An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Testing
2.2. Kinematic and Isotropic Plasticity Models: Theoretical Background
2.2.1. Kinematic Material Model
2.2.2. Isotropic Material Model
2.2.3. Material Model Calibration
3. Proposed Isotropic Model
4. Results and Discussion
4.1. Stress-Strain Behavior: Isotropic Model (Voce)
4.2. Stress-Strain Behavior: Proposed Isotropic Model
4.3. Error Analysis
4.4. Combined Armstrong-Frederick with Proposed Isotropic Model: Stress-Strain Evolution
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Appendix A
References
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Strain Amplitude | Material Parameters | Error Index (SSE) | ||||
---|---|---|---|---|---|---|
εa | R∞ (MPa) | Voce | Proposed | Voce | Proposed | |
b | a | s | ||||
0.15% | −56 | 1.307 | 0.514 | 0.923 | 1.914 | 1.601 |
0.175% | −71 | 1.197 | 0.491 | 0.978 | 0.654 | 0.455 |
0.2% | −80 | 3.145 | 0.316 | 0.778 | 0.464 | 0.063 |
0.3% | −84 | 3.620 | 0.223 | 0.802 | 0.338 | 0.022 |
0.4% | −83 | 4.488 | 0.179 | 0.855 | 0.292 | 0.016 |
0.5% | −52 | 2.871 | 0.234 | 0.893 | 0.269 | 0.014 |
0.6% | −52 | 2.581 | 0.290 | 0.853 | 0.298 | 0.019 |
0.7% | −69 | 4.208 | 0.101 | 1.203 | 0.069 | 0.017 |
Single values | R∞,ave1 | ball1 | aall1 | sall1 | 3.401 | 1.766 |
−68 | 2.352 | 0.199 | 0.965 |
Strain Amplitude | Error Index (SSE) | |
---|---|---|
εa | Voce | Proposed |
0.3% | 0.493 | 0.080 |
0.5% | 0.289 | 0.021 |
0.7% | 0.340 | 0.094 |
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Srnec Novak, J.; De Bona, F.; Benasciutti, D. An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve. Metals 2019, 9, 950. https://doi.org/10.3390/met9090950
Srnec Novak J, De Bona F, Benasciutti D. An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve. Metals. 2019; 9(9):950. https://doi.org/10.3390/met9090950
Chicago/Turabian StyleSrnec Novak, Jelena, Francesco De Bona, and Denis Benasciutti. 2019. "An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve" Metals 9, no. 9: 950. https://doi.org/10.3390/met9090950