Abstract In sheet metal stamping, the occurrence of strain localization in a deformed is considered failure. As so, metal’s formability conventionally evaluated using Forming Limit Diagram (FLD), which separates principal space into safety and unsafety regions by Curve (FLC). This study presents an evaluation method for detecting based on Digital Image Correlation (DIC) during experiment. The c...

Modelling and simulation are important tools during design development processes. For accurate predictions of, e.g. manufacturing processes or final product performance, reliable material data is needed. Usually, the applied models calibrated by utilising direct methods such as conventional uniaxial tensile/compression tests but also inverse occasionally applied. Recently, an effective method, ...

forming limit diagram (fld) is an important diagram by which the formability of sheet metals is studied. strain rate is a very effective parameter influencing the fld which is, in turn, influenced by the forming velocity. in this work, forming limit diagram for st14 was investigated both experimentally and numerically. in addition, the effect of forming velocity was studied and the experiments ...

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 and g...