{"id":116796,"date":"2022-05-24T06:22:19","date_gmt":"2022-05-24T05:22:19","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-lunite-de-tenacite-definition\/"},"modified":"2022-05-25T07:30:02","modified_gmt":"2022-05-25T06:30:02","slug":"quest-ce-que-lunite-de-tenacite-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-lunite-de-tenacite-definition\/","title":{"rendered":"Qu&rsquo;est-ce que l&rsquo;unit\u00e9 de t\u00e9nacit\u00e9 &#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 t\u00e9nacit\u00e9 \u00e0 la traction est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m\u22123) dans le syst\u00e8me SI.\u00a0De m\u00eame que pour la t\u00e9nacit\u00e9 \u00e0 la traction, la t\u00e9nacit\u00e9 \u00e0 l&rsquo;entaille est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m-3).\u00a0Unit\u00e9 d&rsquo;endurance<\/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<p><strong><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Stress-strain-curves-Ductile-vs-Brittle-Material.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-27800\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Stress-strain-curves-Ductile-vs-Brittle-Material-300x273.png\" alt=\"Courbes contrainte-d\u00e9formation - Mat\u00e9riau ductile vs cassant\" width=\"300\" height=\"273\" \/><\/a><span>La t\u00e9nacit\u00e9<\/span><\/strong><span>\u00a0peut \u00eatre d\u00e9finie par rapport aux r\u00e9gions d&rsquo;un\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-stress-strain-curve-stress-strain-diagram-definition\/\"><span>diagramme contrainte-d\u00e9formation<\/span><\/a><span>\u00a0(pour un faible taux de d\u00e9formation).\u00a0<\/span><strong><span>La t\u00e9nacit\u00e9<\/span><\/strong><span>\u00a0est li\u00e9e \u00e0 l&rsquo;\u00a0<\/span><strong><span>aire sous la courbe contrainte-d\u00e9formation<\/span><\/strong><span>.\u00a0La courbe contrainte-d\u00e9formation mesure la t\u00e9nacit\u00e9 sous une charge progressivement croissante.\u00a0La t\u00e9nacit\u00e9 \u00e0 la traction est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m<\/span><sup><span>\u22123<\/span><\/sup><span>) dans le syst\u00e8me SI.\u00a0Pour \u00eatre r\u00e9sistant, un mat\u00e9riau doit \u00eatre \u00e0 la fois\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-is-strength-definition\/\"><strong><span>r\u00e9sistant<\/span><\/strong><\/a><span>\u00a0et\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/ductility\/\"><strong><span>ductile<\/span><\/strong><\/a><span>.\u00a0La figure suivante montre une courbe contrainte-d\u00e9formation typique d&rsquo;un mat\u00e9riau ductile et d&rsquo;un mat\u00e9riau fragile.\u00a0Par exemple, les mat\u00e9riaux fragiles (comme la c\u00e9ramique) qui sont solides mais avec une ductilit\u00e9 limit\u00e9e ne sont pas r\u00e9sistants ;\u00a0\u00e0 l&rsquo;inverse, les mat\u00e9riaux tr\u00e8s ductiles avec de faibles r\u00e9sistances ne sont pas non plus tenaces.\u00a0Pour \u00eatre r\u00e9sistant, un mat\u00e9riau doit r\u00e9sister \u00e0 la fois \u00e0 des contraintes \u00e9lev\u00e9es et \u00e0 des d\u00e9formations \u00e9lev\u00e9es.<\/span><\/p>\n<h2><span>R\u00e9sistance \u00e0 l&rsquo;entaille<\/span><\/h2>\n<p><strong><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/charpy-impact-test-schematic.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-full wp-image-27937\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/charpy-impact-test-schematic.png\" alt=\"Essai de Charpy\" width=\"339\" height=\"395\" \/><\/a><span>La t\u00e9nacit\u00e9 de l&rsquo;entaille<\/span><\/strong><span>\u00a0est la mesure de l&rsquo;\u00e9nergie absorb\u00e9e (\u00e9nergie d&rsquo;impact) lors de la rupture d&rsquo;un sp\u00e9cimen (en pr\u00e9sence d&rsquo;un d\u00e9faut &#8211; g\u00e9n\u00e9ralement une entaille en V) de dimensions et de g\u00e9om\u00e9trie standard lorsqu&rsquo;il est soumis \u00e0 une charge tr\u00e8s rapide (impact).\u00a0Comme mentionn\u00e9 pr\u00e9c\u00e9demment, en pr\u00e9sence d&rsquo;un d\u00e9faut, tel qu&rsquo;une\u00a0<\/span><strong><span>entaille<\/span><\/strong><span>\u00a0ou une\u00a0<\/span><strong><span>fissure<\/span><\/strong><span>, un mat\u00e9riau pr\u00e9sentera probablement un niveau de t\u00e9nacit\u00e9 inf\u00e9rieur.\u00a0Les essais de choc Charpy et Izod permettent de mesurer ce param\u00e8tre important pour \u00e9valuer le comportement de transition ductile \u00e0 fragile d&rsquo;un mat\u00e9riau.\u00a0De m\u00eame que pour la t\u00e9nacit\u00e9 \u00e0 la traction, la t\u00e9nacit\u00e9 \u00e0 l&rsquo;entaille est mesur\u00e9e en unit\u00e9s de\u00a0<\/span><strong><span>joule par m\u00e8tre cube<\/span><\/strong><span> (J\u00b7m<\/span><sup><span>\u22123<\/span><\/sup><span>) dans le syst\u00e8me SI, mais dans ce cas, nous mesurons la surface \u00e0 la position de l&rsquo;entaille.<\/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>Robustesse<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/toughness\/\" 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, <strong>Unit\u00e9 d&rsquo;endurance<\/strong><\/span><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, Unit\u00e9 d&rsquo;endurance, 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 l&#039;unit\u00e9 de t\u00e9nacit\u00e9 - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"La t\u00e9nacit\u00e9 \u00e0 la traction est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m\u22123) dans le syst\u00e8me SI. De m\u00eame que pour la t\u00e9nacit\u00e9 \u00e0 la traction, la t\u00e9nacit\u00e9 \u00e0 l&#039;entaille est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m-3). Unit\u00e9 d&#039;endurance\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/material-properties.org\/fr\/quest-ce-que-lunite-de-tenacite-definition\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce que l&#039;unit\u00e9 de t\u00e9nacit\u00e9 - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles\" \/>\n<meta property=\"og:description\" content=\"La t\u00e9nacit\u00e9 \u00e0 la traction est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m\u22123) dans le syst\u00e8me SI. De m\u00eame que pour la t\u00e9nacit\u00e9 \u00e0 la traction, la t\u00e9nacit\u00e9 \u00e0 l&#039;entaille est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m-3). 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Unit\u00e9 d'endurance","og_url":"https:\/\/material-properties.org\/fr\/quest-ce-que-lunite-de-tenacite-definition\/","og_site_name":"Material Properties","article_published_time":"2022-05-24T05:22:19+00:00","article_modified_time":"2022-05-25T06:30:02+00:00","og_image":[{"url":"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Stress-strain-curves-Ductile-vs-Brittle-Material-300x273.png"}],"author":"Nick Connor","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Nick Connor","Dur\u00e9e de lecture estim\u00e9e":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/material-properties.org\/fr\/quest-ce-que-lunite-de-tenacite-definition\/","url":"https:\/\/material-properties.org\/fr\/quest-ce-que-lunite-de-tenacite-definition\/","name":"Qu'est-ce que l'unit\u00e9 de t\u00e9nacit\u00e9 - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles","isPartOf":{"@id":"https:\/\/material-properties.org\/fr\/#website"},"datePublished":"2022-05-24T05:22:19+00:00","dateModified":"2022-05-25T06:30:02+00:00","author":{"@id":"https:\/\/material-properties.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb"},"description":"La t\u00e9nacit\u00e9 \u00e0 la traction est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m\u22123) dans le syst\u00e8me SI. De m\u00eame que pour la t\u00e9nacit\u00e9 \u00e0 la traction, la t\u00e9nacit\u00e9 \u00e0 l'entaille est mesur\u00e9e en unit\u00e9s de joule par m\u00e8tre cube (J\u00b7m-3). 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