Modified hydraulic bulging in acquisition of stress strain curve

Škunca, Marko and Math, Miljenko and Grizelj, Branko (2010) Modified hydraulic bulging in acquisition of stress strain curve. = Modified hydraulic bulging in acquisition of stress strain curve. International Journal of Material Forming, 3 (SUPPL.). pp. 299-302. ISSN 1960-6206. . .

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From classical hydraulic bulging of a circular diaphragm, a new method of recording a stress-strain curve is derived named modified hydraulic bulging on the sphere. 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; small, medium and large deformations, within a single experiment. Use of the small transducer integrated in apparatus, enables acquisition of force and thus reliable stress acquisition upon the known (spherical) geometry. Likewise, the obtained stress-strain curve can be used in a finite element model of the modified hydraulic bulging on the sphere that is now under development. © 2010 Springer-Verlag France.

Item Type: Article (UNSPECIFIED)
Keywords (Croatian): Circular diaphragms; Deforming materials; Finite element models; Hydroforming; Large deformations; Membrane stress; Modified hydraulic bulging; Radius of curvature; Test specimens; Deformation; Finite element method; Mergers and acquisitions; Spheres; Strain; Stress-strain curves; Hydraulics
Divisions: 1200 Department of Technology > 1220 Chair of Metal Forming
1200 Department of Technology
Indexed in Web of Science: Yes
Indexed in Current Contents: No
Citations JCR: 0 (13.4.2015.)
Citations SCOPUS: 0 (13.4.2015.)
Date Deposited: 13 Apr 2015 08:10
Last Modified: 14 Apr 2015 09:02

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