PSI - Issue 68

I. Yucel et al. / Procedia Structural Integrity 68 (2025) 1287–1293 Yucel et al. / Procedia Structural Integrity 00 (2024) 000–000

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Fig. 6. Crack path results of ISS specimen for JC and MMC Models

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Fig. 7. Simulation results of ISS specimen for PF model. (a) Force vs. displacement curves, (b) crack path

for the accumulation of plasticity-related damage, with lower values resulting in earlier fracture. The length scale primarily dictates the width of the crack and, in the current model, also influences fracture toughness, as shown.

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Fig. 8. E ff ect of model parameters on force vs. displacement curves

4. Conclusion

This study assesses the performance of the presented PF ductile fracture model utilizing ductile fracture exper iments with two distinct specimen geometries. For the PST specimen, it is concluded that all three failure models perform well, with minimal mesh dependency. However, for the ISS specimen, the JC and MMC models exhibit mesh dependency in both force-displacement curves and crack path responses. In contrast, the PF model accurately simu-