. , . , , , . .
(. 7.1 7.5) :
, , Ft = 2*103 WT/d. .
. 7.5.
,
(7.1)
җ , ; d , ; h, t1 , (. . 7.1); [σ] - (. ); l ; l = l, l = l - b
b h . 7.1 () l [ (7.1)].
l=lp + b l = l (. . 7.1). l 8... 10 . 1,5*b, .
(. . 7.2) :
(7.2)
l~l ; (h-t) .
, .
(7.3)
b ; [τ] (. ).
σ > 600 /2 , 45, 50.
:
[σ]= 130...200 /2;
[σ] = 80...110 /2.
, .
[σ] 1,5 . ( ) [σ] = 20...30 /2 ( ).
[τ] = 70...0 /2. .
, 7.1.