94.6

4.6.1 4-8 F = 4540 N. Sy = 330 MPa, d = 37.5 mm, 150mm , a = 200 mm. Von Mises.

4-8:

: Mx = Fa, Mz =F, . x, z F. ,

4 3 364 32 32 4540 150 131.5

2 2 2 37.5x

xM d F d F d F MPaI I d d

,

4 3 332 16 16 4540 200 87.7

2 37.5z

xyp

M r Fa d Fa MPaJ d d

2 24 4 4540 4.1

37.5F F MPaA d

. ,

2 22 2

1131.5 0 131.5 0 87.7 175.35

2 2 2 2x y x y

xy MPa

2 0 2 2

2 23

131.5 0 131.5 0 87.7 43.852 2 2 2

x y x yxy MPa

:

10

2 22 2

max131.5 0 87.7 109.6

2 2x y

xy MPa

Von Mises ,

22 2 21 1 3 3 175.35 175.35 43.85 43.85 200.9 Pa Von Mises ,

330 1.64200.9

ySN

,

max max

330 1.512 2 109.6

sy yS SN

11

4.6.2 F =10000 N . 3.1. Sut =

172 Pa Suc = 690 Pa, ) , ) Coulomb-Mohr ) Mohr.

2. Sy = 345 Pa, (Von Mises).

3. 1) ;

4-9:

: ( ). :

1

max4 4 4 4 4

10000 250 150 11.132 2150 113

64 64

ox

o i

dM F N mm mmy MPaI d d mm

,

2

4 4 4 4 4

10000 300 150 6.682 2150 113

32 32

oxy

o i

dT F N mm mmr MPaJ d d mm

:2

21,3

22

2 2

14.2611.13 0 11.13 0 6.683.132 2

x y x yxy

12

4-10:

1 1

3 3

3 14.26 42.783 3.13 9.39

t

t

k MPak MPa

. . 1OA 3OA . . , Coulomb-Mohr, Coulomb. ,

1

172 4.042.78

utMOT

SN

: = 162 :

1

162 3.7842.78Co Mo

OB OB OBNOA OA

:

311 42.78 9.39 0.2623 3.81172 690 Co MoCo Mo ut uc

NN S S

. ,

13

1

172 4.042.78

utT Co

SN

2. Von Mises (): 2 2 2 21 1 3 3 14.26 14.26 3.13 3.13 16.05eq MPa

:345 21.5

16.05y

eq

SN

2 2

2 2max

11.13 6.68 8.692 2

xxy MPa

:

max

345/ 2 19.88.69

syM

SN

.

: :

2 2 2 23 11.13 3 6.68 16.05eq x xy MPa 345 21.5

16.05y

eq

SN

,2 2 2 24 11.13 4 6.68 17.38eq x xy MPa

345 19.817.38

yM

eq

SN