, . , , .
.
, .
, , , , .
, , . , , . - .
()
, , . . , , .
z.
7.1. Z.
.
. , , ,
:
sz = gZ (7.1)
- , , . :
σx = σy = λσz = λγz. (7.2)
λ :
εx = εy =0, (7.3)
εx = 0 σx = σy = λσz :
Eεx = σx υ(σy + σz), (7.4)
|
|
:
0 = λ σz υ(λ σz + σz); (7.5)
(7.6)
- . (xy), (7.1) (7.2) : εx = εy =0,
(7.7)
- (xy) , , .
σx σy , , , y z.