PSI - Issue 81

Ivan Shatskyi et al. / Procedia Structural Integrity 81 (2026) 129–134

133

/ (| | ) N N K hK m l   %

/ ( ) M M K K m l   %

Fig. 1. Dependence of the dimensionless forces

and moment

intensity factors on the distance between defects for

A-S-A and S-A-S configurations.

0 * * | | / m m m  % (

0

2

Fig. 2. Dependence of the dimensionless limit load

) on the distance between defects for A-S-A and S-A-S

2 2 m h E 

/ ( )

l  

  

*

configurations.

4. Conclusions 1. For 2D analysis of partial crack closure in plates with through-thickness inhomogeneity under bending, a line contact model has been developed. This model allows adequate description within the framework of classical plate theory of the complex phenomenon of crack face contact interaction, which in the general case requires three-dimensional analysis. 2. An analytical solution of the bending problem for a periodic system of collinear contact cracks has been constructed using the method of singular integral equations. 3. Using the energy fracture criterion, the dependence of the limit load on the mutual arrangement of cracks has been established. It is shown that crack convergence critically reduces the load-bearing capacity of the structure. 4. It has been found that the calculated strength for a cracked multilayer plate with a stiffer periphery is higher than for a plate with a rigid core. This result has important practical significance for designing multilayer structures.