{"id":693753,"date":"2024-09-23T22:22:32","date_gmt":"2024-09-23T21:22:32","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=693753"},"modified":"2024-09-23T22:22:32","modified_gmt":"2024-09-23T21:22:32","slug":"anh-huong-cua-nhiet-do-len-keo-dan-ket-cau","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/anh-huong-cua-nhiet-do-len-keo-dan-ket-cau\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u"},"content":{"rendered":"<p class=\"sidekick\">\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u: C\u00e1ch nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c lo\u1ea1i keo d\u00e1n s\u1eed d\u1ee5ng trong k\u1ef9 thu\u1eadt k\u1ebft c\u1ea5u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/anh_huong_cua_nhiet_do_len_keo_dan_ket_cau.png\" alt=\"\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u<\/h2>\n<p>\nKeo d\u00e1n k\u1ebft c\u1ea5u l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng nghi\u1ec7p. Tuy nhi\u00ean, nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a keo d\u00e1n. Hi\u1ec3u r\u00f5 t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n gi\u00fap c\u00e1c k\u1ef9 s\u01b0 l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng keo d\u00e1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.\n<\/p>\n<h2>1. T\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/h2>\n<ul>\n<li><b>\u0110\u1ed9 c\u1ee9ng<\/b>: \u1ede nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, keo d\u00e1n th\u01b0\u1eddng tr\u1edf n\u00ean c\u1ee9ng v\u00e0 d\u1ec5 g\u00e3y h\u01a1n. \u0110i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c v\u00e0 b\u00e1m d\u00ednh c\u1ee7a keo.<\/li>\n<li><b>\u0110\u1ed9 co gi\u00e3n<\/b>: Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p l\u00e0m gi\u1ea3m \u0111\u1ed9 co gi\u00e3n c\u1ee7a keo, d\u1eabn \u0111\u1ebfn nguy c\u01a1 n\u1ee9t g\u00e3y khi c\u00f3 l\u1ef1c t\u00e1c \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h2>2. T\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<ul>\n<li><b>Ch\u1ea3y m\u1ec1m<\/b>: Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, keo d\u00e1n c\u00f3 th\u1ec3 ch\u1ea3y m\u1ec1m, m\u1ea5t h\u00ecnh d\u1ea1ng v\u00e0 kh\u1ea3 n\u0103ng k\u1ebft d\u00ednh. \u0110i\u1ec1u n\u00e0y r\u00f5 r\u1ec7t h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i keo d\u00e1n nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li><b>Bi\u1ebfn ch\u1ea5t<\/b>: Nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i c\u1ea5u tr\u00fac h\u00f3a h\u1ecdc c\u1ee7a keo d\u00e1n, l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng b\u00e1m d\u00ednh v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc.<\/li>\n<\/ul>\n<h2>3. Nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1ee9ng su\u1ea5t nhi\u1ec7t<\/h2>\n<p>\nS\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 g\u00e2y ra \u1ee9ng su\u1ea5t nhi\u1ec7t trong keo d\u00e1n v\u00e0 c\u00e1c b\u1ec1 m\u1eb7t d\u00e1n. C\u01a1 ch\u1ebf n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh sau:\n<\/p>\n<p>\n\\( \\sigma = \\alpha \\cdot E \\cdot \\Delta T \\)\n<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>\\( \\sigma \\): \u1ee8ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>\\( \\alpha \\): H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a keo d\u00e1n<\/li>\n<li>\\( E \\): M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/li>\n<li>\\( \\Delta T \\): S\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9<\/li>\n<\/ul>\n<p>\n\u1ee8ng su\u1ea5t nhi\u1ec7t n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u00e1m d\u00ednh ho\u1eb7c g\u00e2y ra n\u1ee9t g\u00e3y trong keo d\u00e1n v\u00e0 c\u00e1c v\u1eadt li\u1ec7u li\u00ean quan.\n<\/p>\n<h2>4. Ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1 t\u00ednh n\u0103ng keo d\u00e1n<\/h2>\n<ul>\n<li><b>Ki\u1ec3m tra \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/b>: C\u00e1c b\u00e0i ki\u1ec3m tra bao g\u1ed3m th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 c\u1ee9ng \u1edf nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi \u0111i\u1ec3m \u0111\u00f3ng b\u0103ng.<\/li>\n<li><b>Ki\u1ec3m tra \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/b>: Ki\u1ec3m tra t\u00ednh ch\u1ea5t c\u1ee7a keo \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n ambient \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 s\u1ef1 m\u1ec1m d\u1ebbo v\u00e0 \u0111\u1ed9 b\u00e1m d\u00ednh.<\/li>\n<\/ul>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>\nHi\u1ec3u r\u00f5 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft trong thi\u1ebft k\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. Vi\u1ec7c n\u00e0y gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c c\u00f4ng tr\u00ecnh k\u1ef9 thu\u1eadt trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, t\u1eeb m\u00f4i tr\u01b0\u1eddng l\u1ea1nh gi\u00e1 \u0111\u1ebfn n\u00f3ng b\u1ee9c.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean keo d\u00e1n k\u1ebft c\u1ea5u: C\u00e1ch nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c lo\u1ea1i keo d\u00e1n s\u1eed d\u1ee5ng trong k\u1ef9 thu\u1eadt k\u1ebft c\u1ea5u.<\/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 - 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