Tugevusõpetuse 3. kodutöö, vene keeles
F L 130
F=0 :n QF =F L =¿ QF = = 22 kN
n 6
Q5 Q6 QF2 QM2 5; 6 222+ 4,82=22,6 kN
Q 4 Q 4 22600
= 5 = 25 = =65,3106 Pa 66 MPa [ ] =70 MPa
A 0 d 0 0,0212
66 70 MPa[ ] -
6.
A c =d0=22,115=331,5 mm2
-
2 A C =2d 0 t =222,110=442mm 2
-
FC F 260103
= = = 138 MPa< [ c ] =190 MPa
AC nA C 60,0210,015
!
7.
NL
-
AL
-
NL F F 26010
3
= = = = =108,310 6=109 MPa< [ ] =112 MPa
A L 2 A T , Neto 2( AT - T d 0 ) 2(14,110 -0,010,021)
-4
!
:
: 75x75x10
: d = 20 mm
: a =40 mm
: n = 6
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