:
1. 53 σ .
2. [τ] = = 0,25σ.
3. , : Fr= Ft/z = =2T/(Doz), Ft = 2T/D ; җ ∙; D0 , Fr .
4. :
, [τ] /2; d0 . d0 .
5. d≤d0 - (1...2), .
54.
150. (. 26) F. 45 , 9-4. , ς = 0,5. Ψ = 1,8. . 40.
40
F, | |||||||||||
[σ ] [σ ] [σ ]:
: [σ ] = σ / [ s] [ s] = 3.
σ 45 1.
: [σ ] = 3444 /2
[σ ] = 4255 /2 .
2. []:
:
[] = 56 /2;
[] = 810 /2 ;
[] = 1012 /2 .
, . . , [] 3040 %.
3. :
Ψ = 1,8 ; ς = 0,5 ; [] /2, F , ; d2 .
4. 41 948481 : d, d1, d2 , .
41
9484-81. ()
5. γ<ρ'.
:
tg γ = /(π ∙d 2 ) γ ( ).
ρ' = arctg (f / cos 150).
f 42.
42