In this study, an extended stress-based forming limit diagram (FLD) for prediction of necking based on the Marciniak and Kucznski (M-K) model is represented and applied in tube hydroforming. The bulge forming of a straight tube is simulated by finite element method and verified with published experimental data. This adaptive simulation technique is based on the ability to detect the onset an...

We investigate the structure of \(\omega \)-limit (resp. \(\alpha \)-limit) sets for a monotone map f on regular curve X. show that any \(x\in X\) negative orbit \((x_{n})_{n\ge 0}\) x), set _{f}(x)\) _{f}((x_{n})_{n\ge 0})\)) is minimal set. This also holds whenever x not periodic point. These results extend those Naghmouchi [24] established homeomorphism and Abdelli [1], local dendrite. Furth...

many efforts have been made to model the the hot deformation (dynamic recrystallization) flow curves of different materials. phenomenological constitutive models, physical-based constitutive models and artificial neural network (ann) models are the main methods used for this purpose. however, there is no report on the modeling of warm deformation (dynamic spheroidization) flow curves of any kin...