Characterization of zinc alloy by sheet bulging test with analytical models and digital image correlation

Vitu, Ludovic; Laforge, Nicolas; Malécot, Pierrick; Boudeau, Nathalie; Manov, Stéphan; Milesi, Marc

doi:10.1063/1.5035022

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2021

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“…To achieve a faithful reconstruction of the dome, epipolar geometry [13]- [15] and 3D-Digital Image Correlation (DIC) [16]- [18] techniques were implemented.…”

Section: Introductionmentioning

confidence: 99%

Comparison between 3D-reconstruction optical methods applied to bulge-tests through a feed-forward neural network

Alizzio

Bonfanti

Garozzo³

et al. 2021

ACTA IMEKO

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The mechanical behaviour of rubber-like materials can be investigated through numerous techniques that differ from each other in costs, execution times and parameters described. Bulge test method proved helpful for hyperelastic membranes under plane and equibiaxial stress state. In the present study, bulge tests in force control were carried out on SBR 20% CB-filled specimens. 3D reconstructions of the dome were achieved through two different stereoscopic techniques, the epipolar geometry and the Digital Image Correlation. Through a Feed-Forward Neural Network (FFNN), these reconstructions were compared with the measurements by a laser triangulation sensor taken as reference. 3D-DIC reconstruction was found to be more accurate. Indeed, bias errors of the 3D-DIC and epipolar techniques with respect to the relative reference values, under creep condition, were 0.53 mm and 0.87 mm, respectively.<br /><br />

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“…To achieve a faithful reconstruction of the dome, epipolar geometry [13]- [15] and 3D-Digital Image Correlation (DIC) [16]- [18] techniques were implemented.…”

Section: Introductionmentioning

confidence: 99%