Issue 42

W. De Corte et alii, Frattura ed Integrità Strutturale, 42 (2017) 147-160; DOI: 10.3221/IGF-ESIS.42.16

K

2

, I C m



H

(4)

C m

1 ,

1 2

1 2





p

p

d

d

1

2

 





F

F

(

)

(

)





m m

0, m m

1 0,

21

2





p

p

1

1

1

2

H H

2   

where

C

2

21

H H

C

1

1

Figure 2 : Distribution of the tangential stress   around a rectangular bi-material notch [MPa].

1,80

0,00 Mean tangential stress σ θθ [MPa] d=0.5 mm d=1.0 mm 0,60 1,20

-180

-90

0

90

θ [°]

Figure 3 : Distribution of the mean value of the tangential stress   as a function of  .

a) Initial crack Potential crack path

 appl

m = 1 m = 2

 appl

b)

Initial crack

Potential crack path

c)

Initial crack

Potential crack path

Figure 4 : Possible crack initiation and failure propagation types.

150