Naslov
Numerically Assisted Determination Of A Forming Limit Diagram For Thin Sheet Metal

Autori
Pepelnjak, Tomaž ; Barišić, Branimir ; Kuzman, Karl ; Sladić, Saša

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Advanced in Materials and Processing Technologies 2006 / Mehta, B. ; Hashmi, M. S. J. - Ohio City (OH) : Ohiou University, 2006, 715-718

Skup
Advanced in Materials and Processing Technologies 2006

Mjesto i datum
Sjedinjene Američke Države, 30.07.2006. - 03.08.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Numerical simulations; Forming limit diagram; Material testing; Tinplate sheet metal

Sažetak
The use of modern computer aided tools used for the set-up of sheet metal forming technologies demands accurate and reliable input data. Mechanical properties, tribological conditions and forming limits are the most important data for precise technological predictions and failure evaluations in digital environment. The experimental tests (e.g. Marciniak or Nakazima test) of determining the forming limit diagram (FLD’ s) are difficult to perform when tinplate sheet metals with thickness below 0.25 mm are analysed. Special precautions for experimental determination of the forming limit diagram have to be performed in order to omit the undesired stress concentrations of the formed specimen. The paper presents preparations for a successful Marciniak test carried out in digital environment by the program ABAQUS in order to determine the adequate specimen geometries. A redesign of the workpiece was performed when the excessive thinning at the die radius was observed. Last but not least, the numerically determined geometries were verified by the experiments and the forming limit curve for the analysed material TS-275 was determined.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Računarstvo, Strojarstvo

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