Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier
Abstract
:1. Introduction
- Stress–strain curves usually refer to the uniaxial tensile load, whereas the true plastic behaviour of a flange can be biaxial or multiaxial.
- Tensile tests are usually carried out at the standardized strain rate which can be far away from the real one.
2. Experimental Conditions
3. Results of Experiments and Their Discussion
3.1. Mechanical Properties
- -
- the length of the Luders region is shorter at lower strain,
- -
- yield point as well as ultimate strength grow along with the increasing strain rate,
- -
- and, finally, elongation at break drops down, along with increasing strain rate.
3.2. βINT Analysis
3.3. XRD Measurements
3.4. Metallographic Observation and Zn Layer Delamination
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Homogenous | Non-Homogenous (Necking) | ||||
---|---|---|---|---|---|
strain | 5% | 11.8% | 18.7% | 25.6% | 32.5% |
Strain Rate, s−1 | 0.5 × 10−3 | 2.0 × 10−3 | 8.0 × 10−3 | 32.0 × 10−3 |
---|---|---|---|---|
Lower yield point, MPa | 317 ± 3 | 319 ± 3 | 329 ± 3 | 342 ± 3 |
Upper yield point, MPa | 320 ± 3 | 333 ± 3 | 344 ± 3 | 362 ± 3 |
Ultimate strength, MPa | 390 ± 3 | 404 ± 3 | 405 ± 3 | 415 ± 3 |
Elongation at break, % | 35.1 ± 1.4 | 34.8 ± 1.5 | 33.2 ± 1.7 | 33.0 ± 1.3 |
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Pitoňák, M.; Ondruš, J.; Zgútová, K.; Neslušan, M.; Moravec, J. Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier. Materials 2023, 16, 1396. https://doi.org/10.3390/ma16041396
Pitoňák M, Ondruš J, Zgútová K, Neslušan M, Moravec J. Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier. Materials. 2023; 16(4):1396. https://doi.org/10.3390/ma16041396
Chicago/Turabian StylePitoňák, Martin, Ján Ondruš, Katarína Zgútová, Miroslav Neslušan, and Ján Moravec. 2023. "Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier" Materials 16, no. 4: 1396. https://doi.org/10.3390/ma16041396