,
.
.. | ||||
2007
:
1. , 腅3
1.1 腅.3
1.2 腅..4
2.
5
2.1 , , ,
, 充.5
2.1.1. .....5
2.2. , ,
充..8
3. ,
充...13
3.1.
셅....13
3.2
腅.16
...23
1. ,
1.1.
|
σx, | σy, | σz, | τxy, | τzy, | τxz, |
-310 |
|
|
|
|
|
|
|
I1= σx +σy +σz=460
I2= σy ּ σz +σz ּ σx +σx ּ σy -τxy2 -τzy2 -τxz2= -224200
σx τxy τxz
I3= τxy σy τzy = (σx ּ σy ּ σz+ τxy ּ τzy ּ τxz+ τxy ּ τzy ּ τxz) - (τxz ּ σy ּ τxz+τxy ּ τxy ּ σz+τzy ּ τzy ּ σx)
τxz τzy σz =-85345000
σk3 - σk2 ּ I1 + σk ּ I2 - I3 = 0
σk3 - σk2 ּ 460 - σk ּ 224200 - 85345000 = 0
|
|
q = = 21878796,29
p = = -98244,45
r = = 313,44 (.. q > 0)
= = 0,7105 = 44,72˚ = 14,9˚
y1 = = -605,8
y2 = = 442,49
y3 = = 163,31
σ1 = = -452,4
σ2 = = 595,82
σ3 = = 316,64
σ1 >σ2 >σ3 σ1 = -452,4; σ2 = 595,82; σ3 = 316,64
I1 = σ1 + σ2 + σ3 = 460
I2 = σ1 ּ σ2 +σ1 ּ σ3 +σ2 ּ σ3 = -224200
I3 = σ1 ּ σ2 ּ σ3 = -85345000
ΔI1= (I1- I1)/ I1=0
ΔI2= (I2- I2)/ I2=0
ΔI3= (I3- I3)/ I3=0
1.2.
: n > [n] n = [n] =
123
σ =700
σ =950
[n] = = 1,74
n = = 1,279
n < [n] .
2.
, , , , .
l1 = l2 = 24
l3 = l4=31
A1 = A2 = 2,5 2
A3 = A4 = 2 2
F= 120
α1=53
α2=40
12
:
;
;
2.1.4
;
;
;
;
N4=313,3 ;
N1=N2 = 99,69
N3=N4 = 313,3 .
2.1.5
: n>[n] n= [n] =
[n] = = 1,74
n = = 4,47
n > [n]
2.2 , ,
M1 = -30 ͷ
M2 = -25 ͷ
M3 = 10 ͷ
D1 = 6.5
D2 = 6.0
D3 = 2,5
d1 = 5.5
d2 = 5.5
d3 = 2.0
l1 = 0,65; l2 = 0,5; l3 = 0,45
.45; = 360; = 610 ; G = 80
; m = -69,23 ͷ