PSI - Issue 42

Lucas Mangas Araújo et al. / Procedia Structural Integrity 42 (2022) 1591–1599 Author name / Structural Integrity Procedia 00 (2019) 000 – 000 9 point ( = 1/3 and = 1 ), which indicates that SAE 1045 steel is 1 and 3 sensitive. In this regard, one calibrates Gao’s a and b constants, and the numerical reaction plots obtained satisfa ctorily agreed with the experimental versus curves, confirming that a proper mechanical description needs account for 1 and 3 . Moreover, one notices the influence range of 1 and 3 . For shear-predominant conditions, 3 affects the SAE 1045 steel monotonic response the most, while 1 displays the strongest effect on tensile situations. The Ultra-Low Cycle simulations confirmed once more the SAE 1045 steel 1 and 3 dependence. However, monotonically calibrated and did not lead to adequate corrections on the numerical versus plots, and hence these parameters were recalibrated in ULCF conditions. The recalibration process led to new and and to better numerical predictions. The former suggests that Gao’s constants depend on the hardening type considered, since in the monotonic case only isotropic hardening is accounted for, while mixed hardening is present in ULCF. The remarks stated on the monotonic simulations regarding 1 and 3 influence range are also applicable for ULCF conditions. In either monotonic or Ultra-Low cycle situations, the tested were limited by the model convexity. Acknowledgements The authors would like to acknowledge the financial support provided by Federal District Research Support Foundation (FAPDF) and Lucival Malcher would also like to acknowledge the support from the Brazilian Council for the scientific and Technological Development-CNPq (contract 315215/2021-6). References 1599 [1] Y Bai. Effect of Loading History on Necking and Fracture, Massachusetts Institute of Technology. PhD thesis, PhD thesis, 2008. [2] Gail E Leese and Darrel Socie. 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