W, = 0,0000064/;/5 | ||
MV(I =652[Nm] |
_ ^"max _ n |
rm =41.282[MPa] |
m 2 | ||
d=0,04[m] |
_ _ rm,, +rmin _ ^ ax _ 1056,82[M//] " 2 2 2-W„ 2-0,0000128[m3] |
crna = 102[A/Pa] |
= 41,282[A/Pa] |
Wx = 0,0000064///' | |
<t„ -M*° - 652[A/«i] _]02fWpal | ||
z = 250MPa go |
0,0000064[m'] «■„=*„= 41,282[MPfl] = 0,lrf' = 0,1 • (0.04[/j/]);! =0,0000064/;/'' |
= 0,0000128 m |
W„ =0,2d3 = 0,2 (0.04[;;/])' =0,0000128///' | ||
£g=l Pr i.9 = 102[;V/P«] | ||
5) Obliczenie rzeczywistego współczynnika | ||
z ■ = 300MPa |
bezpieczeństwa S | |
^na ~ ^ m ~ |
-dla zginania 5h |
6 =1,29 |
= 41,282[MPa] |
Z - £ | |
£< = 1 |
^ _ g° g | |
8 P • o\., | ||
A, =1.506 |
' g »a S = 250^)'1 = ,,29 | |
* l,9-102[A//,o] |
II 4^ bo | |
-5* = '.29 |
-dla skręcania c>v | |
II CO |
z ■ • £ S,- “ ’ a • *■„ r 300[MPal • 1 8. =-----= 4,8 5 1,506-41,282[MPa] | |
6) Obliczenie całkowitego współczynnika bezpieczeństwa <5 «3 8t -8S 8=-=^=L= A2+^2 |
c* II NJ Ul | |
M = 1056,82 [Mw] |
,5 = 1,29-4,87 =U5 | |
d = 4,8 cm |
VI, 292 +4,87' |
12