Limit Strains Analysis of Advanced High Strength Steels Sheets Based on Surface Roughness Measurements
| Autor: | Ladário da Silva, Rafael Oliveira Santos, Fabiane Roberta Freitas da Silva, Lílian Barros da Silveira, Marcelo Costa Cardoso, Luciano Pessanha Moreira, Maria Carolina dos Santos Freitas |
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| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
020901 industrial engineering & automation Materials science Mechanics of Materials Mechanical Engineering Surface roughness General Materials Science 02 engineering and technology Limit (mathematics) Composite material 021001 nanoscience & nanotechnology 0210 nano-technology Condensed Matter Physics |
| Zdroj: | Materials Science Forum. 930:349-355 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.930.349 |
| Popis: | The limit strains of dual-phase steels DP600 and 800 were evaluated in this work with a localization model formulated in plane-stress conditions using elasto-plastic constitutive equations. In this model, a geometrical imperfection parameter is defined from the sheet nominal thickness, initial ferrite grain size and average surface roughness. The proposed identification procedure provided a more physically meaning for this parameter and at best more conservative predictions in the drawing Forming Limit Curve (FLC) range of both investigated dual-phase steels. Nevertheless, the corresponding limit strains in the biaxial stretching region are underestimated with the present theoretical model. Thus, more detailed anisotropic yield function and hardening descriptions must be implemented to improve the accuracy of the FLC prediction of advanced high strength steels. |
| Databáze: | OpenAIRE |
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