PSI - Issue 50

Danila D. Vlasov et al. / Procedia Structural Integrity 50 (2023) 299–306 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

303

5

Nk kl cth

2      

max





(10)

xz

2

The analysis of relation (10) shows that the value of maximum stresses depends on two parameters - k and l - and does not depend on the joint width. With the increase of the parameter k , which includes the stiffness and thickness of the adhesive layer and the material of the parts, the maximum stresses increase (Fig. 5) and the load-carrying capacity of the connection decreases.

Fig. 5. Shear stress distribution along the length of the adhesive joint when changing the parameter k : 1 - 0.8; 2 - 0.6; 3 - 0.4.

In the context of the present work, of greater interest is the change of the joint length. Since the hyperbolic cotangent is a decreasing function, with increasing l the value of maximum stresses decreases (Fig. 6), which should lead to an increase in the carrying capacity of the joint, but at the same time the heterogeneity of stresses along the joint length increases. With greater connection lengths, the middle part of the joint is much less involved in the carrying capacity, which leads to an earlier failure of the structure.

Fig. 6. Shear stress distribution along the length of the adhesive joint when changing the joint length l, mm: 1 - 4; 2 – 6; 3 – 10.