- Tytuł:
- Study on ductile fracture criterion applied to shear fracture prediction of DP780 sheet
- Autorzy:
-
Wu, Jiaxiong
Sun, Xuguang
Sun, Xiaoce
Chang, Fu
Yang, Shudi
Tan, Senqi - Tematy:
-
ductile fracture criterion
DP 780
fracture prediction
shear fracture
sheet forming - Pokaż więcej
- Data publikacji:
- 2024
- Powiązania:
- https://bibliotekanauki.pl/articles/63161963.pdf Link otwiera się w nowym oknie
- Źródło:
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Journal of Theoretical and Applied Mechanics; 2024, 62, 1; 143-156
1429-2955
2543-6309 - Opis:
- With the development of automotive lightweight technology, the improvement of the design of body sheet metal forming processes has gradually become a research focus. Advanced high-strength dual-phase steel is the main material for lightweight vehicle bodies, and exploring its accurate ductile fracture criteria plays an important role in predicting the forming fracture behavior of the sheet metal. The characterizations of the plastic behavior of the DP780 sheet before fracture were performed by the Swift hardening model. Three sets of tests from pure shear to tensile-shear stress states are designed to calibrate the ductile fracture parameters of Lou-Huh, Cockcroft-Latham, and Rice-Tracey criteria. The calibrated parameters are used to predict tensile shear test fractures and punching fractures at small bend fillets of molds. The results show the Lou-Huh criterion can accurately predict the shear fracture behavior of the DP780 sheet in the low-stress triaxiality (0.08-0.33).
- Dostawca treści:
- Biblioteka Nauki
Artykuł