{"id":116852,"date":"2022-05-24T22:56:14","date_gmt":"2022-05-24T21:56:14","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-contrainte-de-cisaillement-materiaux-definition\/"},"modified":"2022-05-26T06:15:51","modified_gmt":"2022-05-26T05:15:51","slug":"quest-ce-que-la-contrainte-de-cisaillement-materiaux-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-contrainte-de-cisaillement-materiaux-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la contrainte de cisaillement &#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\">La contrainte de cisaillement existe lorsque deux parties d&rsquo;un mat\u00e9riau ont tendance \u00e0 glisser l&rsquo;une sur l&rsquo;autre dans n&rsquo;importe quel plan de cisaillement typique lors de l&rsquo;application d&rsquo;une force parall\u00e8le \u00e0 ce plan.<\/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>\u00a0) 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><span>.<\/span><\/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 de cisaillement<\/span><\/h3>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/shear-stress-figure.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-full wp-image-27810\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/shear-stress-figure.png\" alt=\"contrainte de cisaillement\" width=\"132\" height=\"271\" \/><\/a><span>Du point de vue interne, l&rsquo;intensit\u00e9 de la contrainte dans le corps d&rsquo;un composant est exprim\u00e9e comme l&rsquo;un des trois types de charge interne de base, \u00e0 savoir la\u00a0<\/span><strong><span>traction, la compression et le cisaillement<\/span><\/strong><span>.\u00a0Dans la pratique de l&rsquo;ing\u00e9nierie, de nombreuses charges sont de torsion plut\u00f4t que de cisaillement pur.\u00a0Math\u00e9matiquement, il n&rsquo;y a que deux types de charge interne car les contraintes de traction et de compression peuvent \u00eatre consid\u00e9r\u00e9es comme les versions positives et n\u00e9gatives du m\u00eame type de charge normale.<\/span><b><\/b><\/p>\n<p><b><span>La contrainte de cisaillement<\/span><\/b><span>\u00a0existe lorsque deux parties d&rsquo;un mat\u00e9riau ont tendance \u00e0 glisser l&rsquo;une sur l&rsquo;autre dans n&rsquo;importe quel plan de cisaillement typique lors de l&rsquo;application d&rsquo;une force parall\u00e8le \u00e0 ce plan.\u00a0La torsion est une variation du cisaillement pur dans laquelle un \u00e9l\u00e9ment structurel est tordu.\u00a0Les forces de torsion produisent un mouvement de rotation autour de l&rsquo;axe longitudinal d&rsquo;une extr\u00e9mit\u00e9 de l&rsquo;\u00e9l\u00e9ment par rapport \u00e0 l&rsquo;autre extr\u00e9mit\u00e9.\u00a0La contrainte de cisaillement est \u00e9galement d&rsquo;une grande importance dans la nature, \u00e9tant intimement li\u00e9e au mouvement descendant des mat\u00e9riaux terrestres (comme dans le cas des avalanches).<\/span><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/shear-stress-equation.png\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-27812 aligncenter\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/shear-stress-equation.png\" alt=\"contrainte de cisaillement - \u00e9quation\" width=\"270\" height=\"169\" \/><\/a><\/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>Shear Stress &#8211; Materials<\/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,\u00a0Shear Stress &#8211; Materials, 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 - 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