PSI - Issue 41

Victor Rizov et al. / Procedia Structural Integrity 41 (2022) 134–144 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

139

6

h z



1

2

1 

r E E e 1 1 

h

,

(21)

h z



1

2



2

r E E e 2 2 

h

,

(22)

h z



1

2

r e    3 1



h

,

(23)

1

h z



1

2



4

r E E e 3 3 

h

,

(24)

h z



1

2

5 

r P P e 

h

,

(25)

h z



1

2

r e    6 2



h

,

(26)

2

h z



1

2



7

r D D e 

h

,

(27)

where

1 h z h    .

(28)

2

2

0.5

1.0 4   , and curve 3 – at

4  

3  (curve 1 – at

Fig. 5. Variation of the strain energy release rate with increase of

, curve 2 – at

2.0

4  

).

r E 3 , r P ,

In formulae (21) – (28), 1 z is the vertical centric axis of the beam, r E 1 ,

r E 2 , r 1  ,

r 2  and r D are the