PSI - Issue 52

Tomislav Polančec et al. / Procedia Structural Integrity 52 (2024) 348 – 355 Tomislav Polančec, Tomislav Lesičar, Jakov Rako / Structural Integrity Procedia 00 (2019) 000 – 000

353

6

10000 12000 14000

0 2000 4000 6000 8000

3D experiment plane stress plane strain

Force, N

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35

Displacement, mm

Fig. 2. The force-displacement diagram.

300

250

200

experiment 2D plane strain 3D 2D plane stress

150

100

50

0 Equivalent Von Mises stress, MPa

0

0.003

0.006

0.009

0.012

Equivalent strain, -

Fig. 3. The stress-strain diagram.

As demonstrated by Figs. 2 and 3, there is very good agreement of numerical results, compared to the experimental testing. 3D setting gives the best agreement of the results, as demonstrated above. In 2D setting, it can be observed the plane strain assumption gives an overestimation in the force-displacement diagram, while plane stress assumption gives much better correspondence of the results. Furthermore, the distribution of the PF variable after the fracture is shown in Fig. 4 on 2D, as 3D model, where position of the fracture is compared to real specimen.