PSI - Issue 2_A

Stepanova Larisa et al. / Procedia Structural Integrity 2 (2016) 1797–1804 Stepanova L.V., Roslyakov P.S., Lomakov P.N. / Structural Integrity Procedia 00 (2016) 000–000

1802

6

a)

22 4

b)

22 4

σ

σ

σ

σ

/

/

22

22

^

N=3,4,5,6,7,8,50,150

r=r/a=0.15

r=r/a=0.05 ^

N=3

2

3

N=5,6,7,8,50,150

2.5

1.5

N=1,2

2

N=1

1.5

1

1

0.5

0.5

-1

1

θ

-3

-2

0

2

3

1

θ

-1

2

3

0

-2

-3

Fig. 5. Angular distributions of the stress components σ 22 near the right crack tip in the specimen with two collinear cracks at di ff erent distances from the crack tip: (a) ˆ r = 0 . 05 , (b) ˆ r = 0 . 15 .

22 4

a)

22 4

σ

b)

σ

σ

σ

/

/

22

22

r=r/a=0.25 ^

r=r/a=0.45 ^

N=3,4

1.6

1.4

N=3,4

N=9,10

N=5,6

1.4

N=5,6

1.2

N=7,8,9,10,11,12,13,14,20

N=11,12,13,14,20

1.2

1

N=1,2

N=1,2

1

0.8

0.8

0.6

0.6

0.4

0.4

0.2

0.2

N=7,8

θ

θ

2

3

-3

-1

0

-3

0

-1

1

1

-2

2

3

-2

Fig. 6. Angular distributions of the stress components σ 22 near the right crack tip in the specimen with two collinear cracks at di ff erent distances from the crack tip: (a) ˆ r = 0 . 25 , (b) ˆ r = 0 . 45 .

22 4

b)

σ

σ

/

22 4

a)

σ

σ

22

/

22

N=20

r=r/a=0.65 ^

1.4

r=r/a=0.65 ^

1.2

N=3,4

N=7,8

1.2

1

1

N=5,6

0.8

0.8

N=9,10

N=1,2

0.6

N=11,12

0.6

N=25,50,150

0.4

0.4

N=20,50,150

0.2

0.2

θ

θ

-3

0

-3

0

-1

1

-2

2

3

-1

1

-2

2

3

Fig. 7. Angular distributions of the stress components σ 22 near the right crack tip in the specimen with two collinear cracks: (a) ˆ r = 0 . 65 , (b) ˆ r = 0 . 65 .