PSI - Issue 13

Tomasz Brynk et al. / Procedia Structural Integrity 13 (2018) 1267–1272 Tomasz Brynk/ Structural Integrity Procedia 00 (2018) 000 – 000

1270

4

Fig. 2. Experimental set-up

3. Results and discussion 3.1. Correction coefficients from FEM modelling

Basing on FEM modeling correction coefficients were determined for holes of the same geometry as in the experiment (hole diameter equal to 1.5 mm and hole depths of 0.5, 1 and 1.5 mm). Their values plotted against r/r0 are presented in Fig. 3. Polynomials of fifth order were fitted to obtained data allowing to determine blind hole case coefficients for arbitrary r/r0 ratio in the range from 1.5 to 6.5.

Fig. 3. Correction parameters for different hole depths from FEM model

3.2. Residual stress calculations Figure 4 presents exemplary displacement field maps from DIC measurements and from the model with applied corrections for blind hole case. Maps obtained from the model after parameters optimization are qualitatively and quantitively in satisfactory accordance with measurements results.