{"id":19893,"date":"2020-06-20T01:52:00","date_gmt":"2020-06-20T01:52:00","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=19893"},"modified":"2020-06-20T01:53:32","modified_gmt":"2020-06-20T01:53:32","slug":"how-to-comprehend-strength-in-mechanics","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/cach-hieu-suc-manh-trong-co-che\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ee9c m\u1ea1nh trong c\u01a1 h\u1ecdc"},"content":{"rendered":"

1 \u3001 S\u1ee9c m\u1ea1nh<\/p>

\u0110\u1ecbnh ngh\u0129a: kh\u1ea3 n\u0103ng c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn ho\u1eb7c b\u1ed9 ph\u1eadn ch\u1ed1ng l\u1ea1i h\u01b0 h\u1ecfng (g\u00e3y) ho\u1eb7c bi\u1ebfn d\u1ea1ng \u0111\u00e1ng k\u1ec3 d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng ngo\u1ea1i l\u1ef1c. C\u00e1c t\u1eeb kh\u00f3a \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t, \u0111\u1ee9t g\u00e3y v\u00e0 bi\u1ebfn d\u1ea1ng \u0111\u00e1ng k\u1ec3.<\/p>

V\u00ed d\u1ee5, Sun Yue l\u1ea5y iPad l\u00e0m c\u00e2n, \u0111\u1ee9ng l\u00ean th\u00ec m\u00e0n h\u00ecnh iPad b\u1ecb n\u1ee9t, t\u1ee9c l\u00e0 kh\u00f4ng \u0111\u1ee7 m\u1ea1nh. V\u00ed d\u1ee5, nhi\u1ec1u c\u00e0nh c\u00e2y l\u1edbn b\u1ecb gi\u00f3 l\u00e0m g\u00e3y khi ng\u1eafm bi\u1ec3n v\u00e0o m\u1ed7i m\u00f9a h\u00e8 \u1edf V\u0169 H\u00e1n, kh\u00f4ng \u0111\u1ee7 m\u1ea1nh.<\/p>

C\u01b0\u1eddng \u0111\u1ed9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 ph\u1ea3n \u00e1nh s\u1ef1 h\u01b0 h\u1ecfng c\u1ee7a v\u1eadt li\u1ec7u nh\u01b0 \u0111\u1ee9t g\u00e3y. N\u00f3i chung, c\u01b0\u1eddng \u0111\u1ed9 bao g\u1ed3m c\u01b0\u1eddng \u0111\u1ed9 k\u00e9o v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n, l\u00e0 l\u01b0\u1ee3ng v\u1eadt li\u1ec7u b\u1ecb ph\u00e1 h\u1ee7y khi \u1ee9ng su\u1ea5t \u0111\u1ea1t t\u1edbi. \u0110\u01a1n v\u1ecb \u0111o s\u1ee9c m\u1ea1nh th\u01b0\u1eddng l\u00e0 MPa.<\/p>

\"\"<\/figure>

Lo\u1ea1i thi\u1ec7t h\u1ea1i<\/p>

G\u00e3y gi\u00f2n: g\u00e3y \u0111\u1ed9t ng\u1ed9t x\u1ea3y ra m\u00e0 kh\u00f4ng c\u00f3 bi\u1ebfn d\u1ea1ng d\u1ebbo \u0111\u00e1ng k\u1ec3. V\u00ed d\u1ee5: v\u1ebft g\u00e3y c\u1ee7a m\u1eabu gang d\u1ecdc theo m\u1eb7t c\u1eaft ngang trong qu\u00e1 tr\u00ecnh k\u00e9o v\u00e0 g\u00e3y m\u1eabu b\u1eb1ng gang d\u1ecdc theo m\u1eb7t c\u1eaft nghi\u00eang trong qu\u00e1 tr\u00ecnh xo\u1eafn.<\/p>

N\u0103ng su\u1ea5t d\u1ebbo: v\u1eadt li\u1ec7u t\u1ea1o ra bi\u1ebfn d\u1ea1ng d\u1ebbo \u0111\u00e1ng k\u1ec3 l\u00e0m cho c\u1ea5u ki\u1ec7n m\u1ea5t kh\u1ea3 n\u0103ng l\u00e0m vi\u1ec7c. V\u00ed d\u1ee5, m\u1eabu th\u00e9p cacbon th\u1ea5p s\u1ebd c\u00f3 bi\u1ebfn d\u1ea1ng d\u1ebbo \u0111\u00e1ng k\u1ec3 khi n\u00f3 b\u1ecb k\u00e9o c\u0103ng ho\u1eb7c xo\u1eafn.<\/p>

l\u00fd thuy\u1ebft s\u1ee9c m\u1ea1nh<\/p>

1. L\u00fd thuy\u1ebft v\u1ec1 \u1ee9ng su\u1ea5t k\u00e9o l\u1edbn nh\u1ea5t:<\/p>

Mi\u1ec5n l\u00e0 \u1ee9ng su\u1ea5t k\u00e9o l\u1edbn nh\u1ea5t t\u1ea1i m\u1ed9t \u0111i\u1ec3m trong c\u1ea5u ki\u1ec7n \u0111\u1ea1t \u0111\u1ebfn \u1ee9ng su\u1ea5t cu\u1ed1i \u03c3b trong \u0111i\u1ec1u ki\u1ec7n \u1ee9ng su\u1ea5t m\u1ed9t chi\u1ec1u, th\u00ec v\u1eadt li\u1ec7u s\u1ebd x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1ee9t gi\u00f2n. Do \u0111\u00f3, \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 x\u1ea3y ra \u0111\u1ee9t g\u00e3y gi\u00f2n c\u1ee7a c\u1ea5u ki\u1ec7n \u1edf tr\u1ea1ng th\u00e1i \u1ee9ng su\u1ea5t ph\u1ee9c t\u1ea1p nh\u01b0 sau: \u03c31 = \u03c3b<\/p>

V\u00ec v\u1eady, \u0111i\u1ec1u ki\u1ec7n c\u01b0\u1eddng \u0111\u1ed9 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1edfi l\u00fd thuy\u1ebft c\u01b0\u1eddng \u0111\u1ed9 \u0111\u1ea7u ti\u00ean l\u00e0 \uff1a \u03c31\u2264 [\u03c3]\u3002<\/p>

2. L\u00fd thuy\u1ebft bi\u1ebfn d\u1ea1ng k\u00e9o c\u1ef1c \u0111\u1ea1i:<\/p>

Ch\u1ec9 c\u1ea7n bi\u1ebfn d\u1ea1ng k\u00e9o l\u1edbn nh\u1ea5t \u03b5 1 \u0111\u1ea1t \u0111\u1ebfn gi\u00e1 tr\u1ecb gi\u1edbi h\u1ea1n \u03b5 u \u1edf tr\u1ea1ng th\u00e1i \u1ee9ng su\u1ea5t m\u1ed9t chi\u1ec1u s\u1ebd x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1ee9t gi\u00f2n: \u03b51 = \u03c3u.<\/p>

From the generalized Hooke’s Law:\u03b51=[\u03c31-u(\u03c32+\u03c33)]\/E\uff0ctherefore,\u03c31-u(\u03c32+\u03c33)=\u03c3b.<\/p>

C\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u01b0\u1eddng \u0111\u1ed9 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp theo l\u00fd thuy\u1ebft c\u01b0\u1eddng \u0111\u1ed9 th\u1ee9 hai nh\u01b0 sau: \u03c31-u (\u03c32 + \u03c33) \u2264 [\u03c3].<\/p>

3. L\u00fd thuy\u1ebft \u1ee9ng su\u1ea5t c\u1eaft c\u1ef1c \u0111\u1ea1i:<\/p>

Mi\u1ec5n l\u00e0 \u1ee9ng su\u1ea5t c\u1eaft l\u1edbn nh\u1ea5t \u03c4 Max \u0111\u1ea1t t\u1edbi \u1ee9ng su\u1ea5t c\u1eaft cu\u1ed1i c\u00f9ng \u03c4 0 \u1edf tr\u1ea1ng th\u00e1i \u1ee9ng su\u1ea5t m\u1ed9t chi\u1ec1u, v\u1eadt li\u1ec7u s\u1ebd b\u1ecb h\u1ecfng. \u03c4max = \u03c40\u3002<\/p>

Theo c\u00f4ng th\u1ee9c \u1ee9ng su\u1ea5t tr\u00ean ti\u1ebft di\u1ec7n nghi\u00eang c\u1ee7a l\u1ef1c c\u0103ng d\u1ecdc tr\u1ee5c.\u03c40 = \u03c3s \/ 2 \uff08\u03c3s \u2014\u2014 \u1ee8ng su\u1ea5t ph\u00e1p tuy\u1ebfn tr\u00ean m\u1eb7t c\u1eaft\uff09 T\u1eeb c\u00f4ng th\u1ee9c: \u03c4max = \uff08\u03c31-\u03c33\uff09 \/2\u3002 V\u1eady \u0111i\u1ec1u ki\u1ec7n ph\u00e1 h\u1ee7y \u0111\u01b0\u1ee3c vi\u1ebft l\u1ea1i l\u00e0 \u03c31 -\u03c33 = \u03c3s\u3002<\/p>

Theo l\u00fd thuy\u1ebft \u0111\u1ed9 b\u1ec1n th\u1ee9 ba, \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 b\u1ec1n l\u00e0 \uff1a \u03c31-\u03c33\u2264 [\u03c3]\u3002<\/p>

4. Thuy\u1ebft n\u0103ng l\u01b0\u1ee3ng c\u1ee5 th\u1ec3 c\u1ee7a s\u1ef1 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng:<\/p>

Mi\u1ec5n l\u00e0 t\u1ef7 l\u1ec7 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng t\u1ea1i m\u1ed9t \u0111i\u1ec3m trong c\u1ea5u ki\u1ec7n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn gi\u00e1 tr\u1ecb gi\u1edbi h\u1ea1n \u1edf tr\u1ea1ng th\u00e1i \u1ee9ng su\u1ea5t m\u1ed9t chi\u1ec1u, v\u1eadt li\u1ec7u s\u1ebd b\u1ecb h\u1ecfng.<\/p>

Do \u0111\u00f3, theo l\u00fd thuy\u1ebft s\u1ee9c m\u1ea1nh th\u1ee9 t\u01b0, c\u00e1c \u0111i\u1ec1u ki\u1ec7n s\u1ee9c m\u1ea1nh l\u00e0:<\/p>

sqrt (\u03c31 ^ 2 + \u03c32 ^ 2 + \u03c33 ^ 2-\u03c31\u03c32-\u03c32\u03c33-\u03c33\u03c31) <[\u03c3]\u3002<\/p>

2 \u3001 \u0110\u1ed9 c\u1ee9ng<\/p>

\u0110\u1ecbnh ngh\u0129a: d\u00f9ng \u0111\u1ec3 ch\u1ec9 kh\u1ea3 n\u0103ng c\u1ee7a c\u00e1c c\u1ea5u ki\u1ec7n ho\u1eb7c b\u1ed9 ph\u1eadn ch\u1ed1ng l\u1ea1i s\u1ef1 bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i ho\u1eb7c chuy\u1ec3n v\u1ecb d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a ngo\u1ea1i l\u1ef1c, t\u1ee9c l\u00e0 \u0111\u1ed9 bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i ho\u1eb7c t\u00ednh duy nh\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi cho ph\u00e9p c\u1ee7a c\u00f4ng tr\u00ecnh.<\/p>

\u0110\u1ed9 c\u1ee9ng l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 ph\u1ea3n \u00e1nh m\u1ed1i quan h\u1ec7 gi\u1eefa bi\u1ebfn d\u1ea1ng k\u1ebft c\u1ea5u v\u00e0 l\u1ef1c, t\u1ee9c l\u00e0 l\u01b0\u1ee3ng bi\u1ebfn d\u1ea1ng sinh ra b\u1edfi bao nhi\u00eau l\u1ef1c m\u00e0 k\u1ebft c\u1ea5u ph\u1ea3i ch\u1ecbu. T\u00f3m l\u1ea1i, n\u00f3 l\u00e0 m\u1ed9t l\u00f2 xo, v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a l\u00f2 xo l\u00e0 l\u1ef1c c\u0103ng chia cho \u0111\u1ed9 gi\u00e3n d\u00e0i. \u0110\u01a1n v\u1ecb c\u1ee7a \u0111\u1ed9 c\u1ee9ng th\u01b0\u1eddng l\u00e0 N \/ m\u3002<\/p>

Lo\u1ea1i \u0111\u1ed9 c\u1ee9ng:<\/p>

Khi t\u1ea3i tr\u1ecdng t\u00e1c d\u1ee5ng l\u00e0 t\u1ea3i tr\u1ecdng kh\u00f4ng \u0111\u1ed5i, n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed9 c\u1ee9ng t\u0129nh; khi l\u00e0 t\u1ea3i xoay chi\u1ec1u g\u1ecdi l\u00e0 \u0111\u1ed9 c\u1ee9ng \u0111\u1ed9ng. \u0110\u1ed9 c\u1ee9ng t\u0129nh ch\u1ee7 y\u1ebfu bao g\u1ed3m \u0111\u1ed9 c\u1ee9ng k\u1ebft c\u1ea5u v\u00e0 \u0111\u1ed9 c\u1ee9ng ti\u1ebfp x\u00fac. \u0110\u1ed9 c\u1ee9ng k\u1ebft c\u1ea5u \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng c\u1ee7a b\u1ea3n th\u00e2n c\u1ea5u ki\u1ec7n, ch\u1ee7 y\u1ebfu bao g\u1ed3m \u0111\u1ed9 c\u1ee9ng khi u\u1ed1n v\u00e0 \u0111\u1ed9 c\u1ee9ng xo\u1eafn.<\/p>

1. \u0110\u1ed9 c\u1ee9ng khi u\u1ed1n: \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c sau:<\/p>

\"\"<\/figure>

3 \u3001 K\u1ebft n\u1ed1i gi\u1eefa hai<\/p>

D\u1ef1a tr\u00ean s\u1ef1 hi\u1ec3u bi\u1ebft l\u00fd thuy\u1ebft \u1edf tr\u00ean v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng, so v\u1edbi \u0111\u1ed9 c\u1ee9ng, \u0111\u1ecbnh ngh\u0129a \u0111\u1ed9 b\u1ec1n l\u00e0 nh\u1eb1m m\u1ee5c \u0111\u00edch ch\u1ec9 s\u1ef1 ph\u00e1 h\u1ee7y d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a ngo\u1ea1i l\u1ef1c, v\u00e0 ki\u1ec3u h\u01b0 h\u1ecfng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 ch\u1ea3y d\u1ebbo v\u00e0 \u0111\u1ee9t g\u00e3y gi\u00f2n, c\u00f3 li\u00ean quan \u0111\u1ebfn \u1ee9ng su\u1ea5t. -strain \u0111\u01b0\u1eddng cong trong l\u1ef1c c\u0103ng. Nh\u01b0 trong h\u00ecnh.<\/p>

\u0110\u01b0\u1eddng cong trong h\u00ecnh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh b\u1ed1n giai \u0111o\u1ea1n:<\/p>

1. Giai \u0111o\u1ea1n bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i;<\/p>

2. Giai \u0111o\u1ea1n n\u0103ng su\u1ea5t;<\/p>

3. Giai \u0111o\u1ea1n c\u1ee7ng c\u1ed1;<\/p>

4. Giai \u0111o\u1ea1n c\u1ed5 \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>

The definition of stiffness is to resist elastic deformation, which is carried out in the first stage. Under elastic action, it meets Hooke’s law. Observe the calculation formula of bending stiffness and torsional stiffness under static load, which is similar to Hooke’s law. It can be inferred that the measurement of stiffness is only carried out in the elastic deformation stage.<\/p>

\"\"<\/figure>

Sau khi b\u01b0\u1edbc v\u00e0o giai \u0111o\u1ea1n ti\u1ebfp theo, bi\u1ebfn d\u1ea1ng d\u01b0 c\u1ee7a \u0111\u00e1m ch\u00e1y bi\u1ebfn d\u1ea1ng d\u1ebbo s\u1ebd kh\u00f4ng bi\u1ebfn m\u1ea5t trong qu\u00e1 tr\u00ecnh k\u00e9o c\u0103ng. D\u01b0\u1edbi \u0111\u01b0\u1eddng cong \u1ee9ng su\u1ea5t-bi\u1ebfn d\u1ea1ng, \u1ee9ng su\u1ea5t g\u1ea7n nh\u01b0 gi\u1ed1ng nhau, trong khi bi\u1ebfn d\u1ea1ng t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, \u1ee9ng su\u1ea5t l\u00e0 gi\u1edbi h\u1ea1n ch\u1ea3y. V\u00e0 \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u, n\u00f3 \u0111i v\u00e0o n\u0103ng su\u1ea5t nh\u1ef1a<\/p>

Trong giai \u0111o\u1ea1n th\u1ea5t b\u1ea1i, sau giai \u0111o\u1ea1n c\u01b0\u1eddng h\u00f3a, s\u1ee9c c\u0103ng t\u0103ng l\u00ean c\u00f9ng v\u1edbi s\u1ef1 gia t\u0103ng c\u1ee7a c\u0103ng th\u1eb3ng, v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n s\u1ee9c m\u1ea1nh. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng ph\u00e9p \u0111o c\u01b0\u1eddng \u0111\u1ed9 l\u00e0 sau khi bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 tr\u01b0\u1edbc khi gi\u1edbi h\u1ea1n \u0111\u1ed9 b\u1ec1n.<\/p>

Cu\u1ed1i c\u00f9ng, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng c\u1ea3 \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111o \u1edf giai \u0111o\u1ea1n h\u1ecfng c\u1ee7a b\u1ed9 ph\u1eadn, trong khi \u0111\u1ed9 c\u1ee9ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u1ee9ng su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng bi\u1ebfn d\u1ea1ng. Trong qu\u00e1 tr\u00ecnh bi\u1ebfn d\u1ea1ng, \u0111\u1ed9 c\u1ee9ng \u1edf giai \u0111o\u1ea1n tr\u01b0\u1edbc v\u00e0 \u0111\u1ed9 b\u1ec1n \u1edf giai \u0111o\u1ea1n sau. Do \u0111\u00f3, trong ph\u00e9p \u0111o \u0111i\u1ec1u ki\u1ec7n h\u01b0 h\u1ecfng c\u1ee7a m\u1ed9t b\u1ed9 ph\u1eadn, mi\u1ec5n l\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 c\u1ee9ng, \u1ee9ng su\u1ea5t \u0111\u1ee7 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ed1ng l\u1ea1i \u1edf giai \u0111o\u1ea1n bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i, v\u00e0 \u0111\u1ed9 b\u1ec1n c\u0169ng \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn theo ti\u1ec1n \u0111\u1ec1 \u0111\u00f3. Theo m\u1ed1i quan h\u1ec7 n\u00e0y, s\u1ebd c\u00f3 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i thi\u1ebft k\u1ebf trong s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf, ch\u1eb3ng h\u1ea1n nh\u01b0 tr\u1ee5c trong thi\u1ebft b\u1ecb c\u01a1 kh\u00ed. Th\u00f4ng th\u01b0\u1eddng, k\u00edch th\u01b0\u1edbc c\u1ee7a tr\u1ee5c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 b\u1ec1n tr\u01b0\u1edbc, sau \u0111\u00f3 ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng theo \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 c\u1ee9ng. Do \u0111\u00f3, y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 c\u1ee9ng c\u1ee7a m\u00e1y m\u00f3c ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t cao, v\u00e0 vi\u1ec7c thi\u1ebft k\u1ebf k\u00edch th\u01b0\u1edbc m\u1eb7t c\u1eaft c\u1ee7a n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9 c\u1ee9ng.<\/p><\/div>","protected":false},"excerpt":{"rendered":"

1\u3001 Strength Definition: the ability of components or parts to resist damage (fracture) or significant deformation under external force. Key words are extracted, fracture is broken and deformation is significant. For example, Sun Yue took the iPad as a weight scale, stood up, and the iPad screen cracked, which is not strong enough. For example,…<\/p>","protected":false},"author":2,"featured_media":19899,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-19893","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2020\/06\/\u56fe\u724715-1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/19893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=19893"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/19893\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/19899"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=19893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=19893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=19893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}