PSI - Issue 33

4

Victor Rizov et al. / Procedia Structural Integrity 33 (2021) 402–415 Author name / Structural Integrity Procedia 00 (2019) 000–000

405

The displacement, D u , is expressed also as ) ( l a a u DUN DRH D      ,

(5)

Fig. 2. Cross-section of the right-hand delamination crack arm.

DUN  are, respectively, the longitudinal strains at the lower surface of the right-hand

DRH  and

where

l a x   3 . By combining of (1), (4) and (5), one

delamination crack arm and the un-cracked beam portion,

obtains

(

)

v h t 

a

l a 









.

(6)

DRH

DUN

2

The distribution of the strains,  , along the thickness of the right-hand delamination crack arm is written as

2 h DRH   

z

,

(7)

1

where