Ngày tải lên :
30/06/2014, 14:40
...
)(12,301250
)5,193252(*34,2921)5,58252(*34,2921252 *77 7,4116
31
Nmm
M
X
=
++=
0
33
=
X
M
0
30
=
Y
M
;
)(1,1004525,58*13, 171 7
32
NmmM
TY
==
)(28 ,77 16238, 177 6141,100452
32
NmmM
PY
==
)(28 ,77 162)5,585,193(*13, 171 738, 177 6145,193*13, 171 7
34
NmmM
TY
==
... rắn Brinen.
74 ,2
1
10. 87, 1 270 .30 ==
HO
N
74 ,2
2
10.4,1230.30 ==
HO
N
8
222
34
2
3434
2 ,73 7921 .75 ,053,414569 .75 ,0 +=+= TMM
td
= 76 175 0,4(Nmm).
222
31
2
3131
2 ,73 7921 .75 ,012,301250 .75 ,0 +=+= ... 85, 87
)71 1. (70 .60
2 ,73 7921.2
1
[ ]
cc
== 52,19
18 .70 .60
2 ,73 7921.2
Tiết diện d
(mm)
l
t
(mm)
bxh t
1
(mm)
T
(Nmm)
d
(MPa)
c
MPa
32,34 60 70 18x11 7 7 379 21,2 87, 85 19,52
33 50 110 14x9 5,5 73 7921,2 76 ,67...