{"id":706809,"date":"2024-10-27T04:43:18","date_gmt":"2024-10-27T03:43:18","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=706809"},"modified":"2024-10-27T04:43:18","modified_gmt":"2024-10-27T03:43:18","slug":"phan-tich-ung-suat-nhiet-trong-vat-lieu","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-ung-suat-nhiet-trong-vat-lieu\/","title":{"rendered":"Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u"},"content":{"rendered":"<p class=\"sidekick\">Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u: C\u00e1ch t\u00ednh to\u00e1n v\u00e0 \u0111\u00e1nh gi\u00e1 s\u1ef1 thay \u0111\u1ed5i \u1ee9ng su\u1ea5t khi v\u1eadt li\u1ec7u ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/phan_tich_ung_suat_nhiet_trong_vat_lieu.png\" alt=\"Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong V\u1eadt Li\u1ec7u<\/h2>\n<p>\u1ee8ng su\u1ea5t nhi\u1ec7t l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, xu\u1ea5t hi\u1ec7n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u00e3n n\u1edf ho\u1eb7c co l\u1ea1i c\u1ee7a v\u1eadt li\u1ec7u. S\u1ef1 thay \u0111\u1ed5i n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra \u1ee9ng su\u1ea5t n\u1ed9i sinh, l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh b\u1ec1n v\u1eefng v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc c\u1ee7a c\u1ea5u tr\u00fac v\u1eadt li\u1ec7u.<\/p>\n<ul>\n<li>M\u00f4 h\u00ecnh c\u01a1 b\u1ea3n v\u1ec1 \u1ee9ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>Vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u00e0 t\u00ednh to\u00e1n \u1ee9ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>\u1ee8ng d\u1ee5ng c\u1ee7a ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t<\/li>\n<\/ul>\n<h2>M\u00f4 H\u00ecnh C\u01a1 B\u1ea3n V\u1ec1 \u1ee8ng Su\u1ea5t Nhi\u1ec7t<\/h2>\n<p>\u1ee8ng su\u1ea5t nhi\u1ec7t \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n d\u1ef1a tr\u00ean \u0111\u1ecbnh lu\u1eadt Hook c\u0169ng nh\u01b0 quy t\u1eafc gi\u00e3n n\u1edf nhi\u1ec7t:<\/p>\n<p><em><u>\u03c3<\/u> = E * \u03b1 * \u0394T<\/em><\/p>\n<ul>\n<li>\u03c3: \u1ee8ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>E: M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u1ee7a v\u1eadt li\u1ec7u<\/li>\n<li>\u03b1: H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/li>\n<li>\u0394T: S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/li>\n<\/ul>\n<p>Kh\u00e1i ni\u1ec7m n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng cho nhi\u1ec1u v\u1eadt li\u1ec7u kh\u00e1c nhau. V\u1edbi c\u00e1c v\u1eadt li\u1ec7u c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t kh\u00e1c nhau theo ph\u01b0\u01a1ng d\u00e0i v\u00e0 ph\u01b0\u01a1ng r\u1ed9ng, v\u00ed d\u1ee5 v\u1eadt li\u1ec7u composite, th\u00ec c\u1ea7n t\u00ednh to\u00e1n chi ti\u1ebft h\u01a1n.<\/p>\n<h2>Vi\u1ec7c X\u00e1c \u0110\u1ecbnh V\u00e0 T\u00ednh To\u00e1n \u1ee8ng Su\u1ea5t Nhi\u1ec7t<\/h2>\n<ol>\n<li>X\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u v\u00e0 nhi\u1ec7t \u0111\u1ed9 sau khi thay \u0111\u1ed5i.<\/li>\n<li>T\u00ednh s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 (\u0394T = T<sub>m\u1edbi<\/sub> &#8211; T<sub>c\u0169<\/sub>).<\/li>\n<li>X\u00e1c \u0111\u1ecbnh c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u nh\u01b0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (E) v\u00e0 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t (\u03b1).<\/li>\n<li>\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c \u03c3 = E * \u03b1 * \u0394T \u0111\u1ec3 t\u00ednh \u1ee9ng su\u1ea5t nhi\u1ec7t.<\/li>\n<\/ol>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p, vi\u1ec7c t\u00ednh to\u00e1n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng c\u01a1 h\u1ecdc nh\u01b0 ANSYS ho\u1eb7c Abaqus.<\/p>\n<h2>\u1ee8ng D\u1ee5ng C\u1ee7a Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t<\/h2>\n<p>Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p:<\/p>\n<ul>\n<li><strong>Ng\u00e0nh x\u00e2y d\u1ef1ng<\/strong>: Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u1ea7u, t\u00f2a nh\u00e0 ho\u1eb7c c\u00e1c k\u1ebft c\u1ea5u cao t\u1ea7ng ch\u1ecbu thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li><strong>C\u00f4ng nghi\u1ec7p \u00f4 t\u00f4<\/strong>: Ph\u00e2n t\u00edch \u0111\u1ed9ng c\u01a1, \u1ed1ng x\u1ea3, v\u00e0 c\u00e1c chi ti\u1ebft ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li><strong>Ng\u00e0nh h\u00e0ng kh\u00f4ng<\/strong>: Xem x\u00e9t \u0111\u1ed9 b\u1ec1n c\u1ee7a v\u1eadt li\u1ec7u trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i nhanh ch\u00f3ng v\u00e0 l\u1edbn.<\/li>\n<\/ul>\n<p>\u1ee8ng su\u1ea5t nhi\u1ec7t l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng trong k\u1ef9 thu\u1eadt v\u00e0 v\u1eadt li\u1ec7u, v\u00e0 vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 n\u00f3 gi\u00fap \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 n\u00e2ng cao tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c c\u00f4ng tr\u00ecnh v\u00e0 thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u: C\u00e1ch t\u00ednh to\u00e1n v\u00e0 \u0111\u00e1nh gi\u00e1 s\u1ef1 thay \u0111\u1ed5i \u1ee9ng su\u1ea5t khi v\u1eadt li\u1ec7u ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u<\/title>\n<meta name=\"description\" content=\"Ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t trong v\u1eadt li\u1ec7u: C\u00e1ch t\u00ednh to\u00e1n v\u00e0 \u0111\u00e1nh gi\u00e1 s\u1ef1 thay \u0111\u1ed5i \u1ee9ng su\u1ea5t khi v\u1eadt li\u1ec7u ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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