-30 .
:
- = 40 2;
- h = 3,5 ;
- V =140 3.
k =10.
Δ = 0.
_______________________________________________________.
4.1
- | - - - | - - | - - Δ | ||||
m1, | σ = N/, N = km1 | m2 , | τ = /A, =km2 | t, | , | l, | Δ l = l Δ, |
. 4.1 | |||||||
- | - - - | - - | - - Δ | ||||
m1, | σ = N/, N = km1 | m2 , | τ = /A, =km2 | t, | , | l, | Δ l = l Δ, |
|
|
4.2
. 4.1.
Δ l = f(τ),
: Δ l 1 1,0 ;
τ 0,01 1,0
. 4.2.
τ = σtgφ+c
: σ 0,1 2,0 ;
τ 0,1 2,0
4.2
φ
/ | σ, | τ, | Στ, 2 | σ2, | tgφ | φ, . | , |
∑ |
|
|
tgφ *:
tgφ = n∑στ- ∑τ ∑σ = ______________________ (4.1)
n∑ σ2- (∑σ)2
= ∑τ ∑ σ2- ∑σ∑στ = _______________________ (4.2)
n∑ σ2- (∑σ)2
_________________________________________
*: n= 3
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5.1