Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test
Abstract
:1. Introduction
2. Materials and Methods
2.1. Taylor Test, Theoretical Background
2.2. Experimental
2.3. Numerical Simulation
3. Results
3.1. Structure Analyses
3.2. Hardness Measurements
3.3. TAT Specimen Analyses
3.4. Dynamic Flow Stress Analysis
3.5. Finite Element Analyses
3.6. Determination of Parameters for Johnson–Cook Model
3.7. Experimental Verification of Developed Johnson–Cook Model
4. Discussion
5. Conclusions
- The predicted distribution of stress-strain parameters was in accordance with the deformed geometry and hardness of the experimental specimen;
- n hardening exponent and m strain rate sensitivity coefficient change at a value of effective strain of ~0.50;
- Optimised parameters of the Johnson–Cook equation for TRISTAL steel were n = 0.3 and m = 0.72;
- The results are not affected by friction-predicted geometry corresponded to the experiment when negligible friction was applied (due to ultra-high strain rate);
- The final verification of the material model performed via real production on TPZD25 automatic sequential machine, documented satisfactory correlation of predicted and experimental results.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Element | C | Mn | Si | P | S | Cr | Ni | W | Cu |
---|---|---|---|---|---|---|---|---|---|
(wt.%) | 0.1 | 0.38 | 0.07 | 0.012 | 0.008 | 0.05 | 0.04 | 0.01 | 0.1 |
Parameter | A [MPa] | B [MPa] | C [-] | n [-] | m [-] |
---|---|---|---|---|---|
value | 273 | 391 | 0.051 | 0.3 | 0.72 |
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Kunčická, L.; Jopek, M.; Kocich, R.; Dvořák, K. Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test. Materials 2021, 14, 4821. https://doi.org/10.3390/ma14174821
Kunčická L, Jopek M, Kocich R, Dvořák K. Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test. Materials. 2021; 14(17):4821. https://doi.org/10.3390/ma14174821
Chicago/Turabian StyleKunčická, Lenka, Miroslav Jopek, Radim Kocich, and Karel Dvořák. 2021. "Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test" Materials 14, no. 17: 4821. https://doi.org/10.3390/ma14174821