On the nonlinear anelastic behaviour of AHSS
| Autor: | Torkabadi, Ali, Meinders, Vincent T., van den Boogaard, Antonius H., Cardoso, R., De Souza Neto, E., César de Sá, J.M.A., Adetoro, O.B. |
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| Přispěvatelé: | Faculty of Engineering Technology |
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
History Work (thermodynamics) Materials science Dual-phase steel Strain (chemistry) 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Finite element method Computer Science Applications Education Reversible strain Hysteresis Nonlinear system 020901 industrial engineering & automation IR-102458 METIS-319398 Forensic engineering Dislocation 0210 nano-technology |
| Zdroj: | NUMISHEET 2016: 10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/734/3/032100 |
| Popis: | It has been widely observed that below the yield stress the loading/unloading stress-strain curves of plastically deformed metals are in fact not linear but slightly curved, showing a hysteresis behaviour during unloading/reloading cycles. In addition to the purely elastic strain, extra dislocation based micro-mechanisms are contributing to the reversible strain of the material which results in the nonlinear unloading/reloading behaviour. This extra reversible strain is the so called anelastic strain. As a result, the springback will be larger than that predicted by FEM considering only the recovery of the elastic strain. In this work the physics behind the anelastic behaviour is discussed and experimental results for a dual phase steel are demonstrated. Based on the physics of the phenomenon a model for anelastic behaviour is presented that can fit the experimental results with a good accuracy. |
| Databáze: | OpenAIRE |
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