Naslov
Recording of a true stress-strain curve by the use of the modified hydraulic bulging

Autori
Škunca, Marko ; Keran, Zdenka ; Math, Miljenko

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

Izvornik
Proceedings of INTECH 2010 / Kudlaček, Jan - Prag : Tisk AS, s.r.o., Jaromer, 2010, 591-594

ISBN
978-80-904502-2-6

Skup
International Conference on Inovative Technologies INTECH 2010

Mjesto i datum
Prag, Češka Republika, 14.09.2010. - 16.09.2010

Vrsta sudjelovanja
Ostalo

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Modified hydraulic bulging; stress - strain curve; hydroforming; FE simulation

Sažetak
From classical hydraulic bulging of circular diaphragm, a new method has been derived, named ; modified hydraulic bulging on the sphere, with a purpose of recording the true stress – strain curves. New method allows more accurate determination of membrane stress in the deforming material. Assumption on the bulk geometry is no longer needed since modification, using sphere as an obstacle, determines the radius of curvature needed in acquisition of membrane stress. Performing modified hydraulic bulging upon just one test specimen, yields three points of stress-strain curve. Experimentally obtained points have different strains, covering different areas of strain ; small, medium and large deformations, within a single experiment. Use of the small transducer integrated in tooling, enables acquisition of force and thus reliable stress acquisition upon the known (spherical) geometry. Recorded true stress-strain curve has been used in creation of finite element model of the modified hydraulic bulging on the sphere.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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