11.11-rasm.
Shu kesim da gorizontal kuchlardan hosil bo'lgan
moment
Л Л "
F
2 ° 2
•
= — —
5
£ + 2 a
В kesimdagi to ‘liq moment
M e = р ~ ^ -+ д )~°2 +
I l f — =
a— J F ; ( ( + a ) 2 + F 2a 2
= 6 7 6 0 0 Я -
V
{ ( + 2 a f
((. + 2 a ) 2
l + 2 a 4
Shu y o ‘l bilan С kesimi uchun quyidagilarni olamiz:
F , a 2
F x{ t + a ) a
M = — —
;
M . =
- - —
,
t + 2 a
t + 2 a
r =
F f a *
F ? ( f . + a ? a 2
= _ gL - /^-v + f 2(f+fl)2 = 1 1 4 . t03
H
e
\ ( £ + 2 a f
(H + 2 a )
t . + 2 a
V
s m .
Hisob natijalari С kesimi xavfli kesim ekanligini ko'rsatdi.
Energetik
nazariya b o ‘yicha hisobiy mom entni topamiz:
X ulosa. Biz mazkur bobda murakkab deform atsiya
holatida boMgan ele-
m entlam i mustahkamlikka hisoblash yoMJari bilan tanishib chiqdik.
1. Q a n d a y h o l d a e g i l i s h q i y a e g i l i s h d e b a t a l a d i ? U n i n g h i s o b i y f o r m u l a s i q a n
d a y t u z i l a d i ?
2 . Q i y a e g i l i s h d a n e y t r a l o ‘q k o ‘n d a l a n g k e s i m n i n g b i r o r t a b o s h o 'q i g a m o s
k e l a d i m i ?
3 . Q i y a e g i l i s h d a n e y tr a l o ‘q k o ‘n d a l a n g k e s i m n i n g o g M rlik m a r k a z i d a n o ‘t a d im i?
4 . N o m a r k a z i y s i q i l i s h d e b n i m a g a a y t i l a d i ?
5 . N o m a r k a z i y s i q i l i s h y o k i c h o 'z i l i s h d a k u c h l a n i s h l a r q a n d a y a n i q l a n a d i ?
6 . K e s i m n i n g i n e r s i y a r a d i u s i q a n d a y t o p i l a d i ?
7 . K e s i m y a d r o s i q a n d a y h o l l a r d a a n i q l a n a d i ?
8 . E g il i s h v a b u r a l i s h b i r g a l i k d a t a ’s i r e t g a n d a m u s t a h k a m l i k s h a r t i q a n d a y
M ft/I =
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