Çetin, B.; Bayraktar, E.; Aslan, O. Unveiling the Strain Rate Sensitivity of G18NiCrMo3-6 CAST Steel in Tension/Compression Asymmetry. Appl. Sci.2023, 13, 11891.
Çetin, B.; Bayraktar, E.; Aslan, O. Unveiling the Strain Rate Sensitivity of G18NiCrMo3-6 CAST Steel in Tension/Compression Asymmetry. Appl. Sci. 2023, 13, 11891.
Çetin, B.; Bayraktar, E.; Aslan, O. Unveiling the Strain Rate Sensitivity of G18NiCrMo3-6 CAST Steel in Tension/Compression Asymmetry. Appl. Sci.2023, 13, 11891.
Çetin, B.; Bayraktar, E.; Aslan, O. Unveiling the Strain Rate Sensitivity of G18NiCrMo3-6 CAST Steel in Tension/Compression Asymmetry. Appl. Sci. 2023, 13, 11891.
Abstract
This contribution was devoted to unveil the strain rate sensitivity (SRS) of G18NiCrMo3-6 cast steel in tension/compression asymmetry. For that purpose, detailed mechanical characterization tests were conducted providing a process window covering quasi-static and medium strain rate regimes (0.001, 0.1, 10 [ s¯¹]) in tension and compression states. By means of this experimental ef-fort, the SRS of the material could be extracted by a function of strain and strain rate which ena-bling to create a mathematical expression to easily be implemented as a state variable for constitu-tive material modeling. Finally, a pressure and rate dependent constitutive material model on the basis of Cocks'89 yield locus definition was created by a subroutine (UMAT) file and the material parameters were verified with respect to the experimental data. The UMAT file also takes into account the tension/compression asymmetry in yielding to handle the effect of porous media plas-ticity concept. The predictions of the proposed material model are quite in line with the experi-mental outputs.
Keywords
strain rate sensitivity; G18NiCrMo3-6; cast iron plasticity
Subject
Engineering, Mechanical Engineering
Copyright:
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