{"id":698461,"date":"2024-11-09T20:05:47","date_gmt":"2024-11-09T19:05:47","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=698461"},"modified":"2024-11-09T20:05:47","modified_gmt":"2024-11-09T19:05:47","slug":"hanh-vi-nhiet-cua-vat-lieu-composite","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/hanh-vi-nhiet-cua-vat-lieu-composite\/","title":{"rendered":"H\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite"},"content":{"rendered":"

H\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch qua c\u00e1c y\u1ebfu t\u1ed1: d\u1eabn nhi\u1ec7t, gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\n

\"H\u00e0nh<\/p>\n

H\u00e0nh Vi Nhi\u1ec7t C\u1ee7a V\u1eadt Li\u1ec7u Composite<\/h2>\n

V\u1eadt li\u1ec7u composite l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a hai hay nhi\u1ec1u v\u1eadt li\u1ec7u kh\u00e1c nhau nh\u1eb1m t\u1ea1o ra m\u1ed9t s\u1ea3n ph\u1ea9m c\u00f3 nh\u1eefng t\u00ednh ch\u1ea5t v\u01b0\u1ee3t tr\u1ed9i h\u01a1n so v\u1edbi t\u1eebng v\u1eadt li\u1ec7u th\u00e0nh ph\u1ea7n ri\u00eang l\u1ebb. Trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, hi\u1ec3u r\u00f5 h\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 k\u1ebft c\u1ea5u.<\/p>\n

C\u1ea5u Tr\u00fac V\u00e0 T\u00ednh Ch\u1ea5t C\u1ee7a V\u1eadt Li\u1ec7u Composite<\/h2>\n

V\u1eadt li\u1ec7u composite bao g\u1ed3m hai th\u00e0nh ph\u1ea7n ch\u00ednh:<\/p>\n

<\/p>\n

  • Ch\u1ea5t n\u1ec1n (matrix): th\u01b0\u1eddng l\u00e0 polymer, kim lo\u1ea1i ho\u1eb7c g\u1ed1m.<\/li>\n
  • V\u1eadt li\u1ec7u gia c\u01b0\u1eddng (reinforcement): c\u00f3 th\u1ec3 l\u00e0 s\u1ee3i th\u1ee7y tinh, s\u1ee3i carbon ho\u1eb7c c\u00e1c lo\u1ea1i h\u1ea1t nano.<\/li>\n

    <\/u1><\/p>\n

    Ch\u1ea5t n\u1ec1n ch\u1ecbu tr\u00e1ch nhi\u1ec7m b\u1ea3o v\u1ec7 v\u1eadt li\u1ec7u gia c\u01b0\u1eddng v\u00e0 truy\u1ec1n t\u1ea3i nhi\u1ec7t, trong khi v\u1eadt li\u1ec7u gia c\u01b0\u1eddng t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a v\u1eadt li\u1ec7u composite.<\/p>\n

    \u0110\u1ed9 D\u1eabn Nhi\u1ec7t<\/h2>\n

    \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea3 ch\u1ea5t n\u1ec1n v\u00e0 v\u1eadt li\u1ec7u gia c\u01b0\u1eddng. \u0110\u1ecbnh l\u00fd Maxwell-Eucken cho ph\u00e9p t\u00ednh to\u00e1n \u0111\u1ed9 d\u1eabn nhi\u1ec7t kc<\/sub><\/em> c\u1ee7a v\u1eadt li\u1ec7u composite:<\/p>\n

    \\[
    \nk_c = k_m \\left( \\frac{1+\\dfrac{2\\phi(k_r – k_m)}{k_r + 2k_m}}{1-\\dfrac{\\phi(k_r – k_m)}{k_r + 2k_m}} \\right)
    \n\\]\n

    Trong \u0111\u00f3:<\/p>\n

    <\/p>\n

  • kc<\/sub><\/em>: \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a composite.<\/li>\n
  • km<\/sub><\/em>: \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a ch\u1ea5t n\u1ec1n.<\/li>\n
  • kr<\/sub><\/em>: \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u gia c\u01b0\u1eddng.<\/li>\n
  • \u03d5<\/em>: T\u1ec9 l\u1ec7 th\u1ec3 t\u00edch c\u1ee7a v\u1eadt li\u1ec7u gia c\u01b0\u1eddng.<\/li>\n

    <\/u1><\/p>\n

    Gi\u00e3n N\u1edf Nhi\u1ec7t<\/h2>\n

    Gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite c\u0169ng l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ea7n xem x\u00e9t. \u0110\u1ed9 gi\u00e3n n\u1edf \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean t\u1ec9 l\u1ec7 th\u1ec3 t\u00edch v\u00e0 t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a t\u1eebng th\u00e0nh ph\u1ea7n:<\/p>\n

    \\[
    \n\\alpha_c = \\phi \\alpha_r + (1 – \\phi) \\alpha_m
    \n\\]\n

    Trong \u0111\u00f3:<\/p>\n

    <\/p>\n

  • \u03b1c<\/sub><\/em>: H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a composite.<\/li>\n
  • \u03b1m<\/sub><\/em>: H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a ch\u1ea5t n\u1ec1n.<\/li>\n
  • \u03b1r<\/sub><\/em>: H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u gia c\u01b0\u1eddng.<\/li>\n
  • \u03d5<\/em>: T\u1ec9 l\u1ec7 th\u1ec3 t\u00edch c\u1ee7a v\u1eadt li\u1ec7u gia c\u01b0\u1eddng.<\/li>\n

    <\/u1><\/p>\n

    Kh\u1ea3 N\u0103ng Ch\u1ecbu Nhi\u1ec7t<\/h2>\n

    Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao, ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o ch\u1ea5t n\u1ec1n. C\u00e1c nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng ch\u1ea5t n\u1ec1n g\u1ed1m (ceramic) th\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n so v\u1edbi ch\u1ea5t n\u1ec1n polymer. Tuy nhi\u00ean, s\u1ef1 k\u1ebft h\u1ee3p ch\u1ea5t n\u1ec1n kim lo\u1ea1i v\u1edbi s\u1ee3i g\u1ed1m ho\u1eb7c s\u1ee3i carbon c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a c\u1ea3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t.<\/p>\n

    \u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n

    V\u1eadt li\u1ec7u composite c\u00f3 h\u00e0nh vi nhi\u1ec7t \u01b0u vi\u1ec7t \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u01b0:<\/p>\n

    <\/p>\n

  • Ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5: l\u00e0m v\u1ecf m\u00e1y bay, t\u00ean l\u1eeda nh\u1edd v\u00e0o \u0111\u1ed9 b\u1ec1n nh\u1eb9 v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao.<\/li>\n
  • Ng\u00e0nh \u00f4 t\u00f4: s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 ph\u1eadn \u0111\u1ed9ng c\u01a1 v\u00e0 h\u1ec7 th\u1ed1ng x\u1ea3 kh\u00ed.<\/li>\n
  • C\u00f4ng nghi\u1ec7p \u0111i\u1ec7n t\u1eed: l\u00e0m v\u1ecf b\u1ea3o v\u1ec7 c\u00e1c linh ki\u1ec7n ch\u1ecbu nhi\u1ec7t cao.<\/li>\n

    <\/u1><\/p>\n

    Hi\u1ec3u r\u00f5 h\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite gi\u00fap c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 hi\u1ec7u su\u1ea5t cao h\u01a1n v\u00e0 tu\u1ed5i th\u1ecd d\u00e0i h\u01a1n, g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng c\u1ee7a nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"

    H\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch qua c\u00e1c y\u1ebfu t\u1ed1: d\u1eabn nhi\u1ec7t, gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/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":"\nH\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite<\/title>\n<meta name=\"description\" content=\"H\u00e0nh vi nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch qua c\u00e1c y\u1ebfu t\u1ed1: d\u1eabn nhi\u1ec7t, gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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