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A Comparative Study on the Formability Prediction of Two-Layer Metallic Sheets | ||
| Iranian Journal of Materials Forming | ||
| مقاله 5، دوره 4، شماره 1، تیر 2017، صفحه 39-51 اصل مقاله (966.14 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2017.3998 | ||
| نویسندگان | ||
| H. Deilami Azodi* ؛ R. Darabi | ||
| Arak University of Technology | ||
| چکیده | ||
| Two-layer metallic sheets have wide applications in aerospace, marine, automotive and domestic industries due to their superlative characteristics. In this paper, the formability of two-layer sheet is investigated through analytical, experimental and numerical approaches. An analytical model is developed based on Marciniak-Kuczynski method associated Hill’s non-quadratic yield criterion. Forming limit diagrams are also obtained numerically based on finite element method using Bifurcation theory and ductile fracture criteria. Furthermore, experiments are carried out on Al3105-St14 two-layer sheet. Theoretical results from various methods are compared with results obtained from experiments to evaluate the competency of discussed analytical and numerical methods to predict the formability of two-layer sheets. The results show that analytical and numerical approaches discussed in this paper have good capabilities to predict the formability of two-layer sheets. However, the analytical method based on M-K model and numerical approach based on bifurcation theory are more suitable to determine the forming limit diagram of Al3105-St14 two-layer sheets. | ||
| کلیدواژهها | ||
| Forming Limit Diagram؛ Two-layer Sheet؛ Marciniak-Kuczynski (M-K) Method؛ Bifurcation Theory؛ Ductile Fracture | ||
| مراجع | ||
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