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-24T19:49:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-25T12:47:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/01\/Stress-strain-curve-Strength-of-Materials.png\" \/>\n<meta name=\"author\" content=\"Nick Connor\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/material-properties.org\/fr\/quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition\/\",\"url\":\"https:\/\/material-properties.org\/fr\/quest-ce-que-la-resistance-ultime-a-la-traction-uts-definition\/\",\"name\":\"Qu'est-ce que la r\u00e9sistance ultime \u00e0 la traction - UTS - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles\",\"isPartOf\":{\"@id\":\"https:\/\/material-properties.org\/fr\/#website\"},\"datePublished\":\"2022-05-24T19:49:02+00:00\",\"dateModified\":\"2022-05-25T12:47:38+00:00\",\"author\":{\"@id\":\"https:\/\/material-properties.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"La r\u00e9sistance \u00e0 la traction ultime est le maximum sur la courbe technique de contrainte-d\u00e9formation. 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