PSI - Issue 54

T. Fekete et al. / Procedia Structural Integrity 54 (2024) 314–321 T. Fekete, D. Antók, L. Tatár, P. Bereczki Structural Integrity Procedia 00 (2019) 000–000

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Summing up, it can be concluded that the DT simulations reproduced the necking location and shape with reasonable accuracy. This result is remarkable, because the effects of material inhomogeneities and anisotropy was excluded from the analyses. Based on the results, it can be concluded that using DT s incorporating realistically defined geometric imperfections, the necking phenomenon can be predicted with high confidence.

4. Summary, Conclusions

As discussed above, the paradigm shift in the SIC methodology requires an increase in the quantity and quality of information obtained from material tests. Methodology is still being developed at the HUN-REN Energy Research Centre as part of a long-term research programme to increase the predictive power of future SIC s; this involves bringing the methodology of measurement and evaluation in line with the SIC methodology. Digital Twin based, theory-driven modelling was chosen as the methodology for evaluating the measurements, so that the data collected by the measurement system could be processed quickly and efficiently. General conceptual and methodological considerations, as well as the simulated tensile tests with the DT system, clearly show that the scope and potential of the new system go far beyond the limits and possibilities of standard evaluation methods. Simulation results on DT s with realistically defined geometric imperfections, using the presented methodology, show that the new theoretically based measurement-evaluation methodology is useful to reduce the impact of manufacturing imperfections on the measurement results. This has an important role to be expected in evaluation methods for miniaturised specimen based material testing investigations.

Acknowledgements

This works and its presentation was supported by the Thematic Excellence Programme 2020 (2020-4.1.1.- TKP2020) of the Ministry of Innovation and Technology of Hungary.

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