Influence of material parameters on the hydrostatic bulging of a circular diaphragm

Zeghloul, A.; Mesrar, R.; Ferron, G.

doi:10.1016/0020-7403(91)90049-9

Cited by 2 publications

(1 citation statement)

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“…One of the reasons to this is dependency of the true stress upon geometrical assumptions set on bulge geometry. Many authors have conducted detailed research on geometry of the bulge and thickness distribution [6], some of the putting the emphasis on strain determination [7]. Giving more importance to the calculation of stress, led to the introduction of modified hydraulic bulging on the sphere.…”

Section: Introductionmentioning

confidence: 99%

Modified hydraulic bulging in acquisition of stress strain curve

2010

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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.

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Section: Introductionmentioning

confidence: 99%