PSI - Issue 28

Andrey Fedorov et al. / Procedia Structural Integrity 28 (2020) 2245–2252 Andrey Fedorov / Structural Integrity Procedia 00 (2020) 000–000

2251

7

300

  

200

 y  

100

0

0.0001 0.001

0.01

0.1

r / R

Fig. 7. Distribution of stresses σ y along the cylinder axis from the common vertex at ϕ = 30 ◦ , 60 ◦ and 120 ◦ .

a

b







h





R

Fig. 8. (a) Design scheme for four radial cracks; (b) top view of the upper base of the cylinder.

the angles between cracks were also considered. The stress level at the same distances from the common vertex turned out to be lower than for the case when all four angles are equal. Figure 9b presents the stress distributions along the cylinder axis from the common vertex for configurations of [50 ◦ ,70 ◦ ,100 ◦ ,140 ◦ ] and [30 ◦ ,130 ◦ ,80 ◦ ,120 ◦ ].

b

a

100 150 200 250 300 350

100 150 200 250 300 350

  

 

 y  

 y  

0.0001 0 50

0.0001 0 50

0.001

0.01

0.1

0.001

0.01

0.1

r / R

r / R

Fig. 9. Distribution of stresses σ y along the cylinder axis from the common vertex: (a) at various values of ϕ ; (b) for configurations of [50 ◦ ,70 ◦ ,100 ◦ ,140 ◦ ] and [30 ◦ ,130 ◦ ,80 ◦ ,120 ◦ ].