Ngày tải lên :
24/04/2013, 14:26
... =1,5.
4,1951197 ,35 4202,125164
22
=+
).
→
48 ,30
40.1,0
4,195119
3
==
B
u
σ
, T
max
=k
qt
.T
II
=1,5.11 433 35,22=1715002, 83
98, 133
40.2,0
83, 1715002
3
==
B
τ
→
MPa
B
td
234 98, 133 .34 8 ,30
22
=+=
σ
T ... c:ể ề ệ ạ ụ
Ta có:D
mm
n
p
sb
I
73, 16
1420
.85 ,3
120120
3
3
1
1
===
D
6,29
52,246
7 ,3
120120
3
3
2
2
===
n
p
sb
II
D
mm
n
p
sb
III
02, 43
03, 77
.55 ,3
120120
3
3
3
3
===
29
ĐÀO VĂN TÙNG :L P:K41CCM6_MSSV:0111051149Ớ ... =1,5.
26,282546625,566545,1796 43
22
=+
T
Max
= 1,5.1 433 35,2 =215002,8(Nmm).
→ σ =
14,44
40.1,0
26,282546
3
=
(Mpa).
τ =
59 ,33
40.2,0
8,215002
3
=
→ σ
td
=
02, 735 9 ,33 .31 4,44
22
=+
(Mpa).
V y ậ σ
max
td
= 234 <...