{"id":1180,"date":"2026-03-26T03:26:01","date_gmt":"2026-03-26T03:26:01","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=method&p=1180"},"modified":"2026-03-26T07:15:34","modified_gmt":"2026-03-26T07:15:34","slug":"plastic-tensile-strength-test","status":"publish","type":"method","link":"https:\/\/www.packtests.com\/vi\/method\/plastic-tensile-strength-test\/","title":{"rendered":"Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a"},"content":{"rendered":"

C\u00e1i Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong> l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u nh\u1ef1a, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 t\u00ednh ph\u00f9 h\u1ee3p c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u0111\u00f3ng g\u00f3i, thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t \u00f4 t\u00f4 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 h\u00e0nh vi c\u1ee7a nh\u1ef1a khi ch\u1ecbu t\u1ea3i. B\u1eb1ng c\u00e1ch \u0111o l\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong>, \u0111\u1ed9 gi\u00e3n d\u00e0i v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh.<\/p>\n\n\n\n

Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh ch\u00ednh c\u1ee7a Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong>, bao g\u1ed3m t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3, c\u00e1ch th\u1ee9c th\u1ef1c hi\u1ec7n v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan nh\u01b0 ASTM D882<\/strong> v\u00e0 ISO 527<\/strong>. Ch\u00fang ta c\u0169ng s\u1ebd th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1ch b\u00e0i ki\u1ec3m tra n\u00e0y \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i<\/strong> \u0111\u1ec3 gi\u00fap ng\u01b0\u1eddi \u0111\u1ecdc hi\u1ec3u r\u00f5 to\u00e0n di\u1ec7n v\u1ec1 t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n\n\n\n

Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n

A Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong> \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 l\u1ef1c m\u00e0 v\u1eadt li\u1ec7u nh\u1ef1a c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c tr\u01b0\u1edbc khi b\u1ecb g\u00e3y ho\u1eb7c bi\u1ebfn d\u1ea1ng. Th\u1eed nghi\u1ec7m n\u00e0y bao g\u1ed3m vi\u1ec7c t\u00e1c d\u1ee5ng m\u1ed9t l\u1ef1c k\u00e9o c\u00f3 ki\u1ec3m so\u00e1t l\u00ean m\u1eabu th\u1eed cho \u0111\u1ebfn khi m\u1eabu b\u1ecb g\u00e3y ho\u1eb7c \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n bi\u1ebfn d\u1ea1ng t\u1ed1i \u0111a. Th\u1eed nghi\u1ec7m n\u00e0y \u0111o l\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00e9o gi\u00e3n c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 gi\u00fap x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc c\u0169ng nh\u01b0 \u0111\u1ed9 \u0111\u00e0n h\u1ed3i c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n\n\n\n

Trong l\u0129nh v\u1ef1c bao b\u00ec, s\u1ea3n ph\u1ea9m y t\u1ebf v\u00e0 nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> Vi\u1ec7c nghi\u00ean c\u1ee9u c\u00e1c lo\u1ea1i nh\u1ef1a l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ch\u1ecbu \u1ee9ng su\u1ea5t v\u00e0 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. B\u1eb1ng c\u00e1ch n\u1eafm r\u00f5 \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong>, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n\n\n\n

ASTM D882: Ph\u01b0\u01a1ng ph\u00e1p th\u1eed ti\u00eau chu\u1ea9n \u0111\u1ed1i v\u1edbi t\u1ea5m nh\u1ef1a m\u1ecfng<\/strong><\/h2>\n\n\n\n

C\u00e1i ASTM D882<\/strong> Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0a ra c\u00e1c h\u01b0\u1edbng d\u1eabn \u0111\u1ec3 ki\u1ec3m tra t\u00ednh ch\u1ea5t ch\u1ecbu k\u00e9o c\u1ee7a t\u1ea5m nh\u1ef1a m\u1ecfng<\/strong>. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 c\u00e1c v\u1eadt li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong bao b\u00ec d\u1ebbo, m\u00e0ng nh\u1ef1a v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a m\u1ecfng kh\u00e1c. Theo ASTM D882<\/strong>, ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m n\u00e0y bao g\u1ed3m vi\u1ec7c \u0111\u1eb7t m\u1ed9t m\u1eabu th\u1eed c\u00f3 ti\u1ebft di\u1ec7n \u0111\u1ed3ng nh\u1ea5t v\u00e0o m\u00e1y th\u1eed c\u01a1 h\u1ecdc. Sau \u0111\u00f3, l\u1ef1c v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i \u0111\u01b0\u1ee3c ghi l\u1ea1i trong qu\u00e1 tr\u00ecnh m\u1eabu th\u1eed b\u1ecb k\u00e9o gi\u00e3n.<\/p>\n\n\n\n

ASTM D882<\/strong> n\u00eau t\u00f3m t\u1eaft quy tr\u00ecnh \u0111o l\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong>, \u0111\u1ed9 gi\u00e3n d\u00e0i khi \u0111\u1ee9t v\u00e0 m\u00f4-\u0111un \u0111\u00e0n h\u1ed3i. Th\u1eed nghi\u1ec7m n\u00e0y c\u0169ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c k\u1ef9 thu\u1eadt k\u1eb9p m\u1eabu v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i kh\u00e1c nhau nh\u1eb1m \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c v\u00e0 nh\u1ea5t qu\u00e1n c\u1ee7a k\u1ebft qu\u1ea3.<\/p>\n\n\n\n

\u0110\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c, vi\u1ec7c ki\u1ec3m so\u00e1t c\u00e1c bi\u1ebfn s\u1ed1 nh\u01b0 t\u1ed1c \u0111\u1ed9 th\u1eed nghi\u1ec7m, ph\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb m\u1eabu th\u1eed v\u00e0 lo\u1ea1i k\u1eb9p th\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Ti\u00eau chu\u1ea9n n\u00e0y cung c\u1ea5p d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1eadt li\u1ec7u, nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n, c\u0169ng nh\u01b0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n\n\n\n

ISO 527: Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u nh\u1ef1a<\/strong><\/h2>\n\n\n\n

C\u00e1i ISO 527<\/strong> Ti\u00eau chu\u1ea9n n\u00e0y t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u1ec1 \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> c\u1ee7a nh\u1ef1a v\u00e0 v\u1eadt li\u1ec7u composite nh\u1ef1a trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n quy \u0111\u1ecbnh. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho m\u1ed9t lo\u1ea1t c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u, bao g\u1ed3m nh\u1ef1a nhi\u1ec7t d\u1ebbo, nh\u1ef1a nhi\u1ec7t r\u1eafn v\u00e0 v\u1eadt li\u1ec7u composite gia c\u01b0\u1eddng s\u1ee3i. Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0a ra c\u00e1c h\u01b0\u1edbng d\u1eabn v\u1ec1 vi\u1ec7c chu\u1ea9n b\u1ecb m\u1eabu th\u1eed, l\u1ef1a ch\u1ecdn \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m v\u00e0 gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m.<\/p>\n\n\n\n

ISO 527<\/strong> \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch \u0111\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u s\u1ebd ph\u1ea3i ch\u1ecbu \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh \u1ee9ng d\u1ee5ng. Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh quy tr\u00ecnh th\u1ef1c hi\u1ec7n c\u00e1c th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong>, bao g\u1ed3m vi\u1ec7c \u0111o l\u01b0\u1eddng m\u00f4-\u0111un \u0111\u00e0n h\u1ed3i<\/strong> v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i. Nh\u1eefng t\u00ednh ch\u1ea5t n\u00e0y c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1ch th\u1ee9c nh\u1ef1a s\u1ebd ph\u1ea3n \u1ee9ng d\u01b0\u1edbi c\u00e1c t\u1ea3i tr\u1ecdng v\u00e0 \u1ee9ng su\u1ea5t kh\u00e1c nhau.<\/p>\n\n\n\n

B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ISO 527<\/strong>, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 thu th\u1eadp \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u ch\u00ednh x\u00e1c v\u00e0 c\u00f3 th\u1ec3 so s\u00e1nh \u0111\u01b0\u1ee3c v\u1ec1 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u nh\u1ef1a kh\u00e1c nhau, t\u1eeb \u0111\u00f3 gi\u00fap vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p nh\u1ea5t cho s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh c\u1ee7a th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o nh\u1ef1a<\/strong><\/h2>\n\n\n\n

Trong qu\u00e1 tr\u00ecnh n\u00e0y, ng\u01b0\u1eddi ta xem x\u00e9t m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 quan tr\u1ecdng, bao g\u1ed3m Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c v\u00e0 nh\u1ea5t qu\u00e1n:<\/p>\n\n\n\n

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  1. \u0110\u1ed9 b\u1ec1n k\u00e9o<\/strong>: \u0110\u00e2y l\u00e0 l\u1ef1c t\u1ed1i \u0111a m\u00e0 v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c khi b\u1ecb k\u00e9o gi\u00e3n tr\u01b0\u1edbc khi b\u1ecb \u0111\u1ee9t. \u0110\u00e2y l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1 quan tr\u1ecdng \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a v\u1eadt li\u1ec7u khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u1ee9ng su\u1ea5t.<\/li>\n\n\n\n
  2. \u0110\u1ed9 gi\u00e3n d\u00e0i<\/strong>: T\u00ednh ch\u1ea5t n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn kh\u1ea3 n\u0103ng co gi\u00e3n c\u1ee7a nh\u1ef1a tr\u01b0\u1edbc khi b\u1ecb \u0111\u1ee9t. N\u00f3 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m t\u0103ng chi\u1ec1u d\u00e0i c\u1ee7a v\u1eadt li\u1ec7u khi ch\u1ecbu l\u1ef1c. \u0110\u1ed9 gi\u00e3n d\u00e0i l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u1ebbo dai c\u1ee7a v\u1eadt li\u1ec7u c\u0169ng nh\u01b0 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 va \u0111\u1eadp ho\u1eb7c bi\u1ebfn d\u1ea1ng c\u1ee7a n\u00f3.<\/li>\n\n\n\n
  3. H\u1ec7 s\u1ed1 \u0111\u00e0n h\u1ed3i<\/strong>: C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00f4-\u0111un \u0111\u00e0n h\u1ed3i<\/strong>, \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0y d\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u1eadt li\u1ec7u. N\u00f3 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c hi\u1ec3u c\u00e1ch v\u1eadt li\u1ec7u s\u1ebd bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a t\u1ea3i tr\u1ecdng v\u00e0 li\u1ec7u v\u1eadt li\u1ec7u c\u00f3 tr\u1edf l\u1ea1i h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u sau khi t\u1ea3i tr\u1ecdng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf hay kh\u00f4ng.<\/li>\n\n\n\n
  4. S\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong quy tr\u00ecnh<\/strong>: \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n, vi\u1ec7c ki\u1ec3m so\u00e1t c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 chu\u1ea9n b\u1ecb m\u1eabu th\u1eed, kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c k\u1eb9p v\u00e0 t\u1ed1c \u0111\u1ed9 th\u1eed nghi\u1ec7m l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. S\u1ef1 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c, do \u0111\u00f3 vi\u1ec7c tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 ASTM D882<\/strong> v\u00e0 ISO 527<\/strong>.<\/li>\n<\/ol>\n\n\n\n

    Th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong><\/h2>\n\n\n\n

    \u0110\u1ec3 th\u1ef1c hi\u1ec7n Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong>, m\u1eabu th\u1eed \u0111\u01b0\u1ee3c c\u1eaft theo k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n, th\u01b0\u1eddng c\u00f3 t\u1ef7 l\u1ec7 chi\u1ec1u r\u1ed9ng tr\u00ean \u0111\u1ed9 d\u00e0y \u00edt nh\u1ea5t l\u00e0 8:1. Sau \u0111\u00f3, m\u1eabu th\u1eed \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o m\u00e1y th\u1eed nghi\u1ec7m v\u00e0 l\u1ef1c \u0111\u01b0\u1ee3c t\u00e1c d\u1ee5ng cho \u0111\u1ebfn khi v\u1eadt li\u1ec7u b\u1ecb \u0111\u1ee9t. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, m\u00e1y ghi l\u1ea1i m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i, t\u1ea1o ra \u0111\u01b0\u1eddng cong l\u1ef1c-\u0111\u1ed9 gi\u00e3n d\u00e0i, t\u1eeb \u0111\u00f3 cho ph\u00e9p t\u00ednh to\u00e1n \u0111\u1ed9 b\u1ec1n k\u00e9o, \u0111\u1ed9 gi\u00e3n d\u00e0i khi \u0111\u1ee9t v\u00e0 m\u00f4-\u0111un \u0111\u00e0n h\u1ed3i.<\/p>\n\n\n\n

    M\u00e1y \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i<\/strong> c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u c\u00f3 t\u1ed1c \u0111\u1ed9 gi\u00e3n d\u00e0i cao. K\u1ebft qu\u1ea3 t\u1eeb th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh li\u1ec7u v\u1eadt li\u1ec7u \u0111\u00f3 c\u00f3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u00e0 c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn hay kh\u00f4ng.<\/p>\n\n\n\n

    K\u1ebft lu\u1eadn: T\u1ea1i sao vi\u1ec7c th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a l\u1ea1i quan tr\u1ecdng<\/strong><\/h2>\n\n\n\n

    C\u00e1i Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a<\/strong> l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u nh\u1ef1a. B\u1eb1ng c\u00e1ch \u0111o \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong>, \u0111\u1ed9 gi\u00e3n d\u00e0i<\/strong>, v\u00e0 h\u1ec7 s\u1ed1 \u0111\u00e0n h\u1ed3i<\/strong>, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a c\u1ee7a h\u1ecd s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang nh\u01b0 mong \u0111\u1ee3i trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf. C\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 ASTM D882<\/strong> v\u00e0 ISO 527<\/strong> cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 d\u1ebbo dai v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a v\u1eadt li\u1ec7u nh\u1ef1a.<\/p>\n\n\n\n

    \u0110\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p c\u00f3 nhu c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u nh\u1ef1a ch\u1ea5t l\u01b0\u1ee3ng cao, vi\u1ec7c \u0111\u1ea7u t\u01b0 v\u00e0o c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> \u0111i\u1ec1u n\u00e0y c\u00f3 vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a s\u1ea3n ph\u1ea9m. T\u1ea1i Cell Instruments, ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p ti\u00ean ti\u1ebfn m\u00e1y th\u1eed \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong> \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u00e0 mang l\u1ea1i k\u1ebft qu\u1ea3 \u0111\u00e1ng tin c\u1eady, c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n

    <\/p>","protected":false},"excerpt":{"rendered":"

    Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a nh\u1ef1a l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u nh\u1ef1a, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 t\u00ednh ph\u00f9 h\u1ee3p c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u0111\u00f3ng g\u00f3i, thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t \u00f4 t\u00f4 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 h\u00e0nh vi c\u1ee7a nh\u1ef1a khi ch\u1ecbu t\u1ea3i. B\u1eb1ng c\u00e1ch \u0111o \u0111\u1ed9 b\u1ec1n k\u00e9o, \u0111\u1ed9 gi\u00e3n d\u00e0i v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc kh\u00e1c [\u2026]<\/p>","protected":false},"featured_media":1181,"parent":0,"template":"","meta":{"_acf_changed":true},"class_list":["post-1180","method","type-method","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/method\/1180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/method"}],"about":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/types\/method"}],"version-history":[{"count":0,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/method\/1180\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/media\/1181"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/media?parent=1180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}