Ttd4 n i q o ‘ y a m iz v a b u ndan v a ln in g d ia m e tri d n i to p a m iz :
d > 3 2 M „-
S - = 4,
'3 2 -1 ,4 • 10-3 - 1 8 0 - 4
^ G x [ 0 ] V
8 -1 0 4 - я -2
T o p ilg a n q iy m a tla rd a n ka tta si (d = 8 s m ) q a b u l q ilin a d i.
« 0 ,0 8/w =
Ssm 6.2-misoL M, =
2kN-m, M, = 10kN-m, M3 = lkN-m, va M4 = 9kN-m ga d > teng momentlar ta ’sirida bo'lgan valning diametri tanlansin. Ruxsat etilgan urinma kuchlanish [ t ]
= 50 Mpa. Valning o'qi bo'ylab va uning ko'ndalang kesimlari bo'ylab urinma kuchlanishlar epyuralari qurilsin (6.6-rasm). Yechish. M o m e n tla m in g b e rilg a n q iy
m a tla ri asosida b u ro v c h i m o m e n tla r e p y- j j 2
u ra s in i k o ‘ ra m iz .
M u s ta h k a m lik shartidan fo y d f.la n ib eng
katta m o m e n t uchun v a ln in g d ia m e trin i tan-
la y m iz
A l
A l
1ПШ1ТПТ
Г в
M,
c|
'
7
j !
- biM
c iv -
B
Ер.Мь Е р . г 4 4 . 6 C|
C
k
H
m
I
(M P a ) 1 6 M ^ = 11 6 - 1 , 4 - 1 0 ^ e
0
m =
m п [ т \ V Л - - 5 - 1 0
7
V a l
s ir tid a g i
u rin m a
k u c h la n is h
Tmax= M s/W r fo rm u la s id a n a n iq la n a d i.
A-A
B-B
C-C
11.2
B u y e rd a W r= p d 3/1 6 = l, 8
lO ^ M 3. R asm da v a ln in g
x o ‘ q i b o ‘ y la b h a m
d a A - A , B - B v a C - C k e s im la r b o 'y la b u rin m a k u c h la n is h la rn in g o ‘ zgarish
g ra fig i k e ltirilg a n .