PSI - Issue 61

Bahman Paygozar et al. / Procedia Structural Integrity 61 (2024) 232–240 Paygozar et al./ Structural Integrity Procedia 00 (2019) 000 – 000

238

7

4.3. Numerical validation Numerical analyses were performed to show the crack propagation in the SENB specimen. As shown in Fig.6 (a c), the crack propagates through the element boundary and interior. The distribution of MaxPS experienced in the elements, corresponding to the displacement values mentioned in the figure, was also shown.

Fig. 5. Illustration of crack propagation in the specimen fabricated (a) horizontally, (b) laterally, and (c) vertically after 3P bending tests.

In this study, only the results of the vertically fabricated specimens were considered for numerical analyses. In order to check the accuracy of the numerical investigations conducted through XFEM, the load-displacement curve extracted from the numerical analysis was plotted against the experimental ones for the vertically fabricated specimens, as shown in Fig.7. The peak load was drawn with a difference less than 5 % which reflects a good agreement between the numerical analysis and the experiments.

(a)

(b)

(c) Fig. 6 Crack propagation in the simulation of the SENB model after (a) 0.1 mm, (b) 0.5 mm, (c) 1 mm displacement.

Fig. 7 Comparison between numerical (XFEM) and experimental results of 3P bending tests of SENB specimens.