Paper Title:
Material Superplastic Parameters Evaluation by a Jump Pressure Blow Forming Test
  Abstract

In this work a method, based on bulge tests performed on a blow forming equipment, for evaluating the superplastic material characteristics is proposed. The pressure imposed on the sheet and the height of the dome of the specimen during the test are used as characterizing parameters. Different pressure levels are applied subsequently in the same test and the strain rate sensitivity index is calculated starting with analytical considerations and then with an inverse approach based on a simple finite element numerical model of the test. The change of the slope in the specimen dome height curve, due to the change of the pressure, is correlated to the strain rate in the sheet. The method has been verified applying other load profiles on the sheet and good agreement has been found between experiments and numerical results obtained by the inverse analysis.

  Info
Periodical
Main Theme
Edited by
F. Micari, M. Geiger, J. Duflou, B. Shirvani, R. Clarke, R. Di Lorenzo and L. Fratini
Pages
119-126
DOI
10.4028/www.scientific.net/KEM.344.119
Citation
D. Sorgente, G. Palumbo, L. Tricarico, "Material Superplastic Parameters Evaluation by a Jump Pressure Blow Forming Test", Key Engineering Materials, Vol. 344, pp. 119-126, 2007
Online since
July 2007
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Price
$32.00
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