Issue 72

H.E. Lakache et alii, Frattura ed Integrità Strutturale, 72 (2025) 62-79; DOI: 10.3221/IGF-ESIS.72.06

Figure 7: Stamped: a. NPSMs and b. PSMs.

Figure 8: Applied loads for: a. NPSMs and b. PSMs.

Figure 9: FLDs of NAKAZIMA test for the NPSM and PSM. Fig. 10 presents a comparative analysis between experimentally observed fracture zones and numerically predicted ones. For illustrative purposes, the analysis concentrated on two specimens, specifically L150 and L170, in both PSM and NPSM variations. The findings suggest that the model accurately anticipates the locations of the fracture zones. Tab. 5 presents both experimental and numerical results for the stamping force and maximum tool displacement corresponding to various widths for both types of blanks. The predicted stamping force values for all the considered samples are in good agreement with the experimental values, an increase in specimen width correlates with an elevation in stamping force. Stamping forces for PSMs fall within the range of 3 to 12 kN as shown in Fig. 11a, while NPSMs can require up to

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